Particle Transport Velocity Through Pipe
Particle Transport Velocity Through Pipe
(OP)
Hi,
I am looking for a formula and/or source that could give me transport velocities (aka settling velocities) for particles traveling through pipes. My goal is to wash coal debris into a drainage system and transport it through a 6" pipe and not allow the fine particles of the coal to settle and form sediment piles in the pipe which could later build up and eventually clog the pipe.
Any help is greatly appreciated. Thank You.





RE: Particle Transport Velocity Through Pipe
RE: Particle Transport Velocity Through Pipe
I have used GPSA, 11th Edition, Volume 1, Section 7 with success.
Applicable are Equations 7-1 thru 7-6 and Figures 7-3 & 7-4.
The above works well provided you are not too concerned about a moving bed flow pattern and you just want to get an idea of which particles will carry and which particles will settle out. Apart from that, the book:
"Flow Of Complex Mixtures In Pipe" - Govier, Aziz et al will give some more complete treatment.
Regards,
SNORGY.
RE: Particle Transport Velocity Through Pipe
Since I do not know all your details, just a thought:
Seems that you by 6" drainage is thinking unpressurized, self-fall and regulating the setteling problem by amount of water?
This could be OK if transport is short and total cost including waterprice (amount including cleaning afterwards).
If not, there exists pressuriced systems either operating by (batchwise) pumps (using cleaner part of water as pushing all debris in front),or vessels acting as batchwise cannons, using clean water or water driven by pressuriced air as a batchwise transport media.
More solid and lowerdimension pipe could perhaps be selected, and you do not need self-fall pipelines.
Pipes and valves adapted to pigging and given (sharp, abrasive) media. Remember in case solid clambering of pipe.