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

Boundary conditions

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

LinkBack Thread Tools Display Modes
Old   August 18, 2009, 05:25
Default Boundary conditions
New Member
Join Date: Aug 2009
Posts: 2
Rep Power: 0
minnymoony is on a distinguished road
I'm taking a CFD class at university and have to write a code (in matlab) to solve the flow in a 2-D nozzle.The nozzle is symmetric so i'm solving only halve.

What i'm not sure of now is how exactly to write the boundary conditions
on the symmetry plane. is it enough to say that the pressure (and u,v,rho)
on the symmetry plane are the same as on one 'line' above? rho(i_max,=rho(i_max-1,?

Does any one know of a code that I can look at and compare (i'm using Beam & Warming method)?

minnymoony is offline   Reply With Quote

Old   August 18, 2009, 14:22
Join Date: Mar 2009
Posts: 74
Rep Power: 10
otd is on a distinguished road
It would seem that the symmetry condition requires no mass flow across the symmetry boundary (velocity normal to boundary = 0). In some algorithms that may imply the pressure gradient = 0, very similar to making the pressure the same on either side of the symmetry plane.
otd is offline   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
Impinging Jet Boundary Conditions Anindya Main CFD Forum 25 February 27, 2016 13:58
symmetry boundary conditions in cfx lost.identity CFX 41 May 22, 2013 07:21
Problems with boundary conditions for a lowRekOmegaSST turbulence model cfdmarkus OpenFOAM Running, Solving & CFD 16 November 14, 2011 05:44
Pressure boundary conditions Lionel S. Main CFD Forum 1 August 24, 2007 18:03
Trimmed cell and embedded refinement mesh conversion issues michele OpenFOAM Other Meshers: ICEM, Star, Ansys, Pointwise, GridPro, Ansa, ... 2 July 15, 2005 04:15

All times are GMT -4. The time now is 18:34.