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Jukka Aho
5b99a7a427
Introduce `MoistureDiffusivity` for scalar moisture transport kernels. - Declare physics traits and constant diffusion tensors/scalars as appropriate.
28 lines
907 B
Julia
28 lines
907 B
Julia
# SPDX-FileCopyrightText: 2015-2026 Jukka Aho
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# SPDX-License-Identifier: MIT
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"""
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Isotropic moisture diffusivity `D_w` for a scalar humidity/pore-water field
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[`MoistureContent`](@ref). The weak operator matches steady heat conduction
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(`HeatKernel` with [`Thermal`](@ref) physics).
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"""
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using Tensors
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struct MoistureDiffusivity <: AbstractMaterial
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D_w::Float64
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function MoistureDiffusivity(D_w::Float64)
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D_w > 0 || throw(ArgumentError("Moisture diffusivity D_w must be positive"))
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new(D_w)
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end
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end
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MoistureDiffusivity(; D_w::Real) = MoistureDiffusivity(Float64(D_w))
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material_behavior(::MoistureDiffusivity) = StatelessConstantTangent()
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supported_physics(::MoistureDiffusivity) = (Thermal{3}(),)
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@inline conductivity_tensor(m::MoistureDiffusivity) = m.D_w * one(SymmetricTensor{2,3,Float64,6})
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@inline scalar_diffusion_tensor(m::MoistureDiffusivity) = conductivity_tensor(m)
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