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-   -   at what Reynolds number for non-Newtonian fluids flow that the laminar region end ?? (https://www.cfd-online.com/Forums/main/102026-what-reynolds-number-non-newtonian-fluids-flow-laminar-region-end.html)

the best future May 20, 2012 18:23
at what Reynolds number for non-Newtonian fluids flow that the laminar region end ??
 
Hi all
My investigation is about non-Newtonian fluids flow through the sudden expansion duct in both laminar and turbulent region
My problem .... i do not know at any Reynolds number that the laminer region finish and at what value the turbulent will begin???? .. my work will complete if you help me .. i need to know at what Reynolds number that the laminar region end???
thank you

the best future May 21, 2012 16:40
I need your help please ......

abhaykrsahu May 22, 2012 00:26
for flat plate it should be more than 5 x 10^5 and for pipe flow it should be more than 2300

the best future May 22, 2012 06:48
thank u so much abhaykrsahu for your help. but is this information true for non_Newtonian fluids ? or it is for newtonian fluid?

abhaykrsahu May 22, 2012 06:56
its for newtonian fluid....in case of non newtonian fluid which are highly viscous...they can be considered as laminar flow..... i do not have any idea about specific values


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