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Old   February 10, 2014, 07:11
Default Total pressure deficit in inviscid solution
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Hello All,

In an axisymmetric inviscid solution (no swirl), I observe that total pressure, being imposed as 101325 Pa at the inlet, varies (reduces) within the domain, especially near the walls.
The figure showing non-constant total pressure is attached.

I use pressure based coupled solver with third order muscl for all variables except pressure, which is second order.

When I select PRESTO, the effect reduces but still continues.

What can be the reason of this in an inviscid solution?

Regards,
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Last edited by sercan85; February 11, 2014 at 01:43. Reason: Title is improved
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Old   February 11, 2014, 08:33
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no reply for this? it is a problem of total pressure deficit in an inviscid flow.
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Old   February 11, 2014, 13:04
Default Friction loss
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Quote:
Originally Posted by sercan85 View Post
Hello All,

In an axisymmetric inviscid solution (no swirl), I observe that total pressure, being imposed as 101325 Pa at the inlet, varies (reduces) within the domain, especially near the walls.
The figure showing non-constant total pressure is attached.

I use pressure based coupled solver with third order muscl for all variables except pressure, which is second order.

When I select PRESTO, the effect reduces but still continues.

What can be the reason of this in an inviscid solution?

Regards,
This is the loss due to viscous effects.
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Old   July 11, 2014, 10:19
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Hello

I still suffer dfrom this problem. There is no viscosity in inviscid solver so this should be a numerical error in entropy.

Solver: pressure based coupled solver

Is there a solution for this?

Regards,

Sercan
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