Measurement and Numerical Simulation of Flows between Bubbles and Membranes for Understanding Mechanism of Membrane Cleaning

Research Project

Project/Area Number	25820047
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Multi-year Fund
Research Field	Fluid engineering
Research Institution	Kobe University
Principal Investigator	HAYASHI Kosuke 神戸大学, 工学(系)研究科(研究院), 准教授 (60455152)
Project Period (FY)	2013-04-01 – 2015-03-31
Project Status	Completed (Fiscal Year 2014)
Budget Amount *help	¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000) Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000) Fiscal Year 2013: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Keywords	流体工学 / 水資源 / 混相流 / 気泡
Outline of Final Research Achievements	Measurements of cleaning processes due to bubble rising motion and numerical simulations for the bubble motion to investigate the mechanism of membrane cleaning. As a result, the following conclusions are obtained: (1) bubbles sliding on the membrane surface possess much larger cleaning efficiency compared to bubbles wobbling apart from the surface, (2) the cleaning efficiency does not increase even with increasing the gas flow rate for gas flow rates larger than a certain critical value, and (3) a numerical method based on the interface tracking method and GPGPU has been developed.

Report

(3 results)