Experimental Study of Flow around a Circular Cylinder inside a Bubble Plume

作     者：Tomomi Uchiyama Yukihiro Ishiguro Tomomi Uchiyama;Yukihiro Ishiguro

作者机构：Institute of Materials and Systems for Sustainability Nagoya University Furo-cho Nagoya Japan Graduate School of Information Science Nagoya University Furo-cho Nagoya Japan 

出 版 物：《Advances in Chemical Engineering and Science》 (化学工程与科学期刊（英文）)

年 卷 期：2016年第6卷第3期

页      面：269-280页

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）] 

主　　题：Bubble Plume Separated Shear Layer Cylinder Wake Flow Visualization PIV 

摘      要：This study experimentally explores the flow around a cylinder with circular cross-section placed inside a bubble plume. Small gas bubbles with diameter smaller than 0.06 mm are released from electrodes on the bottom of a water tank by electrolysis of water. The bubbles induce water flow around them as they rise because of buoyancy. Inside the generated bubble plume, a cylinder with diameter D of 30 mm is placed at 6.5D above the electrodes. The bubbles and water flow around the cylinder are visualized, and the bubble velocity distribution is measured. The experiments elucidate the bubble behavior around the cylinder, the separated shear layers originating at the cylinder surface, their roll-up, the bubble entrainment in the resultant large-scale eddies behind the cylinder, and the vortex shedding from the cylinder.