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cantera/src/kinetics/importKinetics.cpp
Ray Speth 7b7d3ac0d4 Fixed locale-dependent processing of XML files 
Floating point values are read using a std::stringstream imbued with the "C"
locale to avoid problems with using std::atof when the user's locale uses a
character other than "." as the decimal separator.

Patch provided by Phillip Berndt.

Fixes Issue 153.
2013-04-03 23:10:18 +00:00

1158 lines
41 KiB
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/**
* @file importKinetics.cpp
* Declarations of global routines for the importing
* of kinetics data from XML files (see \ref inputfiles).
*
* This file contains routines which are global routines, i.e.,
* not part of any object. These routine take as input, ctml
* pointers to data, and pointers to %Cantera objects. The purpose
* of these routines is to initialize the %Cantera objects with data
* from the ctml tree structures.
*/
// Copyright 2002 California Institute of Technology
#include "cantera/kinetics/importKinetics.h"
#include "cantera/thermo/mix_defs.h"
#include <time.h>
#include <memory>
// Cantera includes
#include "cantera/thermo/speciesThermoTypes.h"
#include "cantera/thermo/ThermoPhase.h"
#include "cantera/thermo/SurfPhase.h"
#include "cantera/thermo/EdgePhase.h"
#include "cantera/thermo/ThermoFactory.h"
#include "cantera/thermo/SpeciesThermoFactory.h"
#include "cantera/kinetics/KineticsFactory.h"
#include "cantera/kinetics/reaction_defs.h"
#include "cantera/kinetics/ReactionData.h"
#include "cantera/base/global.h"
#include "cantera/base/stringUtils.h"
#include "cantera/base/xml.h"
#include "cantera/base/ctml.h"
#include <cstdlib>
using namespace ctml;
using namespace std;
namespace Cantera
{
ReactionRules::ReactionRules() :
skipUndeclaredSpecies(false),
skipUndeclaredThirdBodies(false),
allowNegativeA(false)
{
}
//! these are all used to check for duplicate reactions
class rxninfo
{
public:
//! Net stoichiometric coefficients for each reaction
std::vector< std::map<int, doublereal> > m_rdata;
//! string name (i.e. the reaction equation)
std::vector<std::string> m_eqn;
//! Indicates whether each reaction is marked "duplicate"
std::vector<int> m_dup;
//! Number of reactants in each reaction
std::vector<size_t> m_nr;
//! Indicates "type" of each reaction (see reaction_defs.h)
std::vector<int> m_typ;
//! Indicates whether each reaction is reversible
std::vector<bool> m_rev;
//! Map of (vector indicating participating species) to reaction numbers
//! Used to speed up duplicate reaction checks.
std::map<std::vector<char>, std::vector<size_t> > m_participants;
bool installReaction(int i, const XML_Node& r, Kinetics& kin,
std::string default_phase, ReactionRules& rule,
bool validate_rxn) ;
};
/*
* Check a reaction to see if the elements balance.
*/
void checkRxnElementBalance(Kinetics& kin,
const ReactionData& rdata, doublereal errorTolerance)
{
doublereal kstoich;
map<string, double> bal, balr, balp;
bal.clear();
balp.clear();
balr.clear();
//cout << "checking " << rdata.equation << endl;
size_t np = rdata.products.size();
// iterate over the products
for (size_t index = 0; index < np; index++) {
size_t kp = rdata.products[index]; // index of the product in 'kin'
size_t n = kin.speciesPhaseIndex(kp); // phase this product belongs to
size_t klocal = kp - kin.kineticsSpeciesIndex(0,n); // index within this phase
kstoich = rdata.pstoich[index]; // product stoichiometric coeff
const ThermoPhase& ph = kin.speciesPhase(kp);
for (size_t m = 0; m < ph.nElements(); m++) {
bal[ph.elementName(m)] += kstoich*ph.nAtoms(klocal,m);
balp[ph.elementName(m)] += kstoich*ph.nAtoms(klocal,m);
//cout << "product species " << ph.speciesName(klocal) << " has " << ph.nAtoms(klocal,m)
// << " atoms of " << ph.elementName(m) << " and kstoich = " << kstoich << endl;
}
}
for (size_t index = 0; index < rdata.reactants.size(); index++) {
size_t kr = rdata.reactants[index];
size_t n = kin.speciesPhaseIndex(kr);
//klocal = kr - kin.start(n);
size_t klocal = kr - kin.kineticsSpeciesIndex(0,n);
kstoich = rdata.rstoich[index];
const ThermoPhase& ph = kin.speciesPhase(kr);
for (size_t m = 0; m < ph.nElements(); m++) {
bal[ph.elementName(m)] -= kstoich*ph.nAtoms(klocal,m);
balr[ph.elementName(m)] += kstoich*ph.nAtoms(klocal,m);
//cout << "reactant species " << ph.speciesName(klocal) << " has " << ph.nAtoms(klocal,m)
// << " atoms of " << ph.elementName(m) << " and kstoich = " << kstoich << endl;
}
}
map<string, double>::iterator b = bal.begin();
string msg = "\n\tElement Reactants Products";
bool ok = true;
doublereal err, elemsum;
for (; b != bal.end(); ++b) {
elemsum = fabs(balr[b->first]) + fabs(balp[b->first]);
if (elemsum > 0.0) {
err = fabs(b->second/elemsum);
if (err > errorTolerance) {
ok = false;
msg += "\n\t"+b->first+" "+ fp2str(balr[b->first])
+" "+ fp2str(balp[b->first]);
}
}
}
if (!ok) {
msg = "The following reaction is unbalanced:\n\t"
+ rdata.equation + "\n" + msg + "\n";
throw CanteraError("checkRxnElementBalance",msg);
}
}
/**
* Get the reactants or products of a reaction. The information
* is returned in the spnum, stoich, and order vectors. The
* length of the vectors is the number of different types of
* reactants or products found for the reaction.
