Third law of thermodynamics: Equilibrium at rest

[miguelmaso]

The constitutive models with failing tests are not satisfying the third law of thermodynamics...

[github-actions]

Benchmark Results (Julia v1)

Time benchmarks

	main	2c4863c...	main / 2c4863c...
Constitutive models/Visco-elastic Ψ	0.0515 ± 0.021 ms	0.0508 ± 0.021 ms	1.01 ± 0.59
Constitutive models/Visco-elastic ∂Ψu	0.0639 ± 0.014 ms	0.0636 ± 0.013 ms	1 ± 0.3
Constitutive models/Visco-elastic ∂Ψuu	0.114 ± 0.037 ms	0.114 ± 0.02 ms	1 ± 0.37
Simulations/StaticMechanicalDirichlet	0.254 ± 0.017 s	0.248 ± 0.013 s	1.02 ± 0.088
Simulations/StaticMechanicalNeumann	0.176 ± 0.016 s	0.179 ± 0.012 s	0.986 ± 0.11
Simulations/ViscoElastic	8.69 s	8.61 s	1.01
Tensor algebra/Cofactor	0.063 ± 0.003 μs	0.064 ± 0.002 μs	0.984 ± 0.056
Tensor algebra/Det(A)Inv(A')	0.125 ± 0.005 μs	0.126 ± 0.005 μs	0.992 ± 0.056
Tensor algebra/δδ_λ_2d	19 ± 1 ns	19 ± 1 ns	1 ± 0.074
Tensor algebra/δδ_μ_2d	19 ± 1 ns	18 ± 1 ns	1.06 ± 0.081
time_to_load	2.39 ± 0.011 s	2.37 ± 0.016 s	1.01 ± 0.0082

Memory benchmarks

	main	2c4863c...	main / 2c4863c...
Constitutive models/Visco-elastic Ψ	1.25 k allocs: 0.0794 MB	1.25 k allocs: 0.0794 MB	1
Constitutive models/Visco-elastic ∂Ψu	1.37 k allocs: 0.0917 MB	1.37 k allocs: 0.0917 MB	1
Constitutive models/Visco-elastic ∂Ψuu	2.31 k allocs: 0.158 MB	2.31 k allocs: 0.158 MB	1
Simulations/StaticMechanicalDirichlet	1.7 M allocs: 0.118 GB	1.7 M allocs: 0.118 GB	1
Simulations/StaticMechanicalNeumann	1.43 M allocs: 0.0908 GB	1.43 M allocs: 0.0908 GB	1
Simulations/ViscoElastic	0.128 G allocs: 8.3 GB	0.128 G allocs: 8.3 GB	1
Tensor algebra/Cofactor	1 allocs: 0.0781 kB	1 allocs: 0.0781 kB	1
Tensor algebra/Det(A)Inv(A')	4 allocs: 0.25 kB	4 allocs: 0.25 kB	1
Tensor algebra/δδ_λ_2d	0 allocs: 0 B	0 allocs: 0 B
Tensor algebra/δδ_μ_2d	0 allocs: 0 B	0 allocs: 0 B
time_to_load	0.149 k allocs: 11.1 kB	0.149 k allocs: 11.1 kB	1