二成分系水溶液中で回転する垂直氷円柱の融解挙動(熱工学,内燃機関,動力など)

概要

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The melting of a vertical ice cylinder into a homogeneous calcium chloride aqueous solution inside a cylindrical cavity is considered experimentally. The ice cylinder rotates with prescribed several speeds. The rotating speeds of the ice cylinder are 0, 35, 70 and 105rpm. Melting experiments are performed on several different initial conditions of the solution. When a rotating speed is fast, melting front shows specific configuration similar to a "Bamboo node" due to the Taylor vortex flow. When the rotating speed is slow, a specific "screw" shape appears on the melting front. This specific configuration appears due to large buoyancy caused by large concentration difference and due to circumferential flow caused by rotation of ice cylinder. The melting mass fraction increases with the passage of melting time and with increasing of rotating speed. Transient melting mass fraction is correlated to Fourier and rotating Reynolds numbers and melting ability of the solution calculated from the equilibrium phase diagram.
社団法人日本機械学会の論文
2008-12-25