relative diffusive flux correction

Former-commit-id: 71e659b
chaos-polymtl · Dec 18, 2023 · 6ecf9fc · 6ecf9fc
1 parent 3101563
commit 6ecf9fc
Showing 1 changed file with 11 additions and 8 deletions.
diff --git a/source/solvers/navier_stokes_cahn_hilliard_assemblers.cc b/source/solvers/navier_stokes_cahn_hilliard_assemblers.cc
@@ -113,9 +113,11 @@ GLSNavierStokesCahnHilliardAssemblerCore<dim>::assemble_matrix(
       // Calculate the strong residual for GLS stabilization
       auto strong_residual =
         density_eq * velocity_gradient * velocity + pressure_gradient -
-        dynamic_viscosity_eq * velocity_laplacian -
-        dynamic_viscosity_eq * grad_div_velocity - density_eq * force -
-        relative_diffusive_flux * velocity_gradient -
+        dynamic_viscosity_eq * velocity_laplacian
+        //- dynamic_viscosity_eq * grad_div_velocity
+        - density_eq * force -
+        velocity_gradient * relative_diffusive_flux  - // Multiplier par la gauche le velocity gradient car le gradient
+                                                       // en deal.ii correspond au gradient mathematique
         curvature_cahn_hilliard * potential_value * phase_order_gradient +
         strong_residual_vec[q];
 
@@ -182,7 +184,7 @@ GLSNavierStokesCahnHilliardAssemblerCore<dim>::assemble_matrix(
                 // Continuity terms
                 phi_p_i * div_phi_u_j
                 // Relative diffusive flux term
-                - relative_diffusive_flux * grad_phi_u_j * phi_u_i;
+                -  grad_phi_u_j * relative_diffusive_flux  * phi_u_i;
 
               // PSPG GLS Term
               local_matrix_ij += tau / density_eq * (strong_jac * grad_phi_p_i);
@@ -311,9 +313,10 @@ GLSNavierStokesCahnHilliardAssemblerCore<dim>::assemble_rhs(
 
       auto strong_residual =
         density_eq * velocity_gradient * velocity + pressure_gradient -
-        dynamic_viscosity_eq * velocity_laplacian -
-        dynamic_viscosity_eq * grad_div_velocity - density_eq * force -
-        relative_diffusive_flux * velocity_gradient -
+        dynamic_viscosity_eq * velocity_laplacian
+        //- dynamic_viscosity_eq * grad_div_velocity
+        - density_eq * force -
+         velocity_gradient * relative_diffusive_flux  -
         curvature_cahn_hilliard * potential_value * phase_order_gradient +
         strong_residual_vec[q];
 
@@ -338,7 +341,7 @@ GLSNavierStokesCahnHilliardAssemblerCore<dim>::assemble_rhs(
              // Continuity equation
              - velocity_divergence * phi_p_i
              // Relative diffusive flux term (Cahn-Hilliard)
-             + relative_diffusive_flux * velocity_gradient * phi_u_i
+             + velocity_gradient * relative_diffusive_flux  * phi_u_i
              // Surface tension term (Cahn-Hilliard)
              + curvature_cahn_hilliard * potential_value *
                  phase_order_gradient * phi_u_i) *