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jag December 4, 2006 05:31

critical Reynolds number
 
what is the criticl Reynolds number when water flows through pipe? what is the critical Reynolds number when air flows through pipe? thanks

ag December 4, 2006 10:32

Re: critical Reynolds number
 
The critical Re for pipe flow is usually taken as ~ 2300, assuming you are referring to transition to turbulence. This Re is based on pipe diameter and does not depend on the type of fluid.

jag December 4, 2006 12:35

Re: critical Reynolds number
 
thanks for ur reply but Reynolds number = ud/kienmatic viscosity.. so Re depends on kinematic viscosity also..... this is my doubt..


ag December 4, 2006 13:58

Re: critical Reynolds number
 
Yes, it does - so use the correct kinematic viscosity for the appropriate fluid. The critical Re is still ~2300.

jag December 4, 2006 23:26

Re: critical Reynolds number
 
thank u......


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