Fluid flow problem- pressure vs momentum

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SUMMARY

The discussion centers on a fluid flow problem involving a tank connected to a pump suction line and a parallel line open to the atmosphere. When the pump is activated, it will draw fluid from both the tank and the parallel line until the parallel line is empty. The flow rate at the junction of the two pipes will match the pump's flow rate. To maintain equal fluid levels in both tanks, a direct connection between the two tanks is recommended, along with the use of an additional pump for filling.

PREREQUISITES
  • Understanding of fluid dynamics principles
  • Knowledge of pump operation and suction lines
  • Familiarity with parallel flow systems
  • Basic plumbing and piping design concepts
NEXT STEPS
  • Research fluid dynamics and pressure differentials in piping systems
  • Learn about pump selection and sizing for specific applications
  • Study the principles of maintaining fluid levels in interconnected tanks
  • Explore the design and implementation of parallel flow systems in fluid mechanics
USEFUL FOR

Engineers, fluid mechanics students, and professionals involved in tank design and fluid transfer systems will benefit from this discussion.

vishal badal
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I am having a tank at the bottom of which a pump suction line is connected..

there is another parralel line to that bottom line which is open to atmosphere.

Please note that this second pipe is connected to the bottom pipe; not to the tank...

there is only flow inlet to the tank.

what will happen when the pump will start??

will all the fluid in that parallel line which was initially present will be sucked??

or the tank will compensate that fluid by passing some fluid to maintain the same level as in the tank?

Please suggest...

If interested mail me on [email deleted by moderator]

I will let u know the detail drawing for explanation...
 
Last edited by a moderator:
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vishal badal said:
I am having a tank at the bottom of which a pump suction line is connected..

there is another parralel line to that bottom line which is open to atmosphere.

Please note that this second pipe is connected to the bottom pipe; not to the tank...

there is only flow inlet to the tank.

what will happen when the pump will start??

will all the fluid in that parallel line which was initially present will be sucked??

or the tank will compensate that fluid by passing some fluid to maintain the same level as in the tank?

Please suggest...

If interested mail me on [email deleted by moderator]

I will let u know the detail drawing for explanation...

How about providing us with a sketch of your setup.

CS
 
Last edited by a moderator:
vishal badal said:
I am having a tank at the bottom of which a pump suction line is connected..

there is another parralel line to that bottom line which is open to atmosphere.

Please note that this second pipe is connected to the bottom pipe; not to the tank...

there is only flow inlet to the tank.

what will happen when the pump will start??

will all the fluid in that parallel line which was initially present will be sucked??

or the tank will compensate that fluid by passing some fluid to maintain the same level as in the tank?

Please suggest...

If interested mail me on vish02vishal@yahoo.com

I will let u know the detail drawing for explanation...

Please find the attachment in the form of a drawing for ready reference..
 

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stewartcs said:
How about providing us with a sketch of your setup.

CS

Please find the attachment of a drawing for ready reference...named tank problem...

thanks for the reply...

please do the needful..
 
Last edited:
vishal badal said:
Please find the attachment of a drawing for ready reference...named tank problem...

thanks for the reply...

please do the needful..

The pump will suck from both tanks until the one not being filled is empty. At the point were the pipes are joined the flowrate will be the same as the pump flowrate. Going further into the the other two lines requires you to consider a parallel flow.

What are you trying to determine exactly.

CS
 
stewartcs said:
The pump will suck from both tanks until the one not being filled is empty. At the point were the pipes are joined the flowrate will be the same as the pump flowrate. Going further into the the other two lines requires you to consider a parallel flow.

What are you trying to determine exactly.

CS

thanx...

my concern is to keep the level of 2nd tank same as that of that of 1st...

it could have been possible easily if had connected the pipe from 2nd tank to 1st tank directly...rather line its discharge line...

now because i am connecting it to the bottom pipe of 1st; will it make a difference and as per your cocncern; will the 2nd tank become empty?

please find the drawing again...for reference...
 
vishal badal said:
now because i am connecting it to the bottom pipe of 1st; will it make a difference and as per your cocncern; will the 2nd tank become empty?

Yes it will empty eventually.

CS
 
well you can keep level the same by taking a pipe between both of them this will keep yput tanks at same level of water , and you can use another pump for filling process only on one tank
 

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