Abstract
To separate solid materials from suspensions, membranes have been used. However in such cases, the phenomena of concentration polarization on the surface of the membrane and the growth of gel layers and cake layers cannot be avoided. These phenomena deteriorate the efficiency of filtration. Creating a turbulence on the membrane surface is one of the effective ways of preventing these phenomena on the membrane surface. However, there are few detailed reports. In our previous report, the experimental and theoretical analyses of the cross-flow filtration of machining fluids were . examined and the effect of a turbulence promoter on the permeation flux was clarified. In this report, an experimental analysis of flow patterns occurring around a single circular flat plate, the simplest type of turbulence promoter, is examined. The relationships between the Reynolds number and the coefficient of loss, the coefficient of pressure and the coefficient of pressure fluctuation and flow patterns around the turbulence promoter obtained through flow visualization are examined.
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