*
* Input
* --------
* rxn -> xml node pointing to the reaction element
* in the xml tree.
* kin -> Reference to the kinetics object to install
* the information into.
* rp = 1 -> Go get the reactants for a reaction
* -1 -> Go get the products for a reaction
* default_phase = String name for the default phase
* to loop up species in.
* Output
* -----------
* spnum = vector of species numbers found.
* Length is number of reactants or products.
* stoich = stoichiometric coefficient of the reactant or product
* Length is number of reactants or products.
* order = Order of the reactant and product in the reaction
* rate expression
* rules = If we fail to find a species, we will throw an error
* if rule != 1. If rule = 1, we simply return false,
* allowing the calling routine to skip this reaction
* and continue.
*/
bool getReagents(const XML_Node& rxn, Kinetics& kin, int rp,
std::string default_phase, std::vector<size_t>& spnum,
vector_fp& stoich, vector_fp& order,
const ReactionRules& rules)
{
string rptype;
/*
* The id of reactants and products are kept in child elements
* of reaction, named "reactants" and "products". We search
* the xml tree for these children based on the value of rp,
* and store the xml element pointer here.
*/
if (rp == 1) {
rptype = "reactants";
} else {
rptype = "products";
}
const XML_Node& rg = rxn.child(rptype);
/*
* The species and stoichiometric coefficient for the species
* are stored as a colon separated pair. Get all of these
* pairs in the reactions/products object.
*/
vector<string> key, val;
getPairs(rg, key, val);
/*
* Loop over each of the pairs and process them
*/
doublereal ord, stch;
string ph, sp;
map<string, size_t> speciesMap;
for (size_t n = 0; n < key.size(); n++) {
sp = key[n]; // sp is the string name for species
ph = "";
/*
* Search for the species in the kinetics object using the
* member function kineticsSpeciesIndex(). We will search
* for the species in all phases defined in the kinetics operator.
*/
size_t isp = kin.kineticsSpeciesIndex(sp);
if (isp == npos) {
if (rules.skipUndeclaredSpecies) {
return false;
} else {
throw CanteraError("getReagents",
"Undeclared reactant or product species "+sp);
return false;
}
}
/*
* For each reagent, we store the the species number, isp
* the stoichiometric coefficient, val[n], and the order
* species in the reaction rate expression. We assume mass
* action kinetics here, but will modify this below for
* specified species.
*/
spnum.push_back(isp);
stch = fpValue(val[n]);
stoich.push_back(stch);
ord = doublereal(stch);
order.push_back(ord);
//cout << key[n] << " " << isp << " " << stch << endl;
/*
* Needed to process reaction orders below.
*/
speciesMap[sp] = order.size();
}
/*
* Check to see if reaction orders have been specified.
*/
if (rp == 1 && rxn.hasChild("order")) {
vector<XML_Node*> ord;
rxn.getChildren("order",ord);
doublereal forder;
for (size_t nn = 0; nn < ord.size(); nn++) {
const XML_Node& oo = *ord[nn];
string sp = oo["species"];
size_t loc = speciesMap[sp];
if (loc == 0)
throw CanteraError("getReagents",
"reaction order specified for non-reactant: "
+sp);
forder = fpValue(oo());
if (forder < 0.0) {
throw CanteraError("getReagents",
"reaction order must be non-negative");
}
// replace the stoichiometric coefficient
// stored above in 'order' with the specified
// reaction order
order[loc-1] = forder;
}
}
return true;
}
/**
* getArrhenius() parses the xml element called Arrhenius.
