Recent content by yash_it_is

yes that's what I'm trying to understand why in the X-direction due to the pressure the force is (P1 - patm)A1 when patm acts all over the pipe how can we say that in the X-direction due to pressure the net force by atmospheric pressure be -PatmA1 when Patm clearly acts everywhere and net Area...

Yes I did but the problem I am facing is if we consider a CV which includes only the fluid in the tube , we get a pressure of 220 kpa acting on left cross section a pressure of 1atm on the cross section where the fluid leaves and then an Fx for horizontal force by pipe and Fy for vertical force...

this was the question i was working on and instead of the gauge pressure they used I used Pabsolute and the solution was different cause I don't understand how Patm force was able to cancel out Pabsolute in the x direction in cross section 1 thereby leading P1-Patm force.

I did but the problem I am facing is when we have arbitrary variation in cross section one cannot solve for force due to pressure so easily but the case of gauge pressure as effective pressure over anybody with any cross section is generalized. I'd really like a mathematical proof.

the link ain't working.

I want to ask why is it that we use gauge pressure instead of absolute pressure in CV analysis for momentum conservation of fluids. I did read that because P(atm) would be present everywhere so it won't have a net effect on the CV but it's highly non intuitive as I can't apply force balance on...