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This commit is contained in:
Harry Moffat 2010-08-19 00:30:18 +00:00
parent 6d766926bd
commit 4ec5327086
2 changed files with 32 additions and 8 deletions
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14
Cantera/src/transport/DustyGasTransport.cpp
View file

@ -53,7 +53,6 @@ namespace Cantera {
m_gradP(0.0),
m_knudsen_ok(false),
m_bulk_ok(false),
m_conc_set(false),
m_gradConc_set(false),
m_gradP_set(false),
m_porosity(0.0),
@ -79,7 +78,6 @@ namespace Cantera {
m_gradP(0.0),
m_knudsen_ok(false),
m_bulk_ok(false),
m_conc_set(false),
m_gradConc_set(false),
m_gradP_set(false),
m_porosity(0.0),
@ -120,7 +118,6 @@ namespace Cantera {
m_gradP = right.m_gradP;
m_knudsen_ok = right.m_knudsen_ok;
m_bulk_ok= right.m_bulk_ok;
m_conc_set = right.m_conc_set;
m_gradConc_set = right.m_gradConc_set;
m_gradP_set = right.m_gradP_set;
m_porosity = right.m_porosity;
@ -204,7 +201,6 @@ namespace Cantera {
// set flags all false
m_knudsen_ok = false;
m_bulk_ok = false;
m_conc_set = false;
m_gradConc_set = false;
m_gradP_set = false;
@ -248,11 +244,17 @@ namespace Cantera {
for (k = 0; k < m_nsp; k++) {
// evaluate off-diagonal terms
for (l = 0; l < m_nsp; l++) m_multidiff(k,l) = -m_x[k]/m_d(k,l);
for (l = 0; l < m_nsp; l++) {
m_multidiff(k,l) = -m_x[k]/m_d(k,l);
}
// evaluate diagonal term
sum = 0.0;
for (j = 0; j < m_nsp; j++) if (j != k) sum += m_x[j]/m_d(k,j);
for (j = 0; j < m_nsp; j++) {
if (j != k) {
sum += m_x[j]/m_d(k,j);
}
}
m_multidiff(k,k) = 1.0/m_dk[k] + sum;
}
}

26
Cantera/src/transport/DustyGasTransport.h
View file

@ -189,12 +189,30 @@ namespace Cantera {
vector_fp m_x;
//! Knudsen diffusion coefficients
/*!
* The Knudsen diffusion coefficients are given by the following form
*
* \f[
* \mathcal{D}^{knud}_k = \frac{2}{3} \frac{r_{pore} \phi}{\tau} \left( \frac{8 R T}{\pi W_k} \right)^{1/2}
* \f]
*
*/
vector_fp m_dk;
//! temperature
doublereal m_temp;
//! multicomponent diffusion coefficients
//! Multicomponent diffusion coefficients
/*!
* The multicomponent diffusion matrix \f$ H_{k,l} \f$ is given by the following form
*
* \f[
* H_{k,l} = - \frac{X_k}{D_{k,l}}
* \f]
* \f[
* H_{k,k} = \frac{1}{\mathcal(D)^{knud}_{k}} + \sum_{j \ne k}^N{ \frac{X_j}{D_{k,j}} }
* \f]
*/
DenseMatrix m_multidiff;
//! work space of size m_nsp;
@ -207,10 +225,14 @@ namespace Cantera {
//! Pressure Gradient
doublereal m_gradP;
//! Update-to-date variable for Knudsen diffusion coefficients
bool m_knudsen_ok;
//! Update-to-date variable for Binary diffusion coefficients
bool m_bulk_ok;
bool m_conc_set;
bool m_gradConc_set;
bool m_gradP_set;
//! Porosity