|
[Sponsors] |
How to set the inflow conditions of turbulent BL? |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
March 7, 2006, 02:57 |
How to set the inflow conditions of turbulent BL?
|
#1 |
Guest
Posts: n/a
|
hi,
i want to simmulation the compressible flat plate boundary layer. i do not known how to set the inflow BC. for example, given Re and Ma numbers, how to known the displacement thickness? i read some papers, which not give a certain value of displacement. if i set a blasius solver at inflow, the pressure and density are setted p_inf and r_inf? by the way, what is the difference between the spatial boundary layer and the temporal boundary layer? best regards |
|
March 8, 2006, 04:41 |
Re: How to set the inflow conditions of turbulent
|
#2 |
Guest
Posts: n/a
|
Hi CFDer
Have u gone through the text book CFD by Anderson Jr. There is chapter on solving the above problem of Flat Plate he give the procedure for coding and different numericals also are presented the evaluation of flow conditions at inlet and outlet, far field check that chapter (may be 12) Bye All the Best Ravi Kiran |
|
March 8, 2006, 10:05 |
Re: How to set the inflow conditions of turbulent
|
#3 |
Guest
Posts: n/a
|
Dear CFDer..
Yeah you will find the proper inflow conditions from Anderson book chapter 10 for compressible Supersonic flow over flat plate case. In compressible flow case, the inflow conditions are set based on characteristic wavespeeds directions. For Supersonic case all the wavespeeds are positive so Simply you apply the Freestream conditions. but for subsonic case one of the wavespeed is in -ve direction ( u, u, u+a, u-a) ... u-a So you have to extrapolate one boundary condition from the interior of the physical domain... Plz refer..Computational Fluid Dynamics principles and applications by BLEZAK .J It is the best book for Compressible flow. I hope it will help Regards Mohamed |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Turbulent Boundary Conditions | cfd seeker | FLUENT | 2 | June 24, 2011 03:28 |
[Help] Boundary conditions for turbulent flow (kEpsilon) | schaumy | OpenFOAM | 1 | May 24, 2011 10:48 |
How to set up rough wall conditions | weigsi | STAR-CCM+ | 1 | February 28, 2011 10:09 |
How to set multiple boundary conditions? | Daggemann | FLUENT | 1 | April 17, 2009 16:43 |
prescribed inflow conditions | Thorsten | Main CFD Forum | 2 | January 29, 1999 16:03 |