* The Arrhenius expression is
* \f[ k = A T^(b) exp (-E_a / RT). \f]
*/
static void getArrhenius(const XML_Node& node, int& highlow,
doublereal& A, doublereal& b, doublereal& E)
{
if (node["name"] == "k0") {
highlow = 0;
} else {
highlow = 1;
}
/*
* We parse the children for the A, b, and E components.
*/
A = getFloat(node, "A", "toSI");
b = getFloat(node, "b");
E = getFloat(node, "E", "actEnergy");
E /= GasConstant;
}
/**
* getStick() processes the XML element called Stick that specifies
* the sticking coefficient reaction. This routine will
* translate the sticking coefficient value into a "normal"
* rate constant for the surface reaction.
*
* Output
* -----------
* Output is the normal Arrhenius expressions for a surface
* reaction rate constant.
*
* A - units such that rate of rxn has kmol/m^2/s when
* A is multiplied by activity concentrations of
* reactants in the normal manner.
* n - unitless
* E - Units 1/Kelvin
*/
static void getStick(const XML_Node& node, Kinetics& kin,
ReactionData& r, doublereal& A, doublereal& b, doublereal& E)
{
size_t nr = r.reactants.size();
size_t k, klocal, not_surf = 0;
size_t np = 0;
doublereal f = 1.0;
doublereal order;
/*
* species is the name of the special reactant whose surface
* flux rate will be calculated.
* isp = species # in the local phase
* ispKinetics = species # in the kinetics object
* ispPhaseIndex = phase # of the special species
*/
string spname = node["species"];
ThermoPhase& th = kin.speciesPhase(spname);
size_t isp = th.speciesIndex(spname);
size_t ispKinetics = kin.kineticsSpeciesIndex(spname);
size_t ispPhaseIndex = kin.speciesPhaseIndex(ispKinetics);
doublereal ispMW = th.molecularWeights()[isp];
doublereal sc;
// loop over the reactants
for (size_t n = 0; n < nr; n++) {
k = r.reactants[n];
order = r.rorder[n]; // stoich coeff
// get the phase species k belongs to
np = kin.speciesPhaseIndex(k);
const ThermoPhase& p = kin.thermo(np);
// get the local index of species k in this phase
klocal = p.speciesIndex(kin.kineticsSpeciesName(k));
// if it is a surface species, divide f by the standard
// concentration for this species, in order to convert
// from concentration units used in the law of mass action
// to coverages used in the sticking probability
// expression
if (p.eosType() == cSurf || p.eosType() == cEdge) {
sc = p.standardConcentration(klocal);
f /= pow(sc, order);
}
// Otherwise:
else {
// We only allow one species to be in the phase
// containing the special sticking coefficient
// species.
if (ispPhaseIndex == np) {
not_surf++;
}
// Other bulk phase species on the other side
// of ther interface are treated like surface
// species.
else {
sc = p.standardConcentration(klocal);
f /= pow(sc, order);
}
}
}
if (not_surf != 1) {
throw CanteraError("getStick",
"reaction probabilities can only be used in "
"reactions with exactly 1 gas/liquid species.");
}
doublereal cbar = sqrt(8.0*GasConstant/(Pi*ispMW));
A = 0.25 * getFloat(node, "A", "toSI") * cbar * f;
b = getFloat(node, "b") + 0.5;
E = getFloat(node, "E", "actEnergy");
E /= GasConstant;
}
static void getCoverageDependence(const XML_Node& node,
thermo_t& surfphase, ReactionData& rdata)
{
vector<XML_Node*> cov;
node.getChildren("coverage", cov);
size_t k, nc = cov.size();
doublereal e;
string spname;
if (nc > 0) {
for (size_t n = 0; n < nc; n++) {
const XML_Node& cnode = *cov[n];
spname = cnode["species"];
k = surfphase.speciesIndex(spname);
rdata.cov.push_back(doublereal(k));
rdata.cov.push_back(getFloat(cnode, "a"));
rdata.cov.push_back(getFloat(cnode, "m"));
e = getFloat(cnode, "e", "actEnergy");
rdata.cov.push_back(e/GasConstant);
}
}
}
//! Get falloff parameters for a reaction.
/*!
