Pressure drop issue between two devices
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Impact of pressure drop between two connected devices: 1. The medium in the connecting pipeline is a vapor-liquid mixture; 2. The medium in the connecting pipeline is in liquid phase. Indicate which scenario, 1 or 2, results in a greater pressure drop, and explain why.
The pressure drop for 2 is greater than that for 1; the compressibility of liquids is much lower than that of gases. During decompression, the volume of a gas increases in inverse proportion to its pressure, while under the same conditions the volume increase of a liquid is very small, resulting in a significant drop in pressure. The main reason for this phenomenon is the substantial difference in the forces acting between gas molecules compared to those in liquids.
Stay to study*, watch the experts’ analyses; personally, I think it’s debatable
Personal understanding: The conditions aren’t very clear; please forgive any inadequate analysis. If both devices operate under static pressure, then there should be no pressure drop, and pressure can be transmitted just as well in gases as in liquids； If it is in a flowing state, it depends on how the downstream side controls it. If we consider only pipe resistance, liquids certainly have a higher value than gases; therefore, the resistance for the second type of fully liquid flow must be even greater.