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the material parameters depending on temperature

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Old   December 22, 2006, 02:51
Default the material parameters depending on temperature
  #1
Jason
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Hi,all Now I have fifty groups number,the aluminium density depending on temperature.How can I add this to my material in cfx?

Maybe I can add this using CEL, Temp=Densitylower+(Densityupper-Densitylower)*(T-Templower)/(Tempupper-Templower)

But it is difficult as there are two many data . Maybe I can use the profile instead. I have no idea. Could someone give me some suggestions? Thank you in advance.

Jason
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Old   December 22, 2006, 10:03
Default Re: the material parameters depending on temperatu
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opaque
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Dear Jason,

Read about 1D interpolation function in the ANSYS CFX-Pre manual. Then, you will input (Temperature,Density) pairs, and let the solver evaluate that for you..

Opaque
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Old   December 22, 2006, 10:37
Default Re: the material parameters depending on temperatu
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Jason
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Dear Opaque :

Thank you for your help. It is very useful for me.

The Units in the Plot seems different from the "Result Units" .For example,I set the thermal conductivity [W m^-1 K^-1] in "result Units", and it turns out [kg m s^-3 K^-1] in the plot in the expression. Is it Okay?

Jason
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Old   December 22, 2006, 10:57
Default Re: the material parameters depending on temperatu
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opaque
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Dear Jason,

[W] = [J s^-1] = [N m s^-1] = [kg m s^-2 m s^-1] = [kg m^2 s^-3]

[W m^-1 K^-1] = [kg m^2 s^-3 m^-1 K^-1]= = [kg m s^-3 K^-1]

I do not see any problem..

Opaque
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Old   December 22, 2006, 20:54
Default Re: the material parameters depending on temperatu
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Jason
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Dear Opaque :

I got it. Thank you. yours

Jason
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