Fluid model in SU2

shahidhk21 · January 24, 2022, 07:46

In case of fluid model multple options are present. By default it takes FLUID_MODEL= STANDARD_AIR with GAMMA and GAS_CONSTANT parameter values provided.
If I want to use IDEAL_GAS instead of STANDARD_AIR, what all parameters do I need to define (like gamma etc) and what is the main difference between the two?

PENGGEGE777 · January 25, 2022, 04:42

Assuming you use same fluid, e.g., Nitrogen (N2), then its gamma and gas constant should be same, regardless you choose standard air or ideal air.

For ideal gas, we compute density based on P=RT/v calculation.

For standard air, we obtain density based on experiment data.

Hope this helps.

January 24, 2022, 07:46	Fluid model in SU2	#1
shahidhk21 New Member Shahid Khan Join Date: Jan 2022 Posts: 8 Rep Power: 4	In case of fluid model multple options are present. By default it takes FLUID_MODEL= STANDARD_AIR with GAMMA and GAS_CONSTANT parameter values provided. If I want to use IDEAL_GAS instead of STANDARD_AIR, what all parameters do I need to define (like gamma etc) and what is the main difference between the two?

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January 25, 2022, 04:42		#2
PENGGEGE777 Member PENG YAN Join Date: Jul 2021 Location: Italy Posts: 34 Rep Power: 4	Assuming you use same fluid, e.g., Nitrogen (N2), then its gamma and gas constant should be same, regardless you choose standard air or ideal air. For ideal gas, we compute density based on P=RT/v calculation. For standard air, we obtain density based on experiment data. Hope this helps.