modelling of Venturimeter

avb
avb Altair Community Member
edited July 2023 in Community Q&A

what should be the hydraullic dia considered for finding the boundary layer parameters for flow through venturimeter Should it be pipe dia or throat dia ?

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Answers

  • acupro
    acupro
    Altair Employee
    edited July 2023

    If you use the throat, that will give you the 'worst case' for first layer height.  That will be the area of highest velocity, so smaller first layer height for same Y+.  The pipe diameter will be larger so that same first layer height will yield a smaller Y+.

    You may be better off using different first layer heights for the different regions - or setting the first layer height as a function of surface mesh size.  That way where surface mesh is smaller, the first layer height will also be smaller.

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