From 0f97b0063c0d3d5e278996bbf81963413e48484e Mon Sep 17 00:00:00 2001 From: Wolfgang Bangerth Date: Sat, 27 Feb 2016 14:05:29 -0600 Subject: [PATCH] Update docs in a couple of places. --- include/deal.II/numerics/vector_tools.h | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-) diff --git a/include/deal.II/numerics/vector_tools.h b/include/deal.II/numerics/vector_tools.h index 3203daec37..e7dcca2b9b 100644 --- a/include/deal.II/numerics/vector_tools.h +++ b/include/deal.II/numerics/vector_tools.h @@ -1325,7 +1325,9 @@ namespace VectorTools /** * This function computes the constraints that correspond to boundary * conditions of the form $\vec u \cdot \vec n=\vec u_\Gamma \cdot \vec n$, - * i.e. normal flux constraints if $\vec u$ is a vector-valued quantity. + * 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. * These conditions have exactly the form handled by the ConstraintMatrix * class, so instead of creating a map between boundary degrees of freedom * and corresponding value, we here create a list of constraints that are @@ -1539,7 +1541,8 @@ namespace VectorTools const Mapping &mapping = StaticMappingQ1::mapping); /** - * Same as above for homogeneous normal-flux constraints. + * Same as above for homogeneous normal-flux constraints, i.e., for + * imposing the condition $\vec u \cdot \vec n= 0$. * * @ingroup constraints * @@ -1557,12 +1560,14 @@ namespace VectorTools /** * Compute the constraints that correspond to boundary conditions of the - * form $\vec u \times \vec n=\vec u_\Gamma \times \vec n$, i.e. tangential - * flow constraints if $\vec u$ is a vector-valued quantity. This function - * constrains exactly those vector-valued components that are left - * unconstrained by compute_no_normal_flux_constraints, and leaves the one - * component unconstrained that is constrained by - * compute_no_normal_flux_constraints. + * form $\vec u \times \vec n=\vec u_\Gamma \times \vec n$, i.e., tangential + * flow constraints where $\vec u$ is a vector-valued solution + * variable and $\vec u_\Gamma$ is prescribed vector field whose tangential + * component(s) we want to be equal to the tangential component(s) of the + * solution. This function constrains exactly those dim-1 vector-valued + * components that are left unconstrained by + * VectorTools::compute_no_normal_flux_constraints(), and leaves the one + * component unconstrained that is constrained by that function. * * @ingroup constraints * -- 2.39.5