Learning Forum

[BenB]

Hello!

 

I should mention from the off that I am a reasonably new hand at simulation and modelling for these sorts of problems. I am trying to simulate liquid flow through porous media; I'm aware that there are many guides and how-to's on this matter in general available on the internet.

 

However, I am trying specifically to model the flow front progression of an impregnation process in a porous body as a function of time, in the regime of incomplete material saturation. I.e., I want my output to be, I suppose, a 3D surface profile where the coordinates are evolving as a function of time. I would want the simulation to terminate before the fluid reached the outlet (i.e. porous body surface).

 

What I hope to gain from asking this is clarity on what functions of Ansys I should be looking to use for this, if there are any? My knowledge on the matter is rather limited, unfortunately!

 

[Raef.Kobeissi]

I am not quite clear about the 3d surface profile, but anyway, ANSYS has a porous model that you can use for such a problem. Some good examples on youtube and on ANSYS resource page.

[BenB]

I am not quite clear about the 3d surface profile, but anyway, ANSYS has a porous model that you can use for such a problem. Some good examples on youtube and on ANSYS resource page.

So modelling mold filling, is an equivalent way of thinking of it.

So; at t=0, the 'region' has no liquid it in, at t=t1, there'll be an amount in the mold and there will be an amount of space unfilled by liquid. Ideally, I'd want an output to show where the flow front would have progressed to, and where would still be empty as a function of time.

I only ask as the simulations I've seen have all been in a saturated regime. Would this require coupling multiphase flow, for instance, with the porous flow models?

 

[DrAmine]

You can export the free surface of your filling process into ASCII format if you want to that of you visualize that in Fluent or CFD-Post or Ensight or wherever you want. Just to highlight the porous model in Fluent is based on Darcy Fochheimer  apporach where the obstacles/fibers/solids are not resolved but theier effect on pressure (presure drop) and velocity might be taken into account.