fixing names according to review comment

Author: Cristopher-Morales

SU2_CFD/include/numerics/CNumerics.hpp

@@ -771,7 +771,7 @@ class CNumerics {
    * \param[in] val_jacheatfluxdiffusion - Value of the heat flux jacobian due to enthalpy diffusion.
    */
   inline void SetJacHeatFluxDiffusion(su2double val_jacheatfluxdiffusion) {
-    Jac_HeatFluxDiffusion = val_jac_heatfluxdiffusion;
+    JacHeatFluxDiffusion = val_jacheatfluxdiffusion;
   }
 
   /*!

SU2_CFD/src/numerics/flow/flow_diffusion.cpp

@@ -659,9 +659,9 @@ CNumerics::ResidualType<> CAvgGradInc_Flow::ComputeResidual(const CConfig* confi
       if (energy_multicomponent){
         Mean_Heat_Capacity = 0.5 * (V_i[nDim + 7] + V_j[nDim + 7]);
         Jacobian_i[nDim + 1][nDim + 1] =
-            -(Mean_Thermal_Conductivity * proj_vector_ij + Jac_HeatFluxDiffusion) / Mean_Heat_Capacity;
+            -(Mean_Thermal_Conductivity * proj_vector_ij + JacHeatFluxDiffusion) / Mean_Heat_Capacity;
         Jacobian_j[nDim + 1][nDim + 1] =
-            (Mean_Thermal_Conductivity * proj_vector_ij + Jac_HeatFluxDiffusion) / Mean_Heat_Capacity;
+            (Mean_Thermal_Conductivity * proj_vector_ij + JacHeatFluxDiffusion) / Mean_Heat_Capacity;
       } else {
         Jacobian_i[nDim + 1][nDim + 1] = -Mean_Thermal_Conductivity * proj_vector_ij;
         Jacobian_j[nDim + 1][nDim + 1] = Mean_Thermal_Conductivity * proj_vector_ij;

SU2_CFD/src/numerics/flow/flow_sources.cpp

@@ -337,7 +337,7 @@ CNumerics::ResidualType<> CSourceIncAxisymmetric_Flow::ComputeResidual(const CCo
       residual[3] -= Volume * yinv * Thermal_Conductivity_i * PrimVar_Grad_i[nDim + 1][1];
       if (multicomponent && energy) {
         residual[3] -= Volume * yinv * HeatFluxDiffusion;
-        if (implicit) jacobian[3][3] -= Volume * yinv * Jac_HeatFluxDiffusion / Cp_i;
+        if (implicit) jacobian[3][3] -= Volume * yinv * JacHeatFluxDiffusion / Cp_i;
       }
     }