Boundary condition in SIPHONS - negative pressure

April 3, 2008, 05:51

Hi, I am trying to model a siphon, this is a pipe (non-flexible) with water inside, and the problem I have found is that since the pressure calculations (bernoulli's equation) there is a condition of negative static pressure at the inlet (-8 mca) and a pressure positive at the outlet (0mca), this is due to the siphon effect. I don't understand very well how this could be possible, since water should flow from more pressure to less pressure, does anyone had any experience modelling siphons? Cheers

hamed.majeed · September 19, 2018, 11:19

Yes, that is the working principle of a siphon.

April 3, 2008, 05:51	Boundary condition in SIPHONS - negative pressure	#1
- Guest Posts: n/a	Hi, I am trying to model a siphon, this is a pipe (non-flexible) with water inside, and the problem I have found is that since the pressure calculations (bernoulli's equation) there is a condition of negative static pressure at the inlet (-8 mca) and a pressure positive at the outlet (0mca), this is due to the siphon effect. I don't understand very well how this could be possible, since water should flow from more pressure to less pressure, does anyone had any experience modelling siphons? Cheers

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September 19, 2018, 11:19		#2
hamed.majeed Senior Member Hamed Abdul Majeed Join Date: May 2012 Location: New Orleans, LA, US Posts: 147 Rep Power: 14	Yes, that is the working principle of a siphon.