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

Error with higher order (2nd, GAMMA) upwind scheme

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

LinkBack Thread Tools Search this Thread Display Modes
Old   September 24, 2012, 03:02
Default Error with higher order (2nd, GAMMA) upwind scheme
Senior Member
Join Date: Mar 2009
Posts: 402
Rep Power: 19
quarkz is on a distinguished road

I changed my solver from central to 1st order upwind scheme and it works fine when my cylinder is stationary.

When I tried using higher order schemes, such as 2nd order upwind or GAMMA, I get divergence and erroneous results.

I 've some questions when using higher order upwind scheme:

1. do i have to use higher resolution to ensure stability/accuracy?

2. are these schemes stable/accurate at low Re e.g. 100?

3. do i have to use smaller time step?

i tried to change the resolution and Re but there's still problems.

Hope someone can help. Tks.
quarkz 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
First Order to Higher Order Blending Factor NormalVector FLUENT 4 November 13, 2023 07:06
applying 2nd order muscl scheme to 2D unstructured(triangle) grid dokeun Main CFD Forum 2 May 22, 2012 02:42
Differences between serial and parallel runs carsten OpenFOAM Bugs 11 September 12, 2008 11:16
Higher order downwind scheme jelmer OpenFOAM Running, Solving & CFD 4 August 9, 2006 06:43
second order FD upwind scheme Heinz Wilkening Main CFD Forum 2 November 3, 1998 14:33

All times are GMT -4. The time now is 14:11.