期刊
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
卷 150, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijmultiphaseflow.2022.104001
关键词
Liquid draining; Square tank; VOF; OpenFOAM; Vortex; CFD
类别
The present study investigates the interfacial dynamics and flow behavior of water and oil-water in a storage tank pipe. The results show that water and oil-water have different free surface widths during draining, with the oil-water case prone to the formation of air bubbles. Additionally, there is a zone of velocity de-acceleration in the central part of the drain pipe, and velocity and pressure fluctuations are observed at the inlet of the drain port.
The present study investigates the interfacial dynamics in case water and oil-water drain through a storage tank pipe. The tank has a square cross-section and is connected with a drain port at the bottom of the tank of diameter 0.009 m. Different eccentric positions are also considered. OpenFOAM software is used to analyze the liquid draining situation. A 3D numerical model is used to simulate the liquid draining situation. The VOF model is used to track the interface. Free surface in water draining is narrower than that in oil-water draining. At the extreme eccentric port of e0.96, the oil-water case leads to the formation of air bubbles from the vortex tip inside the tank. In the case of water draining, a zone of velocity de-acceleration was noticed at the central part of the drain pipe for e0. Velocity and pressure fluctuations are noted at the inlet of the drain port; however, reverse flow is not observed. Reverse flow in water draining was observed at e 0.96. The opposite is the trend for oil-water draining. A flow reversal is noted after the initiation of three-phase flow inside the drainpipe at e 0. However, since threephase flow was initiated early in the tank for e 0.96, reverse flow is not noticed inside the drain pipe.
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