Flow out time vessel, viscosity fluid 1

[Eino]

Hi,

I am a mechanical engineer at the moment I am trying to determine the flow out time of fluid in a tank.
The fluid has a viscosity of 200cP, how do I determine the flow out time of an atmospheric tank.
The tank has a capacity 18m³

How much influence has the viscosity of an fluid on the flow out time of a tank.

Which formula can I use.

 

[jmw]

Hi Eino,
Are you a student?
If so you should post in the student section of

http://www.Cheresources.com

If not, try the pipelines, Piping and Fluid mechanics engineering forum.
The best thing is to buy a copy of the Crane fluid flow 410 manual.

Yes, viscosity has a significant effect, by the way.

JMW

http://www.ViscoAnalyser.com

 

[DYV1973]

If it flows through a pipe, you should calculate Reynolds, and most likely you can use for laminar flow the poisseuile equation:

dp = 32 eta v l / d^2

p = pressure drop (fluid column/2)
eta = viscosity
v = fluid velocity
l = length of pipe
d = diameter of pipe

Velocity will decrease as the tank gets more empty.

DYV

 

[Twoballcane]

This should be in any fluids book.

Tobalcane
"If you avoid failure, you also avoid success."

 

[rb1957]

i'm sure it is ! ... as i remember it, the hardest thing to quantify is Cd, though i suspect that there are standard values that can be used.

 

[ione]

Hope the atatched paper helps (it should)