Merge pull request #12811 from gfcas/doc_step_72

Correction of comments in step-72
dealii · Oct 18, 2021 · 24e77b9 · 24e77b9
2 parents f0d1c24 + d1aa45e
commit 24e77b9
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Showing 3 changed files with 10 additions and 9 deletions.
diff --git a/examples/step-15/step-15.cc b/examples/step-15/step-15.cc
@@ -288,7 +288,7 @@ namespace Step15
 
                 cell_rhs(i) -= (fe_values.shape_grad(i, q)  // \nabla \phi_i
                                 * coeff                     // * a_n
-                                * old_solution_gradients[q] // * u_n
+                                * old_solution_gradients[q] // * \nabla u_n
                                 * fe_values.JxW(q));        // * dx
               }
           }
@@ -534,7 +534,7 @@ namespace Step15
             for (unsigned int i = 0; i < dofs_per_cell; ++i)
               cell_residual(i) -= (fe_values.shape_grad(i, q) // \nabla \phi_i
                                    * coeff                    // * a_n
-                                   * gradients[q]             // * u_n
+                                   * gradients[q]             // * \nabla u_n
                                    * fe_values.JxW(q));       // * dx
           }
 

diff --git a/examples/step-72/step-72.cc b/examples/step-72/step-72.cc
@@ -367,7 +367,7 @@ namespace Step72
 
               cell_rhs(i) -= (fe_values.shape_grad(i, q)  // \nabla \phi_i
                               * coeff                     // * a_n
-                              * old_solution_gradients[q] // * u_n
+                              * old_solution_gradients[q] // * \nabla u_n
                               * fe_values.JxW(q));        // * dx
             }
         }
@@ -587,7 +587,7 @@ namespace Step72
             {
               residual_ad[i] += (fe_values.shape_grad(i, q)   // \nabla \phi_i
                                  * coeff                      // * a_n
-                                 * old_solution_gradients[q]) // * u_n
+                                 * old_solution_gradients[q]) // * \nabla u_n
                                 * fe_values.JxW(q);           // * dx
             }
         }
@@ -948,7 +948,7 @@ namespace Step72
             for (unsigned int i = 0; i < dofs_per_cell; ++i)
               cell_residual(i) -= (fe_values.shape_grad(i, q) // \nabla \phi_i
                                    * coeff                    // * a_n
-                                   * gradients[q]             // * u_n
+                                   * gradients[q]             // * \nabla u_n
                                    * fe_values.JxW(q));       // * dx
           }
 

diff --git a/examples/step-77/step-77.cc b/examples/step-77/step-77.cc
@@ -364,10 +364,11 @@ namespace Step77
                                     evaluation_point_gradients[q]);
 
             for (unsigned int i = 0; i < dofs_per_cell; ++i)
-              cell_residual(i) = (fe_values.shape_grad(i, q) // \nabla \phi_i
-                                  * coeff                    // * a_n
-                                  * evaluation_point_gradients[q] // * u_n
-                                  * fe_values.JxW(q));            // * dx
+              cell_residual(i) =
+                (fe_values.shape_grad(i, q)      // \nabla \phi_i
+                 * coeff                         // * a_n
+                 * evaluation_point_gradients[q] // * \nabla u_n
+                 * fe_values.JxW(q));            // * dx
           }
 
         cell->get_dof_indices(local_dof_indices);