# Pressue in CFD post is Relative or Absolute pressure?

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 June 5, 2015, 01:11 Pressue in CFD post is Relative or Absolute pressure? #1 Senior Member   sluzzer Join Date: Jul 2014 Posts: 129 Rep Power: 5 The pressure and total pressure values in cfd-post are relative pressure or absolute pressure? I have gone through many post still it is confusing. Please clarify

 June 5, 2015, 04:41 #2 Senior Member   Thomas MADELEINE Join Date: Oct 2014 Posts: 126 Rep Power: 5 Static Pressure is relative pressure Absolute Pressure is well... absolute pressure and Total Pressure is Total Pressure (static + dynamic). It is absolute like the Pressure. For more details see the help in ANSYS CFX theory guide 1.1.3 then Pressure or Total Pressure Last edited by Thomas MADELEINE; June 5, 2015 at 04:46. Reason: wrong emplacment of help paragraph

 June 5, 2015, 07:24 #3 Senior Member   sluzzer Join Date: Jul 2014 Posts: 129 Rep Power: 5 thanks Thomas for your reply... so, if i used some reference pressure other than 0, then my total pressure is total pressure (from cfd post) + reference pressure used.. am i right?

 June 5, 2015, 08:19 #4 Senior Member   Thomas MADELEINE Join Date: Oct 2014 Posts: 126 Rep Power: 5 No. quote from ANSYS Help: The terms Pressure and Total Pressure are absolute quantities and must be used to derive the Total Pressure when using an equation of state (compressible) formulation (particularly for Equation 1–48).

 Tags cfd post, pressure, relative pressure

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