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

Question of Anil Date's SIMPLE method

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   November 18, 2009, 21:12
Unhappy Question of Anil Date's SIMPLE method
  #1
New Member
 
yu
Join Date: Nov 2009
Posts: 26
Rep Power: 17
universez is on a distinguished road
Hi, all.
I am trying to use the modified SIMPLE method by Anil W. Date with curvilinear grids. First, I do not know if the method is good or not. Please let me know your suggestion if it is not a good one.


I have several questions.

1, what is the boundary condition for p'. In the book, "Introduction to Computational Fluid Dynamics". It was suggested that dp'/dn=0, with some part of boundary p'=0.

2, for the boundaries what coeffecients should be ? e.g. for cell p, the west side is a wall or a symetrical boundary, how to define Aw?

3 for a block, extraplated pressure values should be values at cell surface or at cell center.

I did two different tests,
a, ractangular domain, left side input with velocity boundary, right side is outlet boundary, top is wall and bottom is a symmetrical boundary. For pressure i have p'=0 at the right side. during iteration, when the flow reach to the right side, pressure at the right boundary deverges.

b, a domain with 2 block region, there is ZigZag problem, which starts from a corner of one of the block, then spread to the whole domain.

I am not sure if it is because of wrong values the pressure at boundaris, or corners points.

I appreciate any help.


Yu
universez is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Very simple question Vashishth Patel CFX 10 November 8, 2011 05:26
Simple method for fluid flow in 3D abdou Main CFD Forum 9 November 9, 2004 06:53
need help in fotran code for simple method saritha Main CFD Forum 3 April 30, 2004 13:55
Output Boundary settingon Simple Method Yoshi Main CFD Forum 1 March 22, 2004 11:56
A Simple Question Thomas P. Abraham Main CFD Forum 3 September 6, 1999 19:19


All times are GMT -4. The time now is 11:10.