* This routine reads the falloff XML node and extracts parameters into a
* vector of doubles
*
*
* @verbatim
<falloff type="Troe"> 0.5 73.2 5000. 9999. </falloff>
@endverbatim
*/
static void getFalloff(const XML_Node& f, ReactionData& rdata)
{
string type = f["type"];
vector<string> p;
getStringArray(f,p);
vector_fp c;
int np = static_cast<int>(p.size());
for (int n = 0; n < np; n++) {
c.push_back(fpValue(p[n]));
}
if (type == "Troe") {
if (np == 4) {
rdata.falloffType = TROE4_FALLOFF;
} else if (np == 3) {
rdata.falloffType = TROE3_FALLOFF;
} else {
throw CanteraError("getFalloff()", "Troe parameterization is specified by number of parameters, "
+ int2str(np) + ", is not equal to 3 or 4");
}
} else if (type == "SRI") {
if (np == 5) {
rdata.falloffType = SRI5_FALLOFF;
if (c[2] < 0.0) {
throw CanteraError("getFalloff()", "SRI5 m_c parameter is less than zero: " + fp2str(c[2]));
}
if (c[3] < 0.0) {
throw CanteraError("getFalloff()", "SRI5 m_d parameter is less than zero: " + fp2str(c[3]));
}
} else if (np == 3) {
rdata.falloffType = SRI3_FALLOFF;
if (c[2] < 0.0) {
throw CanteraError("getFalloff()", "SRI3 m_c parameter is less than zero: " + fp2str(c[2]));
}
} else {
throw CanteraError("getFalloff()", "SRI parameterization is specified by number of parameters, "
+ int2str(np) + ", is not equal to 3 or 5");
}
}
rdata.falloffParameters = c;
}
/**
* Get the enhanced collision efficiencies. It is assumed that the
* reaction mechanism is homogeneous, so that all species belong
* to phase(0) of 'kin'.
*/
static void getEfficiencies(const XML_Node& eff, Kinetics& kin,
ReactionData& rdata, const ReactionRules& rules)
{
// set the default collision efficiency
rdata.default_3b_eff = fpValue(eff["default"]);
vector<string> key, val;
getPairs(eff, key, val);
string nm;
string phse = kin.thermo(0).id();
for (size_t n = 0; n < key.size(); n++) { // ; bb != ee; ++bb) {
nm = key[n];// bb->first;
size_t k = kin.kineticsSpeciesIndex(nm, phse);
if (k != npos) {
rdata.thirdBodyEfficiencies[k] = fpValue(val[n]); // bb->second;
} else if (!rules.skipUndeclaredThirdBodies) {
throw CanteraError("getEfficiencies", "Encountered third-body "
"efficiency for undefined species \"" + nm + "\"\n"
"while adding reaction " + int2str(rdata.number+1) + ".");
}
}
}
/*
* Extract the rate coefficient for a reaction from the xml node, kf.
* kf should point to a XML element named "rateCoeff".
* rdata is the partially filled ReactionData object for the reaction.
* This function will fill in more fields in the ReactionData object.
*
* @param kf Reference to the XML Node named rateCoeff
*/
void getRateCoefficient(const XML_Node& kf, Kinetics& kin,
ReactionData& rdata, const ReactionRules& rules)
{
if (rdata.reactionType == PLOG_RXN) {
rdata.rateCoeffType = PLOG_REACTION_RATECOEFF_TYPE;
for (size_t m = 0; m < kf.nChildren(); m++) {
const XML_Node& node = kf.child(m);
double p = getFloat(node, "P", "toSI");
vector_fp& rate = rdata.plogParameters.insert(
std::make_pair(p, vector_fp()))->second;
rate.resize(3);
rate[0] = getFloat(node, "A", "toSI");
rate[1] = getFloat(node, "b");
rate[2] = getFloat(node, "E", "actEnergy") / GasConstant;
}
} else if (rdata.reactionType == CHEBYSHEV_RXN) {
rdata.rateCoeffType = CHEBYSHEV_REACTION_RATECOEFF_TYPE;
rdata.chebTmin = getFloat(kf, "Tmin", "toSI");
rdata.chebTmax = getFloat(kf, "Tmax", "toSI");
rdata.chebPmin = getFloat(kf, "Pmin", "toSI");
rdata.chebPmax = getFloat(kf, "Pmax", "toSI");
const XML_Node& coeffs = kf.child("floatArray");
rdata.chebDegreeP = atoi(coeffs["degreeP"].c_str());
rdata.chebDegreeT = atoi(coeffs["degreeT"].c_str());
getFloatArray(kf, rdata.chebCoeffs, false);
} else {
string type = kf.attrib("type");
if (type == "") {
type = "Arrhenius";
rdata.rateCoeffType = ARRHENIUS_REACTION_RATECOEFF_TYPE;
}
if (type == "ExchangeCurrentDensity") {
rdata.rateCoeffType = EXCHANGE_CURRENT_REACTION_RATECOEFF_TYPE;
} else if (type == "Arrhenius") {
} else {
throw CanteraError("getRateCoefficient", "Unknown type: " + type);
}
vector_fp clow(3,0.0), chigh(3,0.0);
for (size_t m = 0; m < kf.nChildren(); m++) {
const XML_Node& c = kf.child(m);
string nm = c.name();
int highlow=0;
if (nm == "Arrhenius") {
vector_fp coeff(3);
if (c["type"] == "stick") {
getStick(c, kin, rdata, coeff[0], coeff[1], coeff[2]);
chigh = coeff;
} else {
getArrhenius(c, highlow, coeff[0], coeff[1], coeff[2]);
if (highlow == 1 || rdata.reactionType == THREE_BODY_RXN
|| rdata.reactionType == ELEMENTARY_RXN) {
chigh = coeff;
} else {
clow = coeff;
}
}
if (rdata.reactionType == SURFACE_RXN) {
getCoverageDependence(c,
kin.thermo(kin.surfacePhaseIndex()), rdata);
}
if (coeff[0] <= 0.0 && !rules.allowNegativeA) {
throw CanteraError("getRateCoefficient",
"negative or zero A coefficient for reaction "+int2str(rdata.number));
}
} else if (nm == "Arrhenius_ExchangeCurrentDensity") {
vector_fp coeff(3);
getArrhenius(c, highlow, coeff[0], coeff[1], coeff[2]);
chigh = coeff;
rdata.rateCoeffType = EXCHANGE_CURRENT_REACTION_RATECOEFF_TYPE;
} else if (nm == "falloff") {
getFalloff(c, rdata);
} else if (nm == "efficiencies") {
getEfficiencies(c, kin, rdata, rules);
} else if (nm == "electrochem") {
rdata.beta = fpValue(c["beta"]);
}
}
/*
* Store the coefficients in the ReactionData object for return
* from this function.
