Reynold number

Submitted by shokeyi on Thu, 04/25/2013 - 15:37

Hi,
I tried to model a sphere in a fluid. It should be obey the Stoke's flow and the reynold number should be very small. Does anyone know where to set the reynold number? In addition, the transport model for my simulation is Newtonian. Is it related to the change of reynold number? Thanks.

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alice's picture

alice | Fri, 04/26/2013 - 09:32

Hey,
well considering how the reynolds number is composed (L*v/nu) there are several ways. guessing that you do not want to change the size of the sphere itself, i would recommend to adjust either inlet velocity or the viscosity of the fluid.
cheers,
alice

shokeyi | Fri, 04/26/2013 - 11:33

Hi,
Then the length of L refers to the boundary of the inlet fluid not the size of particle. Is it? Thanks.

alice's picture

alice | Mon, 04/29/2013 - 08:20

Well depends on the Reynolds number you want to generate. If you have a look at the particle Reynolds number it refers to the particle diameter, if you consider the flow through a tube L referrs to the tube diameter...