compiling dummy constant transport class

include/cantera/transport/ConstantTransport.h

@@ -0,0 +1,88 @@
+/**
+ *  @file ConstantTransport.h
+ *    Headers for the ConstantTransport object, which models transport
+ *    properties in ideal gas solutions using the unity Lewis number
+ *    approximation
+ *    (see \ref tranprops and \link Cantera::ConstantTransport ConstantTransport \endlink) .
+ */
+
+// This file is part of Cantera. See License.txt in the top-level directory or
+// at https://cantera.org/license.txt for license and copyright information.
+
+#ifndef CT_CONSTANTTRAN_H
+#define CT_CONSTANTTRAN_H
+
+#include "MixTransport.h"
+
+namespace Cantera
+{
+//! Class ConstantTransport implements the unity Lewis number approximation
+//! for the mixture-averaged species diffusion coefficients. Mixture-averaged
+//! transport properties for viscosity and thermal conductivity are inherited
+//! from the MixTransport class.
+//! @ingroup tranprops
+class ConstantTransport : public MixTransport
+{
+public:
+//    ConstantTransport() {}
+
+    virtual std::string transportType() const {
+        return "Constant";
+    }
+
+    //! Returns the unity Lewis number approximation based diffusion
+    //! coefficients [m^2/s].
+    /*!
+     * Returns the unity Lewis number approximation based diffusion coefficients
+     * for a gas, appropriate for calculating the mass averaged diffusive flux
+     * with respect to the mass averaged velocity using gradients of the mole
+     * fraction.
+     *
+     * \f[
+     *     D^\prime_{km} = \frac{\lambda}{\rho c_p}
+     * \f]
+     *
+     * In order to obtain the expected behavior from a unity Lewis number model,
+     * this formulation requires that the correction velocity be computed as
+     *
+     * \f[
+     *     V_c = \sum \frac{W_k}{\overline{W}} D^\prime_{km} \nabla X_k
+     * \f]
+     *
+     * @param[out] d  Vector of diffusion coefficients for each species (m^2/s).
+     * length m_nsp.
+     */
+    virtual void getMixDiffCoeffs(double* const d) {
+        double Dm = thermalConductivity() / (m_thermo->density() * m_thermo->cp_mass());
+        for (size_t k = 0; k < m_nsp; k++) {
+            d[k] = Dm;
+        }
+    }
+
+    //! Not implemented for unity Lewis number approximation
+    virtual void getMixDiffCoeffsMole(double* const d){
+        throw NotImplementedError("ConstantTransport::getMixDiffCoeffsMole");
+    }
+
+    //! Returns the unity Lewis number approximation based diffusion
+    //! coefficients [m^2/s].
+    /*!
+     * These are the coefficients for calculating the diffusive mass fluxes
+     * from the species mass fraction gradients, computed as
+     *
+     * \f[
+     *     D_{km} = \frac{\lambda}{\rho c_p}
+     * \f]
+     *
+     * @param[out] d  Vector of diffusion coefficients for each species (m^2/s).
+     * length m_nsp.
+     */
+    virtual void getMixDiffCoeffsMass(double* const d){
+        double Dm = thermalConductivity() / (m_thermo->density() * m_thermo->cp_mass());
+        for (size_t k = 0; k < m_nsp; k++) {
+            d[k] = Dm;
+        }
+    }
+};
+}
+#endif

src/transport/TransportFactory.cpp

@@ -7,6 +7,7 @@
 #include "cantera/transport/MultiTransport.h"
 #include "cantera/transport/MixTransport.h"
 #include "cantera/transport/UnityLewisTransport.h"
+#include "cantera/transport/ConstantTransport.h"
 #include "cantera/transport/IonGasTransport.h"
 #include "cantera/transport/WaterTransport.h"
 #include "cantera/transport/DustyGasTransport.h"
@@ -45,6 +46,8 @@ TransportFactory::TransportFactory()
 {
     reg("", []() { return new Transport(); });
     m_synonyms["None"] = "";
+    reg("Constant", []() { return new ConstantTransport(); });
+    m_synonyms["constant"] = "Constant";
     reg("UnityLewis", []() { return new UnityLewisTransport(); });
     m_synonyms["unity-Lewis-number"] = "UnityLewis";
     reg("Mix", []() { return new MixTransport(); });