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-   -   transient analysis _porous medium (https://www.cfd-online.com/Forums/cfx/96495-transient-analysis-_porous-medium.html)

shaswat January 24, 2012 13:03
transient analysis _porous medium
 
Dear folks

I am doing transient flow analysis under porous medium . I set the porosity 0.5
I did domain interface .I set BC. I also did initialization. Still I have Global warning
as stated below



"In Analysis 'Flow Analysis 1' - Domain 'WATER': Transient analyses require that initial conditions are specified unless an Initial Values file is specified at run-time".

Kindly give your advice to proceed the problem

Thank you

Shashwat

Trues January 24, 2012 14:08
Quote:
Originally Posted by shaswat (Post 340922)
Dear folks

I am doing transient flow analysis under porous medium . I set the porosity 0.5
I did domain interface .I set BC. I also did initialization. Still I have Global warning
as stated below



"In Analysis 'Flow Analysis 1' - Domain 'WATER': Transient analyses require that initial conditions are specified unless an Initial Values file is specified at run-time".

Kindly give your advice to proceed the problem

Thank you

Shashwat
Shashwat,

I'm fairly new to the world of CFD, but have you tried running a Steady State analysis and using those as an Initial Values to your transient analysis?

-Trues

ghorrocks January 24, 2012 16:40
The error message is pretty obvious. You need to define an initial condition. You can either define an initial condition from a steady state run as suggested, or you can define it by domain or globally in the simulation setup. Either way, you have to define an initial condition somehow.

shaswat January 24, 2012 21:11
transient
 
Quote:
Originally Posted by ghorrocks (Post 340950)
The error message is pretty obvious. You need to define an initial condition. You can either define an initial condition from a steady state run as suggested, or you can define it by domain or globally in the simulation setup. Either way, you have to define an initial condition somehow.
Dear friend

My input is 1D interpolation function,ie pressure(t). can I do steady state analysis?

Regards

Shashwat

ghorrocks January 25, 2012 00:18
No. Steady state means all the boundaries are steady state as well.


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