CFX Post time selector

mahi55 · August 15, 2018, 03:30

Hello!

I'm quite new to CFD and trying to simulate a case of rotating body using ANSYS CFX 18.0
I set time 20s and time step 0.05s.
I'm not sure If I can get data at different times within my simulation?
As for example I need to get vertical velocity contours at 5s 10s 15s.
I tried couple of things with the help of this forum but nothing worked out

I tried to do it using timestep selector but it shows only the last time which is 20s.

Is it possible to get the results at different times without having to simulate it again at different time using cfx?
Immidiate response will help a lot

Thanks

Gert-Jan · August 15, 2018, 03:38

If you don't tell CFX what to do, it will only write a results file at the end of your calculation (=1 .res-file). That is what you obtained.
There is no fall back scenario. You have to rerun the case.

So, go to Pre and tell CFX what to save at intermediate timesteps. Therefore go to OutputControl > Transient results. There you can tell when and what to save.
You can choose for a complete file at every time step. I always use "Selected variables" like Velocity, Pressure, Temperature, TKE, etc. With this, you get small .trn-files with only the data you are interested in. Saves a lot of disk space......

Good luck, Gert-Jan

mahi55 · August 16, 2018, 02:20

Thank you so much Sir. I've rerun the simulation again.

August 15, 2018, 03:30	CFX Post time selector	#1
mahi55 New Member Maheen Rana Join Date: Jul 2018 Posts: 3 Rep Power: 8	Hello! I'm quite new to CFD and trying to simulate a case of rotating body using ANSYS CFX 18.0 I set time 20s and time step 0.05s. I'm not sure If I can get data at different times within my simulation? As for example I need to get vertical velocity contours at 5s 10s 15s. I tried couple of things with the help of this forum but nothing worked out I tried to do it using timestep selector but it shows only the last time which is 20s. Is it possible to get the results at different times without having to simulate it again at different time using cfx? Immidiate response will help a lot Thanks

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August 15, 2018, 03:38		#2
Gert-Jan Senior Member Gert-Jan Join Date: Oct 2012 Location: Europe Posts: 1,895 Rep Power: 28	If you don't tell CFX what to do, it will only write a results file at the end of your calculation (=1 .res-file). That is what you obtained. There is no fall back scenario. You have to rerun the case. So, go to Pre and tell CFX what to save at intermediate timesteps. Therefore go to OutputControl > Transient results. There you can tell when and what to save. You can choose for a complete file at every time step. I always use "Selected variables" like Velocity, Pressure, Temperature, TKE, etc. With this, you get small .trn-files with only the data you are interested in. Saves a lot of disk space...... Good luck, Gert-Jan

August 16, 2018, 02:20		#3
mahi55 New Member Maheen Rana Join Date: Jul 2018 Posts: 3 Rep Power: 8	Thank you so much Sir. I've rerun the simulation again.