|
[Sponsors] |
September 20, 2017, 11:02 |
Problem on LES of incompressible free jet
|
#1 |
New Member
Bo Kong
Join Date: Oct 2016
Location: China
Posts: 22
Rep Power: 9 |
I am doing a LES of incompressible free jet with the Re=70000. The computation domain extents 15D in streamwise and 10D in radial direction. Max co is adjusted to less 0.6.
When the flow developed to the outlet, backflow appeared, k exploded then case crashed. boundary conditions at the outlet I set as below: U:zeroGradient; p:fixedValue; k:inletOutlet; nuSgs:zeroGradient I have simulated a similar jet with lower Re(30000), and not encountered this problem. So I am confused with this and have no idea on this issue. Could anyone give me some advise how to solve this problem? Thanks! |
|
Tags |
backflow, jet, les |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Help!simulation of free water jet | Annie | FLUENT | 3 | June 29, 2009 00:51 |
problem with highly underexpanded free jet | Raaf | Phoenics | 11 | April 8, 2009 13:36 |
Free jet B.C. | shuo | Main CFD Forum | 0 | August 10, 2008 03:46 |
Free Jet | krish | FLUENT | 0 | January 4, 2008 06:07 |
free jet | al | FLUENT | 2 | December 10, 2007 10:55 |