A homogeneous mixture of gasoline and water gives rise to two liquid phases after passing through a valve
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Modeling: The gasoline and water mixture passes through a valve with zero pressure drop； The thermodynamic approach remains unchanged. The operation results show that the valve feed is homogeneous (i.e., there is only one liquid phase) ； However, the flow at the valve outlet consists of two liquid phases. Personally, I believe that after passing through a valve that reduces the pressure to 0, the properties of the fluid flow before and after should be exactly the same; I’m not sure why this simulation result occurs Thank you!
What I don’t understand is how gasoline and water can mix to form a homogeneous mixture Valves that have no pressure loss in terms of design are extremely rare; the only ones that come to mind are full-bore ball valves.
This post was last edited by pying113 on 2017-4-10 08:48. Thank you; maybe I didn’t explain myself clearly. The valve feed is gasoline containing 0.7% (wt) H2O; under the given operating conditions, the Aspen simulation results show only one liquid phase ； After passing through the valve, regardless of whether there is a pressure drop or not, the stream at the valve outlet consists of two liquid phases, with a small amount of water precipitating out. I can’t figure out why this result occurred. Thank you!