Learning Forum

[kiran.purushothamakeshavan]

Hey,

I plan to set up a few simulations to study particle adhesion on the surface of a bluff body by running a 1 way coupled case. 

I would like to know if I can count the number of particles that hit the object, number of particles that stick to the object and then impose criterias such as a critical heat flux value at which particles to stick on a given surface.
More like how we write a UDF for fluent boundary walls.

Thanks,
Kiran

 

 

[Lucas Bertollo Baggio]

Hello Kiran,

You can use two separate particle time selections: one for particles that adhere to the wall and another for those that collide with the wall and bounce off. This will allow you to track every particle that has interacted with both areas at its last timestep within the domain.

If you are familiar with UDFs, you can create a module using the Rocky Solver SDK to handle these calculations. Within this module, you can also incorporate the critical heat flux value.

 

best regards,

Lucas 

[kiran.purushothamakeshavan]

 

Hello Lucas,

I was not able to find examples which use this in any of the tutorials. Is there a way I can find a way to impement it on a simple model.

For both particle counts that stick and bounce. Also any examples I can probably refer to setup an condition to show particle adhesion at a critical heat flux value.

Thanks,
Kiran

 

[kiran.purushothamakeshavan]

 

Hello,

I tried setting particle time selection on Rocky, I would want to run a 1-way coupled simulation using flow file from ansys fluent.

This is what I see on rocky’s side. I don't understand how I can use this to count the number of impinged particles on that wall.

I have a ‘.f2r’ file from Fluent, I just need to use with ROCKY, i did go through the sdk module to see if something might be of help but i dont think i can use any of it.

Please give me your opinion on how I can do this.

Thanks,
Kiran

 

[kiran.purushothamakeshavan]

Hi,

Any help on this would be much appreciated. Thanks