Non compressable fluid

Is there any way to model hydraulic fluid? Either as a force dependant on volume (perhaps allowing microscopic volume changes to determine the pressure), or as a material? Or even as a force dependant on another force?
I see a compression only support which I don't think helps, and a fluid tab in materials which I can't seem to activate. The pressure force can only be dependant on time it seems.
Conceptually this would be a fluid filled pressure vessel which is exposed to external stress. Any single point distortion to the shell would increase/decrease the internal pressure and affect the shell stress at all points. I don't need to model any sort of fluid flow.

Thank you,


  • You want fluid volume to be constant, so you can define a material with poisson ratio 0,499999 and very low young module.
    See attached model. Fluid module is constant.
    Incompressible fluid.liml
  • Very smart approach German! I work with another codes (Zebulon) where we can use a special card to keep a void volume constant. I will try to find a way to use this trick, maybe a filled bottle.
  • Very nice, I think that will work for me.

    Thank you,
Sign In or Register to comment.

Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!