# Pressure calculations

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 August 20, 2011, 20:16 Pressure calculations #1 New Member   shrevats Join Date: Aug 2010 Posts: 2 Rep Power: 0 What is the difference between absolute total pressure and absolute pressure in star ccm+?

August 23, 2011, 16:01
#2
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Ryne Whitehill
Join Date: Aug 2009
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Quote:
 Originally Posted by shrevatsan 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

 August 23, 2011, 21:15 #3 New Member   shrevats Join Date: Aug 2010 Posts: 2 Rep Power: 0 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.

August 24, 2011, 08:42
#4
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Ryne Whitehill
Join Date: Aug 2009
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Rep Power: 12
Quote:
 Originally Posted by shrevatsan 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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