Heat Transfer from an ESF Radial Plate Clutch Surface Part II - Theory

In this paper half of a radial electro-structured fluid (ESF) clutch with vertical axis, consisting of a lower stationary disc and upper rotating disc is examined for constant speed of rotation. The narrow gap between the discs is filled with a viscous liquid, so electro-rheological effect is not taken into consideration. Frictional tangential forces in the fluid generate heat which is transferred through the fluid and rotating disc (by conduction) into surrounding air (by convection). A steady state model of heat transfer for the system in question is built up and solved to enable the establishment of heat transfer prediction to be achieved. Several novelties in approach and solution relative to existing ones are adopted and realized. For some particular cases theoretical results are compared with experimental values by means of a table graphically and a good agreement is achieved. The paper is the second part of a double paper, the first part of which is focused more upon general philosophy and experimental side of the problem in question.