*/
if (rdata.reactionType == CHEMACT_RXN) {
rdata.rateCoeffParameters = clow;
} else {
rdata.rateCoeffParameters = chigh;
}
if (rdata.reactionType == FALLOFF_RXN) {
rdata.auxRateCoeffParameters = clow;
} else if (rdata.reactionType == CHEMACT_RXN) {
rdata.auxRateCoeffParameters = chigh;
}
}
}
/*
* This function returns true if two reactions are duplicates of
* one another, and false otherwise. The input arguments are two
* maps from species number to stoichiometric coefficient, one for
* each reaction. The reactions are considered duplicates if their
* stoichiometric coefficients have the same ratio for all
* species.
*/
doublereal isDuplicateReaction(std::map<int, doublereal>& r1,
std::map<int, doublereal>& r2)
{
map<int, doublereal>::const_iterator b = r1.begin(), e = r1.end();
int k1 = b->first;
doublereal ratio = 0.0;
if (r1[k1] == 0.0 || r2[k1] == 0.0) {
goto next;
}
ratio = r2[k1]/r1[k1];
++b;
for (; b != e; ++b) {
k1 = b->first;
if (r1[k1] == 0.0 || r2[k1] == 0.0) {
goto next;
}
if (fabs(r2[k1]/r1[k1] - ratio) > 1.e-8) {
goto next;
}
}
return ratio;
next:
ratio = 0.0;
b = r1.begin();
k1 = b->first;
if (r1[k1] == 0.0 || r2[-k1] == 0.0) {
return 0.0;
}
ratio = r2[-k1]/r1[k1];
++b;
for (; b != e; ++b) {
k1 = b->first;
if (r1[k1] == 0.0 || r2[-k1] == 0.0) {
return 0.0;
}
if (fabs(r2[-k1]/r1[k1] - ratio) > 1.e-8) {
return 0.0;
}
}
return ratio;
}
/**
* Install an individual reaction into a kinetics manager. The
* data for the reaction is in the xml_node r. In other words, r
* points directly to a ctml element named "reaction". i refers
* to the number id of the reaction in the kinetics object.
*
* @param iRxn Reaction number.
* @param r XML_Node containing reaction data.
* @param kin Kinetics manager to which reaction will be added.
* @param default_phase Default phase for locating a species
* @param rules Rule for handling reactions with missing species
* (skip or flag as error)
* @param validate_rxn If true, check that this reaction is not a
* duplicate of one already entered, and check that the reaction
* balances.
*
* @ingroup kineticsmgr
*/
bool rxninfo::installReaction(int iRxn, const XML_Node& r, Kinetics& kin,
string default_phase, ReactionRules& rules,
bool validate_rxn)
{
// Check to see that we are in fact at a reaction node
if (r.name() != "reaction") {
throw CanteraError(" rxninfo::installReaction",
" expected xml node reaction, got " + r.name());
}
// We use the ReactionData object to store initial values read in from the
// xml data. Then, when we have collected everything we add the reaction to
// the kinetics object, kin, at the end of the routine.
