When should I enter scaling factor in EDEM-Fluent coupling?

Fatemeh Hosseini_22198

Hello every one,
I am working on CFD-DEM (Particles in the tube) simulations by coupling EDEM and Fluent. I want to do scale up the system to reduce the time of simulation.
I used Archimedes, Froud, Reynolds, Cohesion numbers, and Volume fraction for scale up. (Because I want to scale up both CFD and DEM)
To make these dimensionless numbers constant I changed gravity, viscosity, particle diameter, surface energy, shear modulus, fluid velocity and tube size.
I want to know in this situation  should I enter scale up factor in EDEM-Fluent interface or not?
Honestly, I believe that I should enter Scale up factor when I change only particle radius and now because I change different parameters I shouldn't enter this number. but I am not sure about this !
Could you please guide me?


Regards,
Fatemeh

Stephen Cole

Hi Fatemeh,

As you have essentially scaled all the inputs yourself then I would not use the scale options in Fluent.  If you do then Fluent will apply a scale factor to your scale factor.  The option in Fluent assumes all the inputs are as standard but the particle size has been increased.

Regards

Stephen