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[Robert Caulk <question692798@xxxxxxxxxxxxxxxxxxxxx>]

Question #692798 on Yade changed:
https://answers.launchpad.net/yade/+question/692798

    Status: Open => Answered

Robert Caulk proposed the following answer:
I think I understand the confusion now.

>, by setting it off, the thermal expansion of fluid is nonlinear or
just no thermal expansion?

Neither.

The beta parameter is the volumetric coefficient of expansion for the
fluid [1]. It itself can be temperature dependent for some fluids. For
water, it is linearly dependent on the fluid temperature. ThermalEngine
will automatically set the coefficient of thermal expansion (beta)
according to temperature if you set tempDependentFluidBeta=True. If you
set it to False, then the beta thermal expansion coefficient is
temperature independent (constant).

Cheers,

Robert

https://yade-
dem.org/doc/yade.wrapper.html#yade.wrapper.ThermalEngine.fluidBeta

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