calculate how flow rate changes as tank fill

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robhare
Posts: 2
Joined: Sun Apr 04, 2010 6:05 pm

calculate how flow rate changes as tank fill

Post by robhare »

Goodday
I'm in the buisness of salvaging ships and am have a problem when calculating my pump requirments . The problem is when a ship is holded on the bottom the cargo hold (tank)starts to flood quickly and slows down as the it fills untill stops when equal with the outside sea level. I can canculate the velocity and flow rate and size of the hole when the cargo hold is empty ( just been holded) but the thing is we are never there at the beginning . I can physicall measure the flow rate between say the 14m and 15 m mark with a stop watch and marks on the cargo hold side . From this how can i calculate what the flow rate would be at the 10m mark and then the 5m mark and so on ? I am ultimatly trying to find what the flow rate will be at 0m mark in the cargo hold , when the pressure difference is at it's max. From this I'll be able to get my pump requirments and calculate the size of the hole.
Thanks
Rob
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Joined: Mon Feb 08, 2010 7:47 pm

Re: calculate how flow rate changes as tank fill

Post by admin »

Here is the post that should have equations to lead you...

viewtopic.php?f=3&t=10
Pipe flow calculations - since 2000
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