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Search took 0.00 seconds. Search: Posts Made By: zhongzhiyuan
Forum: FLUENT December 4, 2012, 01:18
Replies: 20
Views: 5,338
Posted By zhongzhiyuan
Hi Xebid, in my short paper, I have already...

Hi Xebid,

in my short paper, I have already given how I trigger the instability. if it is still not clear to you, you can find the reference paper to read in my paper. basically the idea is to...
Forum: FLUENT December 4, 2012, 01:12
Replies: 20
Views: 5,338
Posted By zhongzhiyuan
Hi Kaixin, I do not have experience in using...

Hi Kaixin,

I do not have experience in using udf for this. However, we can set the coupled wall for heat exchange between fluid and gas in fluent. Radian can also be set in fluent boundary...
Forum: FLUENT December 1, 2012, 22:27
Replies: 20
Views: 5,338
Posted By zhongzhiyuan
hi xebid: here is an example for you: ...

hi xebid:

here is an example for you:
/**********************************************************************/
/* unsteady.c */
/* UDF...
Forum: FLUENT April 8, 2012, 03:04
Replies: 20
Views: 5,338
Posted By zhongzhiyuan
Hi Raj: I think you dont add a continuous...

Hi Raj:

I think you dont add a continuous sinusoidal pressure wave at outlet. Otherwise, you will have a continuous perturbation. You should use the UDF to add a gauge pressure like...
Forum: FLUENT April 5, 2012, 23:09
Replies: 20
Views: 5,338
Posted By zhongzhiyuan
Hi Raj: For the articial perturbation, I...

Hi Raj:

For the articial perturbation, I think you should first compute the steady state and use it as the initial condition for unsteady, this will make the onset of osicillation faster. If you...
Forum: FLUENT April 4, 2012, 22:38
Replies: 20
Views: 5,338
Posted By zhongzhiyuan
besides, PISO velocity-pressure coupling should...

besides, PISO velocity-pressure coupling should be used
Forum: FLUENT April 4, 2012, 22:34
Replies: 20
Views: 5,338
Posted By zhongzhiyuan
Hi rajk: I am still working on that. Since...

Hi rajk:

I am still working on that. Since I have a different gemotry, I do not know if I can find the limit-cycle or not. If you simulate the same geometry (straight rijke tube), I think you...
Forum: FLUENT February 26, 2012, 02:49
Replies: 20
Views: 5,338
Posted By zhongzhiyuan
how to trigger combustion instability in fluent

Hi all,

Now I am doing combustion in a rijke tube and I follow the work of
C.-C. HANTSCHK AND D. VORTMEYER (NUMERICAL SIMULATION OF SELF-EXCITED THERMOACOUSTIC INSTABILITIES IN A RIJKE TUBE,...
Showing results 1 to 8 of 8

 
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