Fluids

Fluids

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Modelling low viscous liquid (water) flow on a viscoelastic porous material

    • Saptaswa Biswas
      Subscriber

      I want to model the fluid flow of water at a gas liquid (water-air) interface on a porous viscoelastic material that is heterogenous in structure (3d mesh is available) which is itself attached on another solid porous material like textile (cotton) which is adhered to a solid non-deformable material (plexiglass). The flow happens due to gravity. Is it possible to define the attributes of these substances and model an approximate fluid flow through these substances through polyflow or fluent, and if so, how do I go about it?

    • Rob
      Forum Moderator

      I think you'll need Fluent coupled to Mechanical depending on how complex the membrane motion/behaviour is. However, without knowing what result you need from the model it's near impossible to point you at anything other than the core learning materials (Learning on here) to allow you to build a basic knowledge of what can be done. 

      • Saptaswa Biswas
        Subscriber

        I need to see how much water flows through the viscelastic material (amount and velocity), how much flows on the surface (amount and velocity), which paths the flow takes based on the surface topography, and how the gravitational fluid flow exerts shear stress (surface flow) and normal stress (flow through material) on the material and deforms it with time. I already have the rheological data of the material (G', G").

    • Rob
      Forum Moderator

      OK, you want to model the free surface effects at the fibre level with a fully deforming membrane? How much compute resource and time have you got? 

      • Saptaswa Biswas
        Subscriber

        Would it require a lot of compute power and time as in days? I have options here to do that. I dont need free surface at fibre level, the fabric material can be just modeled as a uniform porous material. The viscoelastic porous material (biofilm) attacjed on top of the fabric has a differential 3d topography, but still it can be considered uniform in terms of its viscoelastic nature at every element.

    • Rob
      Forum Moderator

      Yes, it'll be possible but I suspect the run times would be long, and the cell count very large.  With those changes it would revert to just being a porous media: have a look at the Learning content for Fluent and Mechanical to better understand what you need to do. 

      • Saptaswa Biswas
        Subscriber

        Okay thank you...

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