(Note: This paper is included in Proceedings of 4th National Symposium on Multi-phase Flow, Non-Newtonian Flow, and Physicochemical Flow, sponsored by Chinese Society of Theoretical and Applied Mechanics, Chinese Petroleum Society, Chinese Society of Eng

(Note: This paper is included in Proceedings of 4th National Symposium on Multi-phase Flow, Non-Newtonian Flow, and Physicochemical Flow, sponsored by Chinese Society of Theoretical and Applied Mechanics, Chinese Petroleum Society, Chinese Society of Engineering Thermophysics, Chemical Industry and Engineering Society of China, Xi'an, 1993.)

NUMERICAL ANALYSIS OF MIGRATION IN NORMAL DIRECTION OF PARTICLES IN LAMINAR BOUNDARY LAYER OF GAS-SOLID SUSPENSION OVER A FLAT PLATE

(sponsored by China National Natural Science Fund)

Zhou Ji (Northwestern Polytechnical University), Qingsong Wu (University of Science and Technology of China), Boyi Wang (Institute of Mechanics, Chinese Academy of Sciences)

Abstract Finite difference method is applied to study the effect of migration in normal direction of particles in laminar boundary layer of gas-solid suspension over a flat plate. The influence of transversal force on flow parameters and characteristics of boundary layer is analyzed in particular. In the respect of difference method, switch-filter to eliminate the numerical oscillation is adopted.

Key words Gas-solid suspension, flat plate, transversal force

1 INTRODUCTION

2 BASIC ASSUMPTIONS AND GOVERNING EQUATIONS

3 NUMERICAL METHOD AND COMPUTAIONAL RESULTS

Figure 1 Profile of tangential velocity at x=1.0

Figure 2 Profile of normal velocity at x=1.0

Figure 3 Profile of temperature at x=1.0

Figure 4 Profile of density at x=1.0

Figure 5 Distribution of shear stress and heat flux on the surface

Figure 6 Distribution of displacement thickness of the boundary layer

Reference

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[3] Wang Boyi, Veselyi, S. L., Kulikovski, V. A. and Osiptsov, A. N., The distribution of particles in a shock-induced boudary layer of a dusty gas over a solid surface, Acta Mechanic Sinica, 1 (1991), 117-122

[4] Wu Qingsong and Wang Boyi, Numerical analysis of dust particle entrainment induced by shock wave, Proc. Inter. Symp. on Intense Dynamic Loading and Its Effects, Chengdu, June 9-12 (1992), 167-170

[5] Wang, B. Y., Glass, I. I., Compressible laminar boundary-layer flows of a dusty gas over a semi-infinite flat plate, J. Fluid Mech., 186 (1988), 223-241