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-   -   starcd 3.24 has bugs? (http://www.cfd-online.com/Forums/cd-adapco/56619-starcd-3-24-has-bugs.html)

whitemelon May 13, 2008 07:56

starcd 3.24 has bugs?
 
I did a transient simulation of the exhaust system of engine by starcd 3.24, the negative density appeared when the first step was over.The time step is 2.7778e-5,the engine speed is 6000rpm,the mesh is all hexa by ICEMCFD.There's no effect on convergence by adjusting the relaxation factor and pressure correcter factor,I have no idea of changing the situation. But a strange sign occured when i used the star cd 3.15 for the simulation, the negative density disappeared, i don't know why?

Will May 14, 2008 08:03

Re: starcd 3.24 has bugs?
 
Try upgrading to the the latest verion (3.26 or 4.06) 3.24 is a few years old now

whitemelon May 16, 2008 00:42

Re: starcd 3.24 has bugs?
 
The problem also exist when i use starcd 3.26.

Joern Beilke May 16, 2008 01:47

Re: starcd 3.24 has bugs?
 
"switch 60 on"


whitemelon May 16, 2008 08:16

Re: starcd 3.24 has bugs?
 
"switch 60 on" ,wha't the mean?

Joern Beilke May 16, 2008 09:33

Re: starcd 3.24 has bugs?
 
Just enter the command into prostar an see if it works.


whitemelon May 16, 2008 10:44

Re: starcd 3.24 has bugs?
 
switch on 60,it doesn't work.


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