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Search took 0.00 seconds. Search: Posts Made By: ali92
Forum: CFX July 29, 2013, 09:27
Replies: 42
Views: 5,353
Posted By ali92
Post multizone in meshing

thanks.
I have another question. When I want to use multizone for meshing, the following error appears.(indicated in picture)
I want to use hexa mesh in my simulation.
In your opinion what should...
Forum: CFX July 28, 2013, 15:16
Replies: 42
Views: 5,353
Posted By ali92
Post "Indirect start method returned non-zero exit code"Error

Hi friends.
I use six computers for solving my problem.
I cannot understand why following error is appeared?
"Indirect start method returned non-zero exit code"
Forum: CFX July 16, 2013, 09:25
Replies: 42
Views: 5,353
Posted By ali92
Thanks for your good advice. Yes,I followed the...

Thanks for your good advice.
Yes,I followed the parallel installation instructions in the documentation.

I try two problems in the tutorial, but I can not run in parallel. These problems had...
Forum: CFX July 15, 2013, 04:31
Replies: 42
Views: 5,353
Posted By ali92
Post thanks a lot. I have a problem in CFX Solver. I...

thanks a lot.
I have a problem in CFX Solver. I want to use Hp MPI Local Parallel in Run Mode. But after little time solver was stopped.
If MPI CH2 Local Parallel is applied, I face with Error 255....
Forum: CFX July 8, 2013, 10:19
Replies: 42
Views: 5,353
Posted By ali92
What is important to me is velocity and pressure...

What is important to me is velocity and pressure downstream of the gate for estimate cavitation index. I can simulate shorter length of upstream of the gate. It only have conducted to ensure of my...
Forum: CFX July 8, 2013, 00:51
Replies: 42
Views: 5,353
Posted By ali92
Post Yes it is. Knife edge is my gate. I emphasize...

Yes it is. Knife edge is my gate. I emphasize tunnel before gate is pressurized.(is not free surface flow) and after gate is free surface flow.
My air inlet is large arrow in the picture. Boundary...
Forum: CFX July 7, 2013, 09:31
Replies: 42
Views: 5,353
Posted By ali92
Post It is indicated in the following picture.

It is indicated in the following picture.
Forum: CFX July 7, 2013, 08:13
Replies: 42
Views: 5,353
Posted By ali92
Post Hello Glenn thanks for your advice too. I...

Hello Glenn
thanks for your advice too.
I have read FAQ precisely. It is said:
If these parameters are not changing to an accuracy tolerance suitable for your simulation then your simulation is...
Forum: CFX July 7, 2013, 07:51
Replies: 42
Views: 5,353
Posted By ali92
Post Hello mjgraf thanks for your advice. I just...

Hello mjgraf
thanks for your advice.
I just have free surface flow down stream of gate.(Not in the whole tunnel) In upstream of gate, flow is pressurized. Resolution for interface is mesh...
Forum: CFX July 6, 2013, 08:00
Replies: 42
Views: 5,353
Posted By ali92
Before I simulate steady state, I did transient....

Before I simulate steady state, I did transient. But this way last 10 days!
In addition, results are not logical. In this case air velocity in inlet2 is very high!
(120m/s)
Forum: CFX July 6, 2013, 07:42
Replies: 42
Views: 5,353
Posted By ali92
Post Is it correct that I simulate a steady simulation...

Is it correct that I simulate a steady simulation instead of transient?
How were pictures?
Forum: CFX July 6, 2013, 07:19
Replies: 42
Views: 5,353
Posted By ali92
Post Excuse me. For Comparison with physical model I...

Excuse me.
For Comparison with physical model I need to simulate steady.
I do not have result of physical model in different time.
Forum: CFX July 6, 2013, 06:53
Replies: 42
Views: 5,353
Posted By ali92
Smile thanks. Yes. I know my simulation is transient....

thanks.
Yes. I know my simulation is transient. At first I do so. But for compression with physical model I need to simulate steady.
Forum: CFX July 6, 2013, 06:42
Replies: 42
Views: 5,353
Posted By ali92
Lightbulb thanks. Yes. I know my simulation is transient....

thanks.
Yes. I know my simulation is transient. At first I do so. But for compression with physical model I need to simulate steady.
Forum: CFX July 6, 2013, 03:10
Replies: 42
Views: 5,353
Posted By ali92
These pictures are added:

These pictures are added:
Forum: CFX July 6, 2013, 03:01
Replies: 42
Views: 5,353
Posted By ali92
Question I used auto timescale with different timescale...

I used auto timescale with different timescale Factor.If it is greater than 12, the program gives error 255. With this timescale factor:
RMS U,V,W>1e-4
RMS air,water<1e-4
Velocity: is converged...
Forum: CFX July 4, 2013, 09:18
Replies: 42
Views: 5,353
Posted By ali92
I am really appreciate your help!:)

I am really appreciate your help!:)
Forum: CFX July 4, 2013, 05:55
Replies: 42
Views: 5,353
Posted By ali92
Question physical time scale

How do you choose correct physical time scale?
FAQ said:
Use a larger physical time step. A time step approximately equal to the average residence time in the simulation domain is a good guide for...
Forum: CFX July 3, 2013, 12:38
Replies: 42
Views: 5,353
Posted By ali92
Smile I have read the above file. In a steady state,...

I have read the above file.
In a steady state, to achieve a reasonable answer, how many iterations are needed?
The answer does not converge to a residual set. What is the solution for this...
Forum: CFX June 29, 2013, 16:24
Replies: 42
Views: 5,353
Posted By ali92
Thanks a lot for your kind help.

Thanks a lot for your kind help.
Forum: CFX June 28, 2013, 06:50
Replies: 42
Views: 5,353
Posted By ali92
Question A more accurate model is shown in Fig. As can be...

A more accurate model is shown in Fig. As can be seen, there is a step in the model so that the air must be modeled in this situation.My goal is to compute the index Cavitation all over the tunnel....
Forum: CFX June 27, 2013, 08:42
Replies: 42
Views: 5,353
Posted By ali92
Problem in Result in bottom outlet

Hello I have a question about boundary condition in a dam bottom outlet. Boundary conditions are given as follows:
Inlet1 (Water): pressure=1204000 pa
Inlet2 (Air): pressure=0 pa
Outlet:...
Showing results 1 to 22 of 22

 
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