Membrane stretching due to negative pressure in a "microfluidic" device

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jeromiglopez
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Membrane stretching due to negative pressure in a "microfluidic" device

Post by jeromiglopez »

This is a repost from a discussion I started on Contributed Cases.

I am interested in simulating a membrane stretching due to collapsing channels in response to negative pressure. These channels are independent. The channel where the region of interest is located is in contact with a fluid.

It is an enclosed device with three channels, two channels to generate membrane deformation (the membrane is bound to the elastic body) and a middle channel with an inlet and outlet for continuous liquid flow.

The results will be published, hopefully.

I started working on the model in ElmerGUI.
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raback
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Re: Membrane stretching due to negative pressure in a "microfluidic" device

Post by raback »

Hi

If you know the pressure of the fluid domains there is no need to mesh them. Just apply "Normal Force" (same unit as for pressure) on the fluid walls.

-Peter
jeromiglopez
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Re: Membrane stretching due to negative pressure in a "microfluidic" device

Post by jeromiglopez »

Thanks for your suggestion Peter, I usually complicate things.

Can the negative pressure channels cycle on/off using a function?
raback
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Re: Membrane stretching due to negative pressure in a "microfluidic" device

Post by raback »

Sure, for example

Code: Select all

  $a=1.23
  $w=4.56
  Normal Force = Variable time
    Real MATC "a*sin(wt)"
-Peter
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