Multiple instances of material properties

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modelman75
Posts: 11
Joined: 03 Oct 2020, 23:33
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Multiple instances of material properties

Post by modelman75 »

I notice that multiple instances of certain material properties occur in the sif file. In the snippet shown below, "Relative Permeability" occurs 4 times in both "Copper" (material 1) and "Air" (material 2) sections. "Relative Permittivity" occurs 2 times in the "Air" section. "Electric Conductivity" occurs 4 times in the "Copper" section. If I Manually delete multiple instances, they reoccur when the sif file is saved using ElmerGUI. Any comments as to why this happens?

Material 1
Name = "Copper (generic)"
Relative Permeability = 0.999994
Electric Conductivity = 59.59e6
Relative Permeability = 0.999994
Heat expansion Coefficient = 16.5e-6
Youngs modulus = 115.0e9
Heat Conductivity = 401.0
Relative Permeability = 0.999994
Poisson ratio = 0.34
Relative Permeability = 0.999994
Density = 8960.0
Electric Conductivity = 59.59e6
Mesh Poisson ratio = 0.34
Sound speed = 3810.0
Heat Capacity = 385.0
Electric Conductivity = 59.59e6
Electric Conductivity = 59.59e6
End

Material 2
Name = "Air (room temperature)"
Sound speed = 343.0
Relative Permeability = 1.00000037
Density = 1.205
Viscosity = 1.983e-5
Heat Capacity = 1005.0
Relative Permittivity = 1.00059
Relative Permeability = 1.00000037
Relative Permeability = 1.00000037
Relative Permittivity = 1.00059
Heat Conductivity = 0.0257
Heat expansion Coefficient = 3.43e-3
Relative Permeability = 1.00000037
End
kevinarden
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Joined: 25 Jan 2019, 01:28
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Re: Multiple instances of material properties

Post by kevinarden »

Elmer always accepts the last entry. I believe it happens because the properties are repeated ont the different solver tabs. This is due to some like properties being needed by more than one solver. Ideally these properties would be on the general tab, but I doubt it evolved that way, and it would take some work to consolidate it.
modelman75
Posts: 11
Joined: 03 Oct 2020, 23:33
Antispam: Yes

Re: Multiple instances of material properties

Post by modelman75 »

Kevin, Thank you for your quick reply.
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