From: Timo Heister Date: Fri, 31 May 2024 03:22:41 +0000 (-0400) Subject: document VectorTools::no_normal_flux_constraints X-Git-Tag: v9.6.0-rc1~214^2 X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F17086%2Fhead;p=dealii.git document VectorTools::no_normal_flux_constraints --- diff --git a/include/deal.II/numerics/vector_tools_constraints.h b/include/deal.II/numerics/vector_tools_constraints.h index 33e683e135..9f685757a3 100644 --- a/include/deal.II/numerics/vector_tools_constraints.h +++ b/include/deal.II/numerics/vector_tools_constraints.h @@ -50,9 +50,6 @@ namespace VectorTools * i.e., normal flux constraints where $\vec u$ is a vector-valued solution * variable and $\vec u_\Gamma$ is a prescribed vector field whose normal * component we want to be equal to the normal component of the solution. - * This function can also be used on level meshes in the multigrid method - * if @p refinement_edge_indices and @p level are provided, and the former - * can be obtained by MGConstrainedDoFs::get_refinement_edge_indices(). * These conditions have exactly the form handled by the * AffineConstraints class, in that they relate a linear * combination of boundary degrees of freedom to a corresponding @@ -114,9 +111,9 @@ namespace VectorTools * Each function in @p function_map is expected to have @p dim * components, which are used independent of @p first_vector_component. * - * The mapping argument is used to compute the boundary points at which the - * function needs to request the normal vector $\vec n$ from the boundary - * description. + * The mapping argument is used to compute the location of points on the + * boundary at which the function needs to request the normal vector + * $\vec n$ from the Manifold description. * * @note When combining adaptively refined meshes with hanging node * constraints and boundary conditions like from the current function within @@ -334,9 +331,10 @@ namespace VectorTools * information), but for the simpler case of homogeneous normal-flux * constraints, i.e., for imposing the condition * $\vec u \cdot \vec n= 0$. This function is used in step-31 and step-32. - * This function can also be used on level meshes in the multigrid method - * if @p refinement_edge_indices and @p level are provided, and the former - * can be obtained by MGConstrainedDoFs::get_refinement_edge_indices(). + * + * To compute no normal-flux constraints for a specific multigrid level for + * the geometric multigrid method, see + * compute_no_normal_flux_constraints_on_level(). * * @ingroup constraints * @@ -361,8 +359,15 @@ namespace VectorTools /** * This function does the same as - * compute_no_normal_flux_constraints(), but for the case of multigrid - * levels. + * compute_no_normal_flux_constraints(), but for the case of geometric + * multigrid on the specified @p level. The @p refinement_edge_indices + * can be obtained by MGConstrainedDoFs::get_refinement_edge_indices() + * and should contain all indices of DoFs that are on refinement edges + * of the adaptively refined mesh. + * + * Also see compute_nonzero_normal_flux_constraints() for a detailed + * description about the implementation of this routine. + * * @ingroup constraints * * @see