[Laksh]

Hi all,

I am modeling a flow of air -water mixture through a filter media. The morphology of water in air is polydispersed. The question I want to post goes as follows:

" I model the pressure drop across the filter through a isotropic momentum loss model wherein I implemented the linear resistance coefficient(dependent on air velocity). Now, I am not sure if CFX takes into account the drop sizes or just the total volume fraction of the dispersed phase to calculate the pressure drop. In other words, if I reduce the size of droplets in the dispersed phase, for the same volume fraction, would CFX predict a higher pressure drop or would the pressure drop remain the same?"

I hope I explained my problem clearly!

Thanks in advance
Laksh

[ghorrocks]

Can't you do a simple test simulation and find out? Send a air/water mixture through your porous media and change the drop size and see if makes a difference.