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Oil Flow Rate
Last Post 27 Mar 2013 05:03 PM by Noushka. 4 Replies.
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Noushka
New Member
Posts:3
16 Mar 2013 01:42 AM
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.
Niel
Basic Member
Posts:193
17 Mar 2013 03:23 AM
Have you applied Stokes Flow equations across the interface?
http://en.wikipedia.org/wiki/Stokes_Flow
Niel Leon
engineering.com
Noushka
New Member
Posts:3
17 Mar 2013 05:48 PM
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.
Niel
Basic Member
Posts:193
19 Mar 2013 02:37 AM
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
Noushka
New Member
Posts:3
27 Mar 2013 05:03 PM
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?
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