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shrevatsan August 20, 2011 20:16

Pressure calculations
 
What is the difference between absolute total pressure and absolute pressure in star ccm+?

rwryne August 23, 2011 16:01

Quote:

Originally Posted by shrevatsan (Post 320842)
What is the difference between absolute total pressure and absolute pressure in star ccm+?


Absolute pressure is the static pressure (not a gauge pressure, which is what the absolute refers to)

Absolute total pressure is the stagnation pressure, also not a gauge pressure

shrevatsan August 23, 2011 21:15

Hello rwryne,

Thanks for the reply!I found one more field variable which is just "pressure" in star ccm+.Does this denote the gauge pressure?Does it include any other components?I am posing this question because the three pressure variables:"absolute total pressure","absolute pressure" and "pressure"indicated different values in my case.

rwryne August 24, 2011 08:42

Quote:

Originally Posted by shrevatsan (Post 321270)
Hello rwryne,

Thanks for the reply!I found one more field variable which is just "pressure" in star ccm+.Does this denote the gauge pressure?Does it include any other components?I am posing this question because the three pressure variables:"absolute total pressure","absolute pressure" and "pressure"indicated different values in my case.


They should all indicate different pressures, except on walls! There are actually 4 scalar fields related to pressure, you are leaving off Total Pressure. But yes, "pressure" and "total pressure" denote gauge pressures.


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