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effective? turbulent? laminar?

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Old   November 29, 2002, 18:24
Default effective? turbulent? laminar?
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MissNancy
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Guys, I have got two stupid questions for you 1) In the famous drag-particle reynoulds number: Cd=Rep/24(1+0.15*Rep^2/3); for which Rep=dp*Ur*rho/mu; now my question is, to determine the particle Reynoulds number, what type of fluid viscosity do I have to use (effective? turbulent? laminar? viscosity?) 2) In the Saffman Lift Force, there is a viscosity (or kinematice viscosity),what type of viscosity do I have to use here (effective? turbulent? laminar? viscosity?)

Nancy
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Old   November 29, 2002, 23:17
Default Re: effective? turbulent? laminar?
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mukhopadhyay
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(1)laminar. laminar viscosity is fluid property while 'turbulent' viscosity is a consequence of the flow, depends on the flow characteristics and coordinates.
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Old   November 30, 2002, 02:08
Default Re: effective? turbulent? laminar?
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MissNancy
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Yes I know that, but which one do I have to use in the above two equations?
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