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Old   July 19, 2007, 10:33
Default specific heat in solid
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marescu
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Hi, I need to calculate case when cp of solid increases with temperature, so I change specific heat of solid during the calculation (transient)using SPECH.f , and the result is a drop of temperature in solid, when cp is increased. Do you have any experience with that? what's wrong? Thanks Marescu
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Old   July 19, 2007, 11:25
Default Re: specific heat in solid
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Pauli
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For a constant heat flux, higher Cp will results in lower dT = Q=m*Cp*dT. So depending upon your problem, that may be correct. What do you expect to happen?
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Old   July 19, 2007, 12:08
Default Re: specific heat in solid
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marescu
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this is not what i mean. There is a is a drop of Temperature in the time step the cp is changed . i.e. for constant positive heat flux, following Q=m*cp*dT the temperature is still growing( with different dT),- no temperature drop. So I've got sudden temperature drop in one particular time step....
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Old   September 5, 2007, 14:16
Default Re: specific heat in solid
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cthsieh
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in specht.f

C-------------------------------------------------------------------------

C C This subroutine enables the user to specify the mean specific heat

C capacity at cells and boundaries.

C

C CP - Mean specific heat capacity (J/kgK)

C (of the background fluid in multi-component fluids)

so I think, you must set "Mean specific heat capacity " at each temperature of solid
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Old   September 23, 2007, 20:30
Default Re: specific heat in solid *NM*
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jefferson
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