Quasi-Static Heat Transfer in an Experimental Device with a Radial Electro-Structured Fluid Clutch

Abstract

In the paper an experimental device with upper 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-structural 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 in nondimensional form is built up and solved. Several novelties in approach and solution relative to existing ones are adopted and realized (described in detail in 5 appendices).

Analysis of influence of the system parameters upon results of solution is given. For some particular cases theoretical results are compared with experimental ones by means of tables and diagrams and very good agreement is pointed out.

Keywords

radial clutch quasi-static heat transfer analytical model comparison with experiments

Get full access to this article

View all access options for this article.

References

Dorfman, L.A. 1963. Hydrodynamic Resistance and the Heat Loss of Rotating Solids, (Translation from Russian), Oliver & Boyd Ltd., Edinburgh and London.

Ellam, D.J. , Bullough, W.A. and Oravský, V. 2002. “Heat Transfer from an ESF Radial Plate Clutch Surface.” In: Bossis, G. (Ed.), Proceedings of the 8th Int. Conf. on Electro-rheological Fluids and Magneto-rheological Suspensions, Nice 2001, World Scientific, Singapore, pp. 104-110.

Kreith, F. 1968. “Convection Heat Transfer in Rotating Systems,” Advances in Heat Transfer, 5:129-246.

Kirk, J. 1999. “Heat Transfer Through an Electro-rheological Radial Clutch,” Undergraduate Thesis, University of Sheffield, Sheffield.

Nosek, M. 1998. “Heat Transfer Through an Electro-rheological Radial Clutch,” Undergraduate Thesis, University of Sheffield, Sheffield.

Oravský, V. 2000. “Unified Dynamic Model of Concentric and Radial ER Clutches Including Heat Transfer.” In: Tao, R. (Ed.), Proceedings of the 7th Int. Conf. on Electro-rheological Fluids and Magneto-rheological Suspensions, World Scientific, Singapore, pp. 827-838.

Oravský, V. 2002. “Heat Transfer from an ESF Radial Plate Clutch Surface, Part 2 - Theory.” In: Bossis, G. (Ed.), In: Proceedings of the 8th Int. Conf. on Electro-Rheological Fluids and Magneto-Rheological Suspensions, Nice 2001, World Scientific, Singapore, pp. 673-679.

Oravský, V. 2003. “Unified Quasi-static Model of Heat Transfer for both Concentric and Radial Electro-rheological Clutches,” (to be submitted to the J. Intelligent Material Systems and Structures).

Shell Tellus Oils 2000 UOCS/3.

10.

Smyth, R. , Tau, K.H. and Bullough, W.A. 1994. “Heat Transfer Modelling of a Cylindrical ER Clutch,” J. Modern Physics B, (8):3033-3050.

11.

Welty, J.R. , Wicke, Ch.E. and Wilson, R.E. 1984. Fundamentals of Momentum, Heat and Mass Transfer, 3rd Edn. John Willey & Sons, New York.

12.

Whittle, M. , Atkin, R.J. and Bullough, W.A. 1998. “Dynamics of a Radial Electro-rheological Clutch.” In: Nakano, M. and Koyama, K. (Eds), Proceedings of the 6th Int. Conf. on Electro-rheological Fluids, Magneto-rheological Suspensions and Their Applications, Yonezawa, Japan 1997, World Scientific, Singapore, pp. 641-648.

13.

Wong, H.Y. 1977. Handbook of Essential Formulae and Data on Heat Transfer for Engineers, Longmans, London & New York.