Which outlet BC is better for this pump?

March 1, 2005, 12:23

I'm trying to simulate the flow in a well and pump system as shown below

outlet

^

|

| surface | | |

| | | |

-----| | | | inlet | | | --> | | |

-----| | | |

| |_________| |

| |

|________________________|

The flow enters from the inlet to the well and exits from the outlet, where a pump is pumping the flow out. The well is exposed to the air. Now I kown the inlet velocity and the approximate surface elevation in the well, but I don't know the outlet pressure caused by the pump. So what kind of BC is better for the outlet? Simply outflow? or pressure outlet(but the pressure is not available)?

March 1, 2005, 12:29

sorry, the figure doesn't work as I thought. Basically, the flow enters from the inlet at the left side to a container(well). A pump is pumping water out from the pipe at the right side. The pipe is connected to the well at the right-bottom corner. The well is open to the atmosphere.

March 1, 2005, 12:23	Which outlet BC is better for this pump?	#1
Mike Guest Posts: n/a	I'm trying to simulate the flow in a well and pump system as shown below outlet ^ \| \| surface \| \| \| \| \| \| \| -----\| \| \| \| inlet \| \| \| --> \| \| \| -----\| \| \| \| \| \|_________\| \| \| \| \|________________________\| The flow enters from the inlet to the well and exits from the outlet, where a pump is pumping the flow out. The well is exposed to the air. Now I kown the inlet velocity and the approximate surface elevation in the well, but I don't know the outlet pressure caused by the pump. So what kind of BC is better for the outlet? Simply outflow? or pressure outlet(but the pressure is not available)?

March 1, 2005, 12:29	Re: Which outlet BC is better for this pump?	#2
Mike Guest Posts: n/a	sorry, the figure doesn't work as I thought. Basically, the flow enters from the inlet at the left side to a container(well). A pump is pumping water out from the pipe at the right side. The pipe is connected to the well at the right-bottom corner. The well is open to the atmosphere.

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