How to calculate sphericity for finding the inertial and viscous resistance ? -- CFD Online Discussion Forums

March 9, 2018, 03:45

How to calculate sphericity for finding the inertial and viscous resistance ?

nareshzeeda1994

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Naresh Mahendran

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Hi.

I need help to find out the inertial resistance and viscous resistance.

I'm using the below formulaes to calculate it.

RV = [ 150 (1-e)^2 ] / [ (sphericity)^2 * (Hydraulic dia)^2 * (porosity)^3 ]
RI = [ 3.5 (1-e) ] / [ (sphericity) * (Hydraulic dia) * (porosity)^3 ]

I have attached the dimensions in the image. Dimensions are 2.83*.08*49 mm

How to find hydraulic dia and sphericity ??

Thanks in advance.

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Tags

formulaes, hydrauic diameter, resistance, sphericity

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