CFD Online Logo CFD Online URL
Home > Forums > Main CFD Forum

Solid Boundary Condition

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Display Modes
Old   January 11, 2002, 05:05
Default Solid Boundary Condition
Posts: n/a
I am working on a computation in which solid boundary condition should be used. Because several layers of ghost points will be added artificially on the boundary, I wonder how to determine their values according to the known values of the flow field. p.s. My problem is about compressible inviscid flow.

Any comment is welcome!

Yours Sincerely Zhang Lei
  Reply With Quote

Old   January 11, 2002, 07:31
Default Re: Solid Boundary Condition
Posts: n/a
I don't know what method you used. In general, you have discretised equation look like:

A_cell * PH_cell = sum (A_neighbour * PH_neighbour) + source

For solid cells: just set A_cell=1.e+25 (a big number) and source=0.

so that the solver will give PH_cell=0.

You have to treat the boundary between these ghost cell and real fluid cell as proper wall.
  Reply With Quote

Old   January 11, 2002, 08:27
Default Re: Solid Boundary Condition
Posts: n/a
Hi, Seems that you are dealing with compressible Euler system or something similar. If that's the case, solid boundary should be reflective boundary. Hence, you just inverse the velocity perpendicular to the boundary and keep all the other values.
  Reply With Quote

Old   January 11, 2002, 14:03
Default Re: Solid Boundary Condition
Posts: n/a
respectful li,

hello i am prasaath from india. i am a mechanical engineering student. do u have anything to say to me as i know very little about CFD . mail me back.

yours sincerely

  Reply With Quote

Old   January 12, 2002, 18:27
Default Re: Solid Boundary Condition
Posts: n/a
Ask Jamson ...

Hu ...
  Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
mixed inflow/outflow downstream boundary condition question peob OpenFOAM Running, Solving & CFD 2 August 14, 2014 09:07
how to set up a wall boundary condition according to calculated wall shear stress? gameoverli OpenFOAM Pre-Processing 1 May 21, 2009 08:28
increasing mesh quality is leading to poor convergence tippo CFX 2 May 5, 2009 10:55
How To Convert Fluid wall in Solid Wall Boundary Condition RGN FLUENT 4 March 31, 2009 04:43
Convective Heat Transfer - Heat Exchanger Mark CFX 6 November 15, 2004 16:55

All times are GMT -4. The time now is 07:27.