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Search: Posts Made By: pakk
Forum: Fluent UDF and Scheme Programming June 22, 2015, 03:56
Replies: 25
Views: 3,673
Posted By pakk
No problem. I didn't feel you were rude, only...

No problem. I didn't feel you were rude, only inaccurate. Good luck! :)
Forum: Fluent UDF and Scheme Programming June 19, 2015, 07:32
Replies: 25
Views: 3,673
Posted By pakk
If you think steady state LES has no purpose,...

If you think steady state LES has no purpose, then don't do it. You are free to spend a lot of computation time to get transient effects into your LES, and later on remove all those transient effects...
Forum: Fluent UDF and Scheme Programming June 19, 2015, 06:04
Replies: 25
Views: 3,673
Posted By pakk
If you find out that you did not simulate what...

If you find out that you did not simulate what you needed to simulate, then yes, you need to do it again.
But the good news is that steady-state is much faster than transient. I don't know why you...
Forum: Fluent UDF and Scheme Programming June 19, 2015, 05:37
Replies: 25
Views: 3,673
Posted By pakk
So, if I summarize, you want to do a steady-state...

So, if I summarize, you want to do a steady-state LES simulation, but you did a transient LES simulation? If that is the case, then the solution is obvious: do a steady-state LES simulation.


You...
Forum: Fluent UDF and Scheme Programming June 19, 2015, 05:20
Replies: 25
Views: 3,673
Posted By pakk
It is instantaneous LES-averaged. Otherwise you...

It is instantaneous LES-averaged. Otherwise you are talking about DNS simulations. I get again the feeling that you are confusing LES-averaging with time-averaging...


I believe I already said...
Forum: Fluent UDF and Scheme Programming June 19, 2015, 05:09
Replies: 25
Views: 3,673
Posted By pakk
OK, good that you know it now. In that case,...

OK, good that you know it now.

In that case, probably, you don't need to do anything special. As far as I know, if you use LES in fluent, your 'normal' flow properties are actually the...
Forum: Fluent UDF and Scheme Programming June 19, 2015, 04:49
Replies: 25
Views: 3,673
Posted By pakk
Do you know what the difference is between...

Do you know what the difference is between time-averaged, volume-averaged and LES-averaged?
Forum: Fluent UDF and Scheme Programming June 19, 2015, 04:25
Replies: 25
Views: 3,673
Posted By pakk
Unless you know which kind of average you want, I...

Unless you know which kind of average you want, I can not help you. (Or actually, I don't want to explain how to get every possible type of average, while you only need one. I have only limited time...
Forum: Fluent UDF and Scheme Programming June 19, 2015, 04:09
Replies: 25
Views: 3,673
Posted By pakk
What does "mean value" mean? Time-averaged?...

What does "mean value" mean? Time-averaged? Volume-averaged? The LES-filtered?

I don't see how you can integrate over time without a velocity field on different time steps. What are you doing?
...
Forum: Fluent UDF and Scheme Programming June 19, 2015, 03:35
Replies: 25
Views: 3,673
Posted By pakk
First of all: you want to put the data in a User...

First of all: you want to put the data in a User Defined Memory (UDM), not a User Defined Scalar.

So:
1. Change the code (replace UDSI by UDMI).
2. Add a user defined memory. (In the menu...
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