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turbulent diffusivity simply added

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This commit is contained in:
ignis 2020-04-22 13:58:28 +09:00
parent 5e1fafa9c7
commit 48844d3f12
2 changed files with 31 additions and 32 deletions
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53
include/cantera/transport/TurbulentTransport.h
View file

@ -32,6 +32,27 @@ public:
virtual void init(thermo_t* thermo, int mode=0, int log_level=0);
//! Returns the mixture thermal conductivity (W/m /K)
/*!
* The thermal conductivity is computed from the following mixture rule:
* \f[
* \lambda = 0.5 \left( \sum_k X_k \lambda_k + \frac{1}{\sum_k X_k/\lambda_k} \right)
* \f]
*
* It's used to compute the flux of energy due to a thermal gradient
*
* \f[
* j_T = - \lambda \nabla T
* \f]
*
* The flux of energy has units of energy (kg m2 /s2) per second per area.
*
* The units of lambda are W / m K which is equivalent to kg m / s^3 K.
*
* @returns the mixture thermal conductivity, with units of W/m/K
*/
virtual doublereal thermalConductivity();
//! Returns the unity Lewis number approximation based diffusion
//! coefficients [m^2/s].
/*!
@ -57,22 +78,8 @@ public:
virtual void getMixDiffCoeffs(double* const d) {
GasTransport::getMixDiffCoeffs(d);
doublereal t = m_thermo->temperature();
doublereal slope = (-(m_turbmodifier-1.0)/m_profwidth);
doublereal trans = slope*(t-m_rdlayerstart) + 1.0;
double Dm = thermalConductivity() / (m_thermo->density() * m_thermo->cp_mass());
if (t < m_rdlayerstart - m_profwidth) {
Dm *= m_turbmodifier;
} else if (t > m_rdlayerstart) {
Dm *= 1.0;
} else {
Dm *= trans;
}
for (size_t k = 0; k < m_nsp; k++) {
d[k] = Dm;
d[k] += m_turbmodifier;
}
}
@ -97,22 +104,8 @@ public:
virtual void getMixDiffCoeffsMass(double* const d){
GasTransport::getMixDiffCoeffsMass(d);
doublereal t = m_thermo->temperature();
doublereal slope = (-(m_turbmodifier-1.0)/m_profwidth);
doublereal trans = slope*(t-m_rdlayerstart) + 1.0;
double Dm = thermalConductivity() / (m_thermo->density() * m_thermo->cp_mass());
if (t < m_rdlayerstart - m_profwidth) {
Dm *= m_turbmodifier;
} else if (t > m_rdlayerstart) {
Dm *= 1.0;
} else {
Dm *= trans;
}
for (size_t k = 0; k < m_nsp; k++) {
d[k] = Dm;
d[k] += m_turbmodifier;
}
}

10
src/transport/TurbulentTransport.cpp
View file

@ -29,12 +29,18 @@ void TurbulentTransport::init(ThermoPhase* thermo, int mode, int log_level)
myfile.open ("turbulent-coefs.txt");
myfile >> m_turbmodifier;
myfile >> m_profwidth;
myfile >> m_rdlayerstart;
myfile.close();
// m_reftemp = thermo->temperature();
// cout << "check reference temperature" << m_reftemp << endl;
}
doublereal TurbulentTransport::thermalConductivity()
{
MixTransport::thermalConductivity();
m_lambda += m_turbmodifier;
m_condmix_ok = true;
return m_lambda;
}
}