ReactionData rdata;
rdata.validate = validate_rxn;
// Check to see if the reaction is specified to be a duplicate of another
// reaction. It's an error if the reaction is a duplicate and this is not
// set.
int dup = (r.hasAttrib("duplicate")) ? 1 : 0;
// Check to see if the reaction rate constant can be negative. It's an
// error if a negative rate constant is found and this is not set.
rules.allowNegativeA = (r.hasAttrib("negative_A")) ? 1 : 0;
// Use the contents of the "equation" child element as the reaction's
// string representation. Post-process to convert "[" and "]" characters
// back into "<" and ">" which cannot easily be stored in an XML file. This
// reaction string is used only for display purposes. It is not parsed for
// the identities of reactants or products.
string eqn = (r.hasChild("equation")) ? r("equation") : "<no equation>";
for (size_t nn = 0; nn < eqn.size(); nn++) {
if (eqn[nn] == '[') {
eqn[nn] = '<';
} else if (eqn[nn] == ']') {
eqn[nn] = '>';
}
}
// get the reactants
bool ok = getReagents(r, kin, 1, default_phase, rdata.reactants,
rdata.rstoich, rdata.rorder, rules);
// Get the products. We store the id of products in rdata.products
ok = ok && getReagents(r, kin, -1, default_phase, rdata.products,
rdata.pstoich, rdata.porder, rules);
// if there was a problem getting either the reactants or the products,
// then abort.
if (!ok) {
return false;
}
// check whether the reaction is specified to be
// reversible. Default is irreversible.
string isrev = r["reversible"];
rdata.reversible = (isrev == "yes" || isrev == "true");
// If reaction orders are specified, then this reaction does not follow
// mass-action kinetics, and is not an elementary reaction. So check that
// it is not reversible, since computing the reverse rate from
// thermochemistry only works for elementary reactions. Set the type to
// global, so that kinetics managers will know to process the reaction
// orders.
if (r.hasChild("order")) {
if (rdata.reversible == true)
throw CanteraError("installReaction",
"reaction orders may only be given for "
"irreversible reactions");
rdata.global = true;
}
// Some reactions can be elementary reactions but have fractional
// stoichiometries wrt to some products and reactants. An example of these
// are solid reactions involving phase transformations. Species with
// fractional stoichiometries must be from single-species phases with
// unity activities. For these reactions set the bool isReversibleWithFrac
// to true.
if (rdata.reversible == true) {
for (size_t i = 0; i < rdata.products.size(); i++) {
doublereal po = rdata.porder[i];
AssertTrace(po == rdata.pstoich[i]);
doublereal chk = po - 1.0 * int(po);
if (chk != 0.0) {
size_t k = rdata.products[i];
// Special case when k is a single species phase.
if (kin.speciesPhase(k).nSpecies() == 1) {
rdata.porder[i] = 0.0;
}
rdata.isReversibleWithFrac = true;
}
}
for (size_t i = 0; i < rdata.reactants.size(); i++) {
doublereal ro = rdata.rorder[i];
AssertTrace(ro == rdata.rstoich[i]);
doublereal chk = ro - 1.0 * int(ro);
if (chk != 0.0) {
size_t k = rdata.reactants[i];
// Special case when k is a single species phase.
if (kin.speciesPhase(k).nSpecies() == 1) {
rdata.rorder[i] = 0.0;
}
rdata.isReversibleWithFrac = true;
}
}
}
/*
* Search the reaction element for the attribute "type".
* If found, then branch on the type, to fill in appropriate
* fields in rdata.
*/
rdata.reactionType = ELEMENTARY_RXN;
string typ = r["type"];
if (typ == "falloff") {
rdata.reactionType = FALLOFF_RXN;
rdata.falloffType = SIMPLE_FALLOFF;
} else if (typ == "chemAct") {
rdata.reactionType = CHEMACT_RXN;
rdata.falloffType = SIMPLE_FALLOFF;
} else if (typ == "threeBody") {
rdata.reactionType = THREE_BODY_RXN;
} else if (typ == "plog") {
rdata.reactionType = PLOG_RXN;
} else if (typ == "chebyshev") {
rdata.reactionType = CHEBYSHEV_RXN;
} else if (typ == "surface") {
rdata.reactionType = SURFACE_RXN;
} else if (typ == "edge") {
rdata.reactionType = EDGE_RXN;
} else if (typ != "") {
throw CanteraError("installReaction", "Unknown reaction type: " + typ);
}
// Look for undeclared duplicate reactions.
