Critical Values Of Reynolds Number. When a fluid flows over a flat plate a turbulent flow is to be expected if the Reynolds numbers are greater than 100000. 2100 flow is laminar.
Because R is less than 2000 this flow is laminar. At a moderate Reynolds number Re 10 the viscous layer region becomes smaller. At a flow rate of 50000 bblday the Reynolds number is using Eqn 516 R 922450000 250.
At a moderate Reynolds number Re 10 the viscous layer region becomes smaller.
A unique numerical value of the stability parameter K permits one to calculate the critical value of an arbitrarily defined Reynolds number regardless of such complicating factors as noncircular geometries nonisothermal flows or non-Newtonian fluid behavior as stated by Hanks. The critical Reynolds number is the Reynolds number at which a laminar flow is expected to change into a turbulent flow. For typical drilling fluids the critical Reynolds number is in a range of 2100 to 4000. 4000 flow is turbulent.
