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[Bruno Chareyre <question247705@xxxxxxxxxxxxxxxxxxxxx>]

Question #247705 on Yade changed:
https://answers.launchpad.net/yade/+question/247705

    Status: Open => Answered

Bruno Chareyre proposed the following answer:
>(1) The default viscosity of fluid is 1, not 0.001Pa.s for water, why?

Some fluids are not water.

>(2) There is no setting for fluid density, What the default value of
it?

Tthe current model is assuming Stokes flow, which is non-inertial flow.
Yet, you are right that buoyancy depends on fluid density .... 

>(3) There is no buoyant force, when a sedimentation simulation

... so, you should define the material like this:
material.density = (solidDensity-fluidDensity) #submeged density, independent of fluid flow.

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