The present study investigates the influence of liquid properties and port position on draining characteristics from a square tank. Four different liquids, water, kerosene, glycerol 20%, and glycerol 60% are used. Three different port positions of a drainpipe of 9 mm id are used. Bubbly, slug, churn, elongated slug, and annular flow are observed in the drain port. Slug and bubbles never collide and rarely distorted for viscous dominated flow, whereas they collide and distort in inertia-dominated flow like draining of water, kerosene, glycerol 20% and glycerol 60%. Empirical correlations are proposed, which shows the time of draining depends on kinematic viscosity of the liquid and delays by the eccentric position of the port. Liquid height in tank found to be varied in quadratic nature with time.

本研究调查了液体性质和端口位置对方形水箱排水特性的影响。使用四种不同的液体：水，煤油，20％的甘油和60％的甘油。使用9 mm内径的排水管的三个不同端口位置。在排出口观察到气泡，团块，搅动，细长团块和环形流动。块状和气泡从不碰撞，也很少因粘性主导的流动而变形，而在惯性主导的流动中发生碰撞和变形，如排水，煤油，20％的甘油和60％的甘油。提出了经验相关性，该相关性表明排空时间取决于液体的运动粘度，并因端口的偏心位置而延迟。发现罐中的液体高度随时间呈二次性变化。