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

Application of SIMPLE method for solving steady state NS equation

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

LinkBack Thread Tools Display Modes
Old   January 25, 2014, 19:23
Question Application of SIMPLE method for solving steady state NS equation
New Member
Join Date: Jan 2014
Posts: 4
Rep Power: 5
MDPrasad is on a distinguished road
Hi every one,
I am trying to model the developing incompressible steady state flow between flat plates (Poiseuille flow) in MATLAB. Staggered grid approach is used. The chosen boundary conditions are as follows:
Extents of the domain: 0<x< L 0< y< h
top and bottom @ y=0& y=h
u=v=0 dp/dy=0
at left boundary @ x=0
v=0, u=const. (uniform across the boundary)
p1=p2-(p3-p2)*0.5 x=0;
at the right boundary@x=L
dp/dx=0, du/dx=0, dv/dx=0
SIMPLE procedure was used for solving the equation and iterations.
The problem is that the pressure correction equation is not giving a unique solution. I have checked the equations and it satisfies the boundary condition and discretisation procedure. I want to know how to correct the pressure correction equation. Pressure correction at the right boundary is zero. I have a taken a linear pressure profile as my initial guess for the problem. So, the pressure correction for the grid points in the top and bottom boundary is same as the pressure correction of the adjacent nodes in the Y direction. Kindly suggest possible corrections and prospective deviations in the method.
MDPrasad 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
unsteady state to steady state neetu kumari OpenFOAM 4 June 14, 2016 18:16
outflow boundary in a steady state 1D convection diffusion eq. hans-186 Main CFD Forum 2 October 14, 2012 17:39
under relaxation factor and the steady state jing113cn FLUENT 0 November 2, 2009 13:13
Steady State 2 phase problem fivos FLUENT 0 April 27, 2009 16:34
About the difference between steady and unsteady problems Lisa Main CFD Forum 11 July 5, 2000 14:37

All times are GMT -4. The time now is 02:35.