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Old   July 4, 2014, 11:40
Default Reference values and operating conditions
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I see that Ansys Fluent has reference values and also operating conditions. Could someone please explain the purpose of these reference values.

Is it required to change these reference values I mean for instance do I need to input density, viscosity of a fluid at a mean temperature in the domain in the reference value settings (or) is it fine to leave the reference values to some defaults
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Old   July 7, 2014, 03:34
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The reference values do not influence the numerical solution in fluent.
They are only used for computing coefficients like lift or drag coefficient.

The operating conditions on the other hand can have an influence on the numerical solution, depending on the setup.
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Old   November 23, 2014, 05:58
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Quote:
Originally Posted by flotus1 View Post
The reference values do not influence the numerical solution in fluent.
They are only used for computing coefficients like lift or drag coefficient.

The operating conditions on the other hand can have an influence on the numerical solution, depending on the setup.
dear flotus1,

ı try to model melting/solidification for phase change material in enclosure. so thermophysical properties are depend on temperature. ı mean ı have values both solid and liquid phase (for cp, k). also ı have udf for density that depend on temperature.
my question what should be operating temperature for this case. my initial temperature for phase change material is 300K. operating temperature shold be 300 or not. ı am confisued. thanks for your help.
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Old   November 25, 2014, 10:51
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Quote:
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my question what should be operating temperature for this case. my initial temperature for phase change material is 300K. operating temperature shold be 300 or not. ı am confisued. thanks for your help.
There is only an operating pressure. Where do you see the operating temperature setting?
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Old   November 26, 2014, 12:03
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There is only an operating pressure. Where do you see the operating temperature setting?
hi LuckyTran. you can see operating temperature/density in cellzone conditions-operating conditions-on rightside (below) of the panel when you activate boussinesq approximation.

Last edited by thermal energy; November 26, 2014 at 17:47.
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Old   November 26, 2014, 12:33
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Operating temperature is shown only when boussinesq approximation is on.
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