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

Problem with transient solution of flow past a row of cylinders

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

LinkBack Thread Tools Search this Thread Display Modes
Old   January 6, 2010, 12:16
Default Problem with transient solution of flow past a row of cylinders
New Member
Join Date: Jan 2010
Posts: 1
Rep Power: 0
jostanek is on a distinguished road
I am trying to run a 3D unsteady RANS simultation of flow past a row of cylinders in cross flow. To model the row of cylinders, I am using a periodic boundary condition placed at half the cylinder spacing on both sides of the cylinder.

I'm using FLUENT, a structured mesh, and SST k-w viscous model. My spatial discretizations are all first order (to obtain an initial solution) and my discretization in time is second order implicit.

When I run the simulation to enough time steps for the mean flow to cross the domain several times, I am not seeing any vortex shedding downstream of the cylinder. I checked the cell courant number and all are below 1, so I think I have the right time step. And, since there is no vortex shedding, the lift coefficient on the cylinder is zero rather than oscillating at the correct Strouhal frequency.

Any help is greatly appreciated.

jostanek is offline   Reply With Quote


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
initialize flow field with steady state solution holg FLUENT 0 July 13, 2009 17:10
Flow past cylinder with an exact solution? Anna Main CFD Forum 1 February 26, 2006 07:14
Could anybody help me see this error and give help liugx212 OpenFOAM Running, Solving & CFD 3 January 4, 2006 18:07
Poiseuille flow problem Rosie FLUENT 1 December 6, 2002 16:52
beginning - Flow past a square cylinders Odenir de Almeida Main CFD Forum 4 February 10, 1999 09:38

All times are GMT -4. The time now is 23:11.