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-   -   Euler equation (http://www.cfd-online.com/Forums/cfx/22697-euler-equation.html)

petr June 12, 2006 09:20

Euler equation
 
Hello,

i would like to know whether it is possible to solve fluid flow problem with the help of Euler equation model (non-viscous fluid)in CFX.

Thank You, Petr.


CFD Man June 12, 2006 09:39

Re: Euler equation
 
Set the flow to laminar and the viscosity to a very small number.

petr June 12, 2006 09:55

Re: Euler equation
 
Thank You.

One more question. Is it easy to prescribe viscosity ? Sorry for this question, but at recent time i am not able to check it (once more again sorry).

Petr.


Joe June 12, 2006 10:23

Re: Euler equation
 
Yes. Create a new material in the material editor and set the transport properties as needed.

For a pseudo-Euler analysis dont set the viscosity to exactly 0, just a suitably small value.

petr June 12, 2006 10:25

Re: Euler equation
 
Thank You Joe and CFD Man.

junc October 16, 2012 11:57

hello!
i am conducting a simulation through euler equation in cfx and meet some questions.
i set a very low Dynamic Viscosity value, the 'laminar' turbulence model option .besides, i also set the 'Free Slip Wall' option at all walls. however, i get the following message in cfx solver:
+--------------------------------------------------------------------+
| ERROR #002100004 has occurred in subroutine Out_Scales_Flu. |
| Message: |
| The Reynolds number is outside of the range expected based on the |
| Option selected for the TURBULENCE MODEL. Check this setting, |
| the values of the properties, mesh scale, consistency of units |
| and solution values in the input file. Execution will proceed. |
+--------------------------------------------------------------------+
does this message effects the result?
thank you for your reply!

ghorrocks October 16, 2012 18:26

It is just a warning. You can ignore it - but make sure you know that the flow is in fact laminar.

junc October 17, 2012 00:19

thank you, ghorrocks!


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