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comparison src/SbpOperators/volumeops/derivatives/second_derivative_variable.jl @ 2080:0f949681d3d3 refactor/sbp_operators/direction_check tip

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Check that direction of first/second derivative operators is within the dimension of the grid. Add 1D functions for first/second derivative operators that take a direction.
author Vidar Stiernström <vidar.stiernstrom@gmail.com>
date Fri, 20 Feb 2026 12:01:05 +0100
parents e9dfc1998d31
children
comparison
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2079:118c09b168f5 2080:0f949681d3d3
7 Approximates the d/dξ c d/dξ on `g` along the coordinate dimension specified 7 Approximates the d/dξ c d/dξ on `g` along the coordinate dimension specified
8 by `direction`. 8 by `direction`.
9 """ 9 """
10 function second_derivative_variable end 10 function second_derivative_variable end
11 11
12 function second_derivative_variable(g::TensorGrid, coeff, stencil_set, dir::Int) 12 function second_derivative_variable(g::TensorGrid, coeff, stencil_set, direction::Int)
13 if direction ∉ Interval(0, ndims(g))
14 throw(DomainError(direction, "Direction must be inside [0, $(ndims(g))]."))
15 end
13 inner_stencil = parse_nested_stencil(eltype(coeff), stencil_set["D2variable"]["inner_stencil"]) 16 inner_stencil = parse_nested_stencil(eltype(coeff), stencil_set["D2variable"]["inner_stencil"])
14 closure_stencils = parse_nested_stencil.(eltype(coeff), stencil_set["D2variable"]["closure_stencils"]) 17 closure_stencils = parse_nested_stencil.(eltype(coeff), stencil_set["D2variable"]["closure_stencils"])
15 18
16 return second_derivative_variable(g, coeff, inner_stencil, closure_stencils, dir) 19 return second_derivative_variable(g, coeff, inner_stencil, closure_stencils, direction)
20 end
21
22 function second_derivative_variable(g::EquidistantGrid, coeff, stencil_set, direction)
23 return second_derivative_variable(TensorGrid(g), coeff, stencil_set, direction)
17 end 24 end
18 25
19 function second_derivative_variable(g::EquidistantGrid, coeff, stencil_set) 26 function second_derivative_variable(g::EquidistantGrid, coeff, stencil_set)
20 return second_derivative_variable(TensorGrid(g), coeff, stencil_set, 1) 27 return second_derivative_variable(g::EquidistantGrid, coeff, stencil_set, 1)
21 end 28 end
22 29
23 function second_derivative_variable(g::TensorGrid, coeff, inner_stencil::NestedStencil, closure_stencils, dir) 30 function second_derivative_variable(g::TensorGrid, coeff, inner_stencil::NestedStencil, closure_stencils, direction)
24 check_coefficient(g, coeff) 31 check_coefficient(g, coeff)
25 32
26 Δxᵢ = spacing(g.grids[dir]) 33 Δxᵢ = spacing(g.grids[direction])
27 scaled_inner_stencil = scale(inner_stencil, 1/Δxᵢ^2) 34 scaled_inner_stencil = scale(inner_stencil, 1/Δxᵢ^2)
28 scaled_closure_stencils = scale.(Tuple(closure_stencils), 1/Δxᵢ^2) 35 scaled_closure_stencils = scale.(Tuple(closure_stencils), 1/Δxᵢ^2)
29 return SecondDerivativeVariable(coeff, scaled_inner_stencil, scaled_closure_stencils, dir) 36 return SecondDerivativeVariable(coeff, scaled_inner_stencil, scaled_closure_stencils, direction)
30 end 37 end
31 38
32 function check_coefficient(g, coeff) 39 function check_coefficient(g, coeff)
33 if ndims(g) != ndims(coeff) 40 if ndims(g) != ndims(coeff)
34 throw(ArgumentError("The coefficient has dimension $(ndims(coeff)) while the grid is dimension $(ndims(g))")) 41 throw(ArgumentError("The coefficient has dimension $(ndims(coeff)) while the grid is dimension $(ndims(g))"))