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Force on Submerged Tubing

Force on Submerged Tubing

Force on Submerged Tubing

(OP)
I need to calculate the downward vertical force exerted on a section of tubing that is submerged and discharging a cold water flow into hot water.

The tubing is 27.125 inches long and is connected to a water supply on one end w/ a flow rate of 3 GPM. The other end is open to a tank of hot water. I am assuming the tube is completely submerged in water. The tube has ID 0.58" and OD 0.65". The tube material is smooth plastic. The flow cycles on and off, so I am assuming the greatest force will be when it first turns on, similar to the jolt felt when a firehose or garden hose first turns on.

I have calculated several different forces several ways (including shear stress along the tube inner wall and momentum flux at the outlet)  and everything I get is of minimal value, always <0.1 lbf.

Any sort of help is appreciated.  

RE: Force on Submerged Tubing

Double posting.  See responses in Mechanical engineering other topics.

Ted

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