if (validate_rxn) {
map<int, doublereal> rxnstoich;
vector<char> participants(kin.nTotalSpecies(), 0);
for (size_t nn = 0; nn < rdata.reactants.size(); nn++) {
rxnstoich[-1 - int(rdata.reactants[nn])] -= rdata.rstoich[nn];
participants[rdata.reactants[nn]] += 1;
}
for (size_t nn = 0; nn < rdata.products.size(); nn++) {
rxnstoich[int(rdata.products[nn])+1] += rdata.pstoich[nn];
participants[rdata.products[nn]] += 2;
}
vector<size_t>& related = m_participants[participants];
for (size_t mm = 0; mm < related.size(); mm++) {
size_t nn = related[mm];
if ((rdata.reactants.size() == m_nr[nn])
&& (rdata.reactionType == m_typ[nn])) {
doublereal c = isDuplicateReaction(rxnstoich, m_rdata[nn]);
if (c > 0.0
|| (c < 0.0 && rdata.reversible)
|| (c < 0.0 && m_rev[nn])) {
if ((!dup || !m_dup[nn])) {
string msg = string("Undeclared duplicate reactions detected: \n")
+"Reaction "+int2str(nn+1)+": "+m_eqn[nn]
+"\nReaction "+int2str(iRxn+1)+": "+eqn+"\n";
throw CanteraError("installReaction", msg);
}
}
}
}
m_dup.push_back(dup);
m_rev.push_back(rdata.reversible);
m_eqn.push_back(eqn);
m_nr.push_back(rdata.reactants.size());
m_typ.push_back(rdata.reactionType);
m_rdata.push_back(rxnstoich);
m_participants[participants].push_back(m_rdata.size() - 1);
}
rdata.equation = eqn;
rdata.number = iRxn;
rdata.rxn_number = iRxn;
// Read the rate coefficient data from the XML file. Trigger an
// exception for negative A unless specifically authorized.
getRateCoefficient(r.child("rateCoeff"), kin, rdata, rules);
// Check to see that the elements balance in the reaction.
// Throw an error if they don't
if (validate_rxn) {
checkRxnElementBalance(kin, rdata);
}
// Ok we have read everything in about the reaction. Add it to the
// kinetics object by calling the Kinetics member function addReaction()
kin.addReaction(rdata);
return true;
}
/*
* Take information from the XML tree, p, about reactions
* and install them into the kinetics object, kin.
* default_phase is the default phase to assume when
* looking up species.
*
* At this point, p usually refers to the phase xml element.
* One of the children of this element is reactionArray,
* the element which determines where in the xml file to
* look up the reaction rate data pertaining to the phase.
*
* On return, if reaction instantiation goes correctly, return true.
* If there is a problem, return false.
*/
bool installReactionArrays(const XML_Node& p, Kinetics& kin,
std::string default_phase, bool check_for_duplicates)
{
const std::auto_ptr<rxninfo> _rxns(new rxninfo);
vector<XML_Node*> rarrays;
int itot = 0;
/*
* Search the children of the phase element for the
* xml element named reactionArray. If we can't find it,
* then return signaling having not found any reactions.
* Apparently, we allow multiple reactionArray elements here
* Each one will be processed sequentially, with the
* end result being purely additive.
*/
p.getChildren("reactionArray",rarrays);
int na = static_cast<int>(rarrays.size());
if (na == 0) {
kin.finalize();
return false;
}
for (int n = 0; n < na; n++) {
/*
* Go get a reference to the current xml element,
* reactionArray. We will process this element now.
*/
const XML_Node& rxns = *rarrays[n];
/*
* The reactionArray element has an attribute called,
* datasrc. The value of the attribute is the xml
* element comprising the top of the
* tree of reactions for the phase.
* Find this datasrc element starting with the root
* of the current xml node.
*/
const XML_Node* rdata = get_XML_Node(rxns["datasrc"], &rxns.root());
/*
* If the reactionArray element has a child element named "skip", and
* if the attribute of skip called "species" has a value of "undeclared",
* we will set rxnrule.skipUndeclaredSpecies to 'true'. rxnrule is
* passed to the routine that parses each individual reaction so that
* the parser will skip all reactions containing an undefined species
* without throwing an error.
*
* Similarly, an attribute named "third_bodies" with the value of
* "undeclared" will skip undeclared third body efficiencies (while
* retaining the reaction and any other efficiencies).
*/
ReactionRules rxnrule;
if (rxns.hasChild("skip")) {
const XML_Node& sk = rxns.child("skip");
string sskip = sk["species"];
if (sskip == "undeclared") {
rxnrule.skipUndeclaredSpecies = true;
}
if (sk["third_bodies"] == "undeclared") {
rxnrule.skipUndeclaredThirdBodies = true;
}
}
int i, nrxns = 0;
/*
* Search for child elements called include. We only include
* a reaction if it's tagged by one of the include fields.
* Or, we include all reactions if there are no include fields.
*/
vector<XML_Node*> incl;
rxns.getChildren("include",incl);
int ninc = static_cast<int>(incl.size());
vector<XML_Node*> allrxns;
rdata->getChildren("reaction",allrxns);
nrxns = static_cast<int>(allrxns.size());
// if no 'include' directive, then include all reactions
if (ninc == 0) {
for (i = 0; i < nrxns; i++) {
const XML_Node* r = allrxns[i];
if (r) {
if (_rxns->installReaction(itot, *r, kin,
default_phase, rxnrule, check_for_duplicates)) {
++itot;
}
}
}
} else {
for (int nii = 0; nii < ninc; nii++) {
const XML_Node& ii = *incl[nii];
string imin = ii["min"];
string imax = ii["max"];
string::size_type iwild = string::npos;
if (imax == imin) {
iwild = imin.find("*");
if (iwild != string::npos) {
imin = imin.substr(0,iwild);
imax = imin;
}
}
for (i = 0; i < nrxns; i++) {
const XML_Node* r = allrxns[i];
string rxid;
if (r) {
rxid = (*r)["id"];
if (iwild != string::npos) {
rxid = rxid.substr(0,iwild);
}
/*
* To decide whether the reaction is included or not
* we do a lexical min max and operation. This
* sometimes has surprising results.
