|October 18, 2013, 06:38||
Stream is sticking to the wall
Join Date: Oct 2013
Posts: 7Rep Power: 3
I have a problem with swirl coal burners calculations. Burner design provides 3 air steams. Main air stream is swirled.
I am using steady state.
I have tried various methods to converge these burners:
- different mesh (coarse, fine, with cells directed along and across the stream, with and without boundary layer)
- with and without: energy, combustion
- calculations start with all 3 streams, calculations start with 1 stream and after obtain convergent swirl stream I added second one and third one.
- different wall functions for k-epsilon
- another turbulence models like: RSM
- first order/ second order discretization methods, and pseudo transient options.
Unfortunately, results are almost always the same.
At the beginning streams are formed (Fig. 1)
Later stream starts to oscillate (Fig. 2)
At the end stream is sticking to the wall (Fig. 3)
I am also attaching animated .gif file (simulation inside combustion chamber) - http://imgflip.com/i/499sp
If you have and ideas how to fix this problem, or what should I check, please help.
|Thread||Thread Starter||Forum||Replies||Last Post|
|Enhanced Wall Treatment||paduchev||FLUENT||18||April 11, 2014 07:37|
|Conjugate Heat Transfer: Wall Heat Flux at Coupled Walls?||MaxHeat||FLUENT||3||April 21, 2013 18:22|
|Free stream temperature in tube wall||saharesobh||FLUENT||2||November 19, 2012 08:32|
|Free Stream & Wall Temp UDF||jww||FLUENT||0||October 2, 2009 09:37|
|Quick Question - Wall Function||D.Tandra||Main CFD Forum||2||March 16, 2004 05:29|