Friction loss due to exit pipe to reservoir

AI Thread Summary
The discussion centers on the head loss formula k(V^2)/2g, specifically when water is discharged from a pipe into a reservoir versus the atmosphere. Participants agree that the coefficient k should remain equal to 1 in both scenarios, as there are no significant flow disruptions or eddy currents at the exit point. The question of whether head loss differs between discharging into a reservoir and the atmosphere is addressed, with consensus that k remains constant at 1. Clarity is provided for non-native speakers regarding the application of k in these contexts. Overall, the conclusion is that k equals 1 for both discharge scenarios.
foo9008
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Homework Statement


we know that the formula of head loss is k(V^2) /2g , the k = 1 when the water is discharged from pipe to reservoir ...However , how if the water from pipe is released into atmosphere ? is it necessary to include the head loss due to exit ? if so , is the k still =1 ? in the example , the author take k=1 when water is released to atmosphere from pipe , is he correct ?

Homework Equations

The Attempt at a Solution

 

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foo9008 said:
No, can you try to answer and reply?
Greg's post is automated. It just bumps your thread back up to somewhere it is more likely to get noticed. He will not have seen your reply.
I see no reason why k should be anything but 1 here. k not equal to 1 represents losses caused by messy flows at the junction. On egress to a wide reservoir or to atmosphere, there is no reason to suppose any eddy currents.
 
haruspex said:
Greg's post is automated. It just bumps your thread back up to somewhere it is more likely to get noticed. He will not have seen your reply.
I see no reason why k should be anything but 1 here. k not equal to 1 represents losses caused by messy flows at the junction. On egress to a wide reservoir or to atmosphere, there is no reason to suppose any eddy currents.
Is the head loss due to water discahrged from pipe to reservoir same as head loss due to water discharged from pipe to atmosphere? The k is 1?
 
foo9008 said:
Is the head loss due to water discahrged from pipe to reservoir same as head loss due to water discharged from pipe to atmosphere? The k is 1?
I thought I just answered that. What in my answer did you not understand?
 
haruspex said:
I thought I just answered that. What in my answer did you not understand?
I am not native emglish speaker... Just to be sure, the k is. 1 when water discharged from pipe to atmosphere??
 
foo9008 said:
I am not native emglish speaker... Just to be sure, the k is. 1 when water discharged from pipe to atmosphere??
Yes.
 
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