Experimental studies on motion of falling flat thin disk inside liquid

Pole, Ramu and Karri, Badarinath (2018) Experimental studies on motion of falling flat thin disk inside liquid. Masters thesis, Indian Institute of Technology Hyderabad.

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Abstract

This thesis is about experimental study on falling flat thin disks inside liquid and observing various possible paths of such disks. Based on few non dimensional numbers, i.e. Reynolds number (Re), dimensionless moment of inertia (I∗), and aspect ratio, this motion was classified into four types, which are steady falling, periodic, chaotic and tumbling motions. In this work, flat thin disks were made of three different types of materials, i.e. Aluminum, Steel, and Copper. Here Aluminum is a low density material and steel, copper are high density materials. To vary the viscosity of the surrounding medium, three different fluids were used, namely pure water, 50% water mixed with 50% glycerol liquid and 40% water mixed with 60% glycerol solution. Based on the results obtained, we constructed a phase diagram between Dimensionless moment of inertia and Reynolds number.

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