Hi,

Would anyone have an idea how I could estimate the flow rate of Heavy Fuel Oil at the bottom of a pierced tank?

Viscosity: 380 cst at 32 degrees Celsius

I know that
Q=VA and V=(2.g.h)^0.5

But that doesnt account for viscosity...

Thanks.

Have you applied Stokes Flow equations across the interface?

http://en.wikipedia.org/wiki/Stokes_Flow

Niel Leon
engineering.com

Thanks for the reply Niel.

I dont know much about creeping flow theory, but I guess the precise way to solve this problem, would be to do a complete CFD analysis.

I was just wondering if there was a simple hand calculation check I could use to get an idea of the flow rate out of the hole.

I already know the depth and size of the hole in the tank, but I have no idea how to account for the fact that the oil here is very thick / viscous.

If you know the dynamic viscosity of the fluid you can apply it to the Stokes equiation and that should provide you with the answer.

Niel

Yeah I now the dynamic viscosity, but it doesnt seem to be quite straightforward to simply use the stroke equations for a practical example like this.

I can calculate the pressure gradient, but how could I know the second derivative of speed , and the applied body force f?