Negative absolute pressure

Gianluca90 · October 3, 2016, 05:43

Hi guys

I would like to ask you a question about the physical meaning of negative absolute pressure. I am collaborating in developing a CFD simulator for oil reservoirs and I have to integrate it with a Phase Equilibria algorithm in the presence of capillary pressure. I have noticed that in the capillary, when the vapor phase pressure is quite low, the liquid pressure can become negative. What's the physical meaning of it? Could it be physically reasonable?

flotus1 · October 3, 2016, 06:33

No, a negative absolute pressure is not physically reasonable, just like a negative temperature.
If this occurs in a simulation it is usually a sign that something went wrong.

October 3, 2016, 05:43	Negative absolute pressure	#1
Gianluca90 New Member Gianluca Lubelli Join Date: Oct 2016 Location: Copenhagen Posts: 1 Rep Power: 0	Hi guys I would like to ask you a question about the physical meaning of negative absolute pressure. I am collaborating in developing a CFD simulator for oil reservoirs and I have to integrate it with a Phase Equilibria algorithm in the presence of capillary pressure. I have noticed that in the capillary, when the vapor phase pressure is quite low, the liquid pressure can become negative. What's the physical meaning of it? Could it be physically reasonable?

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October 3, 2016, 06:33		#2
flotus1 Super Moderator Alex Join Date: Jun 2012 Location: Germany Posts: 3,399 Rep Power: 46	No, a negative absolute pressure is not physically reasonable, just like a negative temperature. If this occurs in a simulation it is usually a sign that something went wrong.