*/
if ((rxid >= imin) && (rxid <= imax)) {
if (_rxns->installReaction(itot, *r, kin,
default_phase, rxnrule, check_for_duplicates)) {
++itot;
}
}
}
}
}
}
}
/*
* Finalize the installation of the kinetics, now that we know
* the true number of reactions in the mechanism, itot.
*/
kin.finalize();
return true;
}
/*
* Import a reaction mechanism for a phase or an interface.
*
* @param phase This is an xml node containing a description
* of a phase. Within the phase is a XML element
* called reactionArray containing the location
* of the description of the reactions that make
* up the kinetics object.
* Also within the phase is an XML element called
* phaseArray containing a listing of other phases
* that participate in the kinetics mechanism.
*
* @param th This is a list of ThermoPhase pointers which must
* include all of
* the phases that participate in the kinetics
* operator. All of the phases must have already
* been initialized and formed within Cantera.
* However, their pointers should not have been
* added to the Kinetics object; this addition
* is carried out here. Additional phases may
* be include; these have no effect.
*
* @param k This is a pointer to the kinetics manager class
* that will be initialized with a kinetics
* mechanism.
*/
bool importKinetics(const XML_Node& phase, std::vector<ThermoPhase*> th,
Kinetics* k)
{
if (k == 0) {
return false;
}
Kinetics& kin = *k;
// This phase will be the owning phase for the kinetics operator
// For interfaces, it is the surface phase between two volumes.
// For homogeneous kinetics, it's the current volumetric phase.
string owning_phase = phase["id"];
bool check_for_duplicates = false;
if (phase.parent()->hasChild("validate")) {
const XML_Node& d = phase.parent()->child("validate");
if (d["reactions"] == "yes") {
check_for_duplicates = true;
}
}
// if other phases are involved in the reaction mechanism,
// they must be listed in a 'phaseArray' child
// element. Homogeneous mechanisms do not need to include a
// phaseArray element.
vector<string> phase_ids;
if (phase.hasChild("phaseArray")) {
const XML_Node& pa = phase.child("phaseArray");
getStringArray(pa, phase_ids);
}
phase_ids.push_back(owning_phase);
int np = static_cast<int>(phase_ids.size());
int nt = static_cast<int>(th.size());
// for each referenced phase, attempt to find its id among those
// phases specified.
bool phase_ok;
string phase_id;
string msg = "";
for (int n = 0; n < np; n++) {
phase_id = phase_ids[n];
phase_ok = false;
// loop over the supplied 'ThermoPhase' objects representing
// phases, to find an object with the same id.
for (int m = 0; m < nt; m++) {
if (th[m]->id() == phase_id) {
phase_ok = true;
// if no phase with this id has been added to
//the kinetics manager yet, then add this one
if (kin.phaseIndex(phase_id) == npos) {
kin.addPhase(*th[m]);
}
}
msg += " "+th[m]->id();
}
if (!phase_ok) {
throw CanteraError("importKinetics",
"phase "+phase_id+" not found. Supplied phases are:"+msg);
}
}
// allocates arrays, etc. Must be called after the phases have
// been added to 'kin', so that the number of species in each
// phase is known.
kin.init();
// Install the reactions.
return installReactionArrays(phase, kin, owning_phase, check_for_duplicates);
}
/*
* Build a single-phase ThermoPhase object with associated kinetics
* mechanism.
*/
bool buildSolutionFromXML(XML_Node& root, const std::string& id,
const std::string& nm, ThermoPhase* th, Kinetics* k)
{
XML_Node* x;
x = get_XML_NameID(nm, string("#")+id, &root);
// x = get_XML_Node(string("#")+id, &root);
if (!x) {
return false;
}
/*
* Fill in the ThermoPhase object by querying the
* const XML_Node tree located at x.
*/
importPhase(*x, th);
/*
* Create a vector of ThermoPhase pointers of length 1
* having the current th ThermoPhase as the entry.
*/
vector<ThermoPhase*> phases(1);
phases[0] = th;
/*
* Fill in the kinetics object k, by querying the
* const XML_Node tree located by x. The source terms and
* eventually the source term vector will be constructed
* from the list of ThermoPhases in the vector, phases.
*/
importKinetics(*x, phases, k);
return true;
}
}
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