Similar articles

Abstract: Gas-solid two-phase turbulent plane jet is applied to many natural situations and in engineering systems. To predict the particle dispersion in the gas jet is of great importance in industrial applications and in the designing of engineering systems. A large eddy simulation of the two-phase plane jet was conducted to investigate the particle dispersion patterns. The particles with Stokes numbers equal to 0.0028, 0.3, 2.5, 28 (corresponding to particle diameter 1 μm, 10 μm, 30 μm, 100 μm, respectively) in Re=11 300 gas flow were studied. The simulation results of gas phase motion agreed well with previous experimental results. And the simulation results of the solid particles motion showed that particles with different Stokes number have different spatial dispersion; and that particles with intermediate Stokes number have the largest dispersion ratio.

[1]Blümke, E., Brandt, M., Eickhoff, H. and Hassa, C.,1993.Particle dispersion in highly swirling turbulent flows. Part.Syst.Charact, 10:182-190.

[2]Cen, K. F. and Fan, J. R.,1989. A numerical model for the turbulent fluctuation and diffusion of gas-particle flows and its application in the freeboard of afluidized bed. Particle Science and Technology, 6(1).

[3]Crowe, C.T., Sharma, M.P. and Stock, D.E., 1977. The Particle-Source-in-CELL (PSI-CELL) for gas-droplet flows. J. Fluids Engr., 99:325-331.

[4]Fan, J.R., Zheng, Y.Q., Luo, Z.H. and Cen, K.F., 2001. Direct simulation of particle dispersion in a three-dimensional temporal mixing layer. Proceedings of the Royal Society of London Series A., 457:2151-2166.

[5]Ling, W., Chung, J.N., Troutt, T.R. and Crowe, C.T., 1998. Direct numerical simulation of a three-dimensional temporal mixing layer with particle dispersion. J. Fluid Mech., 358: 61-85.

[6]Reichardt,H., 1951.Gesetzmassigkeiten der freien turbulenz VCI forschung sheff. ZAMM,30:414.

[7]Smagorinsky, J.,1963. General circulation experiments with the primitive equation. Mon. Weather Rev.,91(3):99-164.

[8]Sohankar, A.,Norberg, C. and Davidson, L., 1999. Simulation of unsteady three-dimensional flow around a square cylinder at modeate Reynolds number. Phys. Fluids, 11(2): 99-165.

[9]Uijttewaal, W.S.J. and Oliemans, R.V.A.,1996. Particle dispersion and deposition in direct numerical and large eddy simulations of vertical pipe flows. Physics of Fluids, 8(10): 2590-2604.

[10]Wang, Q., Squires, K.D. and Simonin, O.,1998. Large eddy simulation of turbulent gas solid flows in a vertical chnnel and evaluation of second-order models. Int. J. Heat and Fluid Transfer, 19:505-511.

[11]Wen, F., Kamalu, N., Chung, J.N., Crowe, C.T. and Troutt, T.R., 1992. Particle dispersion by vortex structures in plane missing layer. ASME J. Fluids Engr., 114:657-666.

[12]Zha,X.D., Fan,J.R., Sun,P. and Cen,K.F., 2000. Numerical simulation on dense gas-particle riser flow. Journal of Zhejiang University SCIENCE, 1(1):27-28.

[13]Zheng Y.Q., 2001. Direct numerical simulation and experimental verification on the turbulent coherent structures in gas-particle two-phase mixing layer. Doctor dissertation of Zhejiang University, China(in Chinese).

[14]Zhou, Q. and Leschziner, M.A., 1996. Modelling Particle Dispersion in Anisotropic Turbulence. ECCOMAS 96. Wiley, New York,USA.

[15]Zhou, Q. and Yao, S.C., 1992. Group modeling of impacting spray dynamics. Int. J. Heat Mass Transf., 35:121-129.