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heydari February 10, 2003 04:47

Different answers
 
Hi, As I wanted to solve a jet flow, by different value initializing I get different answers, do you know why?

Keil February 12, 2003 02:10

Re: Different answers
 
Hi,

This is my guess, the calculation is not convergence yet. If you judge only the residuals, the residuals are not good to judge whether a calculation is convergence or not. So you should monitor some values at some points and when the values become constant value during iterations,then we can say the calculation is convergence.

Regards,

Keil

heydari February 15, 2003 02:31

Re: Different answers
 
Thanks for your reply KEIL, you mentioned the monitoring, What kind of value (x-vel, y-vel, z-vel, pressure, k, e, ...) do you mean? In an unsteady solution, how can this be used?

Keil February 20, 2003 08:10

Re: Different answers
 
Hi,

I mean, the monitoring is a certain physical value at an arbitrary location in your calculation domain.

How about the following procedure?.

First, you define the location and physical value(for example, velocity magnitude or something). Second ,Define the property(monitoring at every iterations or time steps) on the panel Solve-Monitors-Surfaces. And then calculate it.

I recommend every iterations monitoring because we are able to check whether the calculation is convergence or not in the time.

Regards,

Keil

heydari February 25, 2003 05:04

Re: Different answers
 
thanks for your help,


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