Title: How many secondary flows are in 'Leonard's vertical slot'?

Authors: Weiwei Jin, Yaling He, Wen-Quan Tao

Addresses: State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, China; School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai, China. ' State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, China. ' State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, China

Abstract: The preconditioned TFQMR algorithm of the Krylov subspace method is implemented into SIMPLER as the inner-iteration method. In order to compare with Leonard and Drummond|s results, QUICK and PWL schemes are applied respectively to solve the two-dimensional natural convection in a vertical tall cavity. From simulation results at very fine grids, it is found that although there are only minor difference in the Nusselt numbers, the numbers of secondary flows in that tall slot is not definite, being 11 or 12 depending on the computational conditions.

Keywