CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Main CFD Forum

Block interface boundary conditions for multiblock

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 14, 2000, 09:06
Default Block interface boundary conditions for multiblock
  #1
Hyun, Ko
Guest
 
Posts: n/a
Hi! everyone.

I am in developing a 2D FDM flow solver with multi-block grid capability. serially-linked or parallelly-link grids are solved with no difficulties.

But for grids with singularity, like backward-facing step cornder, I have a problem to appose boundary condtition at corner points.

I wrote a code that one boundary condition imposed at one boundary. And used ghost cell to interchage block-to-block information.

So, if backward-facing step problem is considered, I use 3-blocks grid. hence, there is one singularity corner point..... see the fllowing fig.

-----------------------------

1 | 2

| ------ (1)-------------------

| 3

|-----------------------

i meshed the problem like above fig. for block1,3, no-slip bc imposed at point (1). but, I don't know what bc is implemented at point (1) for block 2 computation.

please, give me a change to see the world of CFD..... thanks in advance.
  Reply With Quote

Old   December 14, 2000, 11:08
Default Re: Block interface boundary conditions for multib
  #2
Ghanshyam Singh
Guest
 
Posts: n/a
Dear Hyun,

If I understand your prob. correctly, pl. do the following. First look at the figure:

~~~~~[1]~~~~~[2~~~~~Z~~~~~2]~~~~~[3]~~~~~

Take the blocks in this manner and I hope "ghosts" will not trouble you!! I mean, make the corners or step, represented by "Z", internal part of the block [2]. Which means, corners you will be handling in the same manner as we do in a single block grid. Kindly correct me if I am wrong. It was difficult to draw a good figure. I could not understand yours figure also!!!

GS
  Reply With Quote

Reply

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
CFX does not continue Shafiul CFX 10 February 17, 2011 08:57
Icem Mesh to Foam jphandrigan OpenFOAM Mesh Utilities 4 March 9, 2010 03:58
transient simulation of a rotating rectangle icesniffer CFX 1 August 8, 2009 07:25
Fluent accuracy and boundary conditions Paolo Lampitella FLUENT 0 June 12, 2008 06:25
Please help with flow around car modelling! Tudor Miron CFX 17 March 19, 2004 20:23


All times are GMT -4. The time now is 05:48.