mirror of
https://github.com/JuliaFEM/JuliaFEM.jl.git
synced 2026-09-09 20:43:33 +00:00
Jukka Aho
3ada6aa07d
Drop a duplicated example line and remove the commented-out Fluid placeholder
that suggested unfinished velocity dispatch.
- Clarify `Thermal{Dim}` wording; delete stale `Fluid{Dim}` sketch.
78 lines
2.2 KiB
Julia
78 lines
2.2 KiB
Julia
# This file is a part of JuliaFEM.
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# License is MIT: see https://github.com/JuliaFEM/JuliaFEM.jl/blob/master/LICENSE.md
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"""
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Physics category types for material trait dispatch.
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Defines abstract physics categories used for:
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- Material trait functions (required_field_type)
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- Material cache generation
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- Physics-based dispatch
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These are lower-level type tags, not complete FEM problems.
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"""
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"""
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Elasticity{Dim} <: AbstractPhysics
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Elasticity physics in Dim dimensions (2D or 3D).
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Used for trait-based dispatch to determine required fields:
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```julia
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required_field_type(Elasticity{3}()) # → Displacement{3}
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```
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"""
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struct Elasticity{Dim} <: AbstractPhysics end
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"""
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Thermal{Dim} <: AbstractPhysics
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Thermal physics (heat transfer) in `Dim` dimensions (2 or 3).
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Used for trait-based dispatch:
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```julia
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required_field_type(Thermal{2}()) # → Temperature (2D plane heat)
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required_field_type(Thermal{3}()) # → Temperature (3D heat)
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```
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"""
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struct Thermal{Dim} <: AbstractPhysics end
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# ============================================================================
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# TRAIT FUNCTIONS
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# ============================================================================
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"""
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required_field_type(physics::AbstractPhysics)
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Returns the field type required by the given physics.
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Used for compile-time inference of material cache structure and
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field requirements.
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# Examples
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```julia
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required_field_type(Elasticity{3}()) # → Displacement{3}
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required_field_type(Thermal{2}()) # → Temperature (2D)
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required_field_type(Thermal{3}()) # → Temperature (3D)
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```
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Materials can declare their physics requirements:
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```julia
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struct ThermoElasticMaterial <: AbstractMaterial
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# ...
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end
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# Material supports both elasticity and thermal physics
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supported_physics(::ThermoElasticMaterial) = (Elasticity{3}(), Thermal{3}())
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# System maps this to required field types:
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# Elasticity{3} → Displacement{3}
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# Thermal → Temperature
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```
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"""
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function required_field_type end
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required_field_type(::Elasticity{Dim}) where Dim = Displacement{Dim}
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required_field_type(::Thermal{Dim}) where Dim = Temperature
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# required_field_type(::Fluid{Dim}) where Dim = Velocity{Dim} # Add when Velocity field exists
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