Asked by Todd
water 20 degrees celsius flows through a 25 mm diameter pipe at a rate of 50 liters per minute.
is this laminar or turbulant flow or both?
is this laminar or turbulant flow or both?
Answers
Answered by
drwls
Calculate the dimensionless Reynolds number,
Re = (rho)*D*V/(viscosity)
The flow is
* laminar when Re < 2300
* transitional when 2300 < Re < 4000
* turbulent when Re > 4000
The viscosity of water at 20 C is
mu = 1.002*10^-3 N*s/m^2 or kg/m*s
The pipe cross sectional area is A = 4.904*10^-4 m^2
The velocity at the flow rate mentioned is
V = (50*10^-3 m^3/s)/4.904*10^-2 m^2
= 102 m/s
The water density is 1000 kg/m^w3
Reynolds number is
(10^3)*2.5*10^-2*102/1.002*10^-3
2.5*10^6
Not even close. It is turbulent flow
Re = (rho)*D*V/(viscosity)
The flow is
* laminar when Re < 2300
* transitional when 2300 < Re < 4000
* turbulent when Re > 4000
The viscosity of water at 20 C is
mu = 1.002*10^-3 N*s/m^2 or kg/m*s
The pipe cross sectional area is A = 4.904*10^-4 m^2
The velocity at the flow rate mentioned is
V = (50*10^-3 m^3/s)/4.904*10^-2 m^2
= 102 m/s
The water density is 1000 kg/m^w3
Reynolds number is
(10^3)*2.5*10^-2*102/1.002*10^-3
2.5*10^6
Not even close. It is turbulent flow
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.