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Forum: Main CFD Forum

October 11, 2012, 09:52

Replies: 4

Absolute or Gauge pressure? NS and Equation of state

Views: 1,629

Posted By cici

Thanks. Some references ignore the acoustic...

Thanks.
Some references ignore the acoustic pressure Pa, and decompose the pressure into the thermodynamic pressure Pt and hydrodynamic pressure Ph. Pt is used for equation of state, not the total...

Forum: Main CFD Forum

October 10, 2012, 13:23

Replies: 4

Absolute or Gauge pressure? NS and Equation of state

Views: 1,629

Posted By cici

Thanks! But I knew this. I should use governing...

Thanks! But I knew this. I should use governing or conservation equations instead of NS equations. In the conservation of engergy, there are u(dp/dx) and p(du/dx), if we use total enthalpy as the...

Forum: Main CFD Forum

October 10, 2012, 10:59

Replies: 4

Absolute or Gauge pressure? NS and Equation of state

Views: 1,629

Posted By cici

Absolute or Gauge pressure? NS and Equation of state

Hi All,

Are those pressure used in NS equations the same as in equation of state? My understanding has always been that the former gauge pressure, the latter absolute one. But how come most of...

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