Collecting many time-velocity data in FLUENT
 

Hello there,

I have a simulation whereby Im trying to extract approximately 5000 velocity points at different location of the flow domain at different time steps.

I initially tried to define rakes and use surface monitors to display and write the velocities at each time step to a file. But this method only seems to average out the velocity over the points of the rake and display a single velocity at each time step.

Then I tried defining approximately 5000 individual points but the HPC ran out of memory!

Does anyone know how to solve this problem I have. I might be using define monitors wrongly but Ive experiemented with different settings and it hasnt worked.

Hope someone can help me out here

Cheers
Darren

Hi Darren,
the other choice is using a UDF that execute every time step and write your desired data to a specified file with pre-defined precision.

Hello xrs,

I have tried your method and it seems to be working in my PC. I define a plane and save the points in the plane in ascii format. However when I scripted the TUI to run the same case in my HPC, the drop down menu of transient-export dosent have the ascii format. My PC and HPC are running exactly the same version 12.1 however the HPC is running a UNIX copy.

Do you know what might be the problem?

Cheers
Darren

I just realised that you cant export files in ASCII format if you are using a parallel version of FLUENT!!!. Surely such an easy task can be achieved without using a UDF?