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comparison src/SbpOperators/boundaryops/normal_derivative.jl @ 936:22c80fb36400 feature/laplace_opset

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Fix docs and add some references
author Vidar Stiernström <vidar.stiernstrom@it.uu.se>
date Fri, 25 Feb 2022 17:20:40 +0100
parents d83f685f1031
children 38d1752a9aff
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935:079024db8226 936:22c80fb36400
4 Creates the normal derivative boundary operator `d` as a `TensorMapping` 4 Creates the normal derivative boundary operator `d` as a `TensorMapping`
5 5
6 `d` computes the normal derivative of a grid function on `boundary` a `Stencil` `closure_stencil`. 6 `d` computes the normal derivative of a grid function on `boundary` a `Stencil` `closure_stencil`.
7 `d'` is the prolongation of the normal derivative of a grid function to the whole grid using the same `closure_stencil`. 7 `d'` is the prolongation of the normal derivative of a grid function to the whole grid using the same `closure_stencil`.
8 On a one-dimensional `grid`, `d` is a `BoundaryOperator`. On a multi-dimensional `grid`, `d` is the inflation of 8 On a one-dimensional `grid`, `d` is a `BoundaryOperator`. On a multi-dimensional `grid`, `d` is the inflation of
9 a `BoundaryOperator`. See also [`SbpOperators.boundary_operator`](@ref). 9 a `BoundaryOperator`. See also [`boundary_operator`](@ref).
10 """ 10 """
11 function normal_derivative(grid, closure_stencil::Stencil, boundary) 11 function normal_derivative(grid, closure_stencil::Stencil, boundary)
12 direction = dim(boundary) 12 direction = dim(boundary)
13 h_inv = inverse_spacing(grid)[direction] 13 h_inv = inverse_spacing(grid)[direction]
14 return SbpOperators.boundary_operator(grid, scale(closure_stencil,h_inv), boundary) 14 return SbpOperators.boundary_operator(grid, scale(closure_stencil,h_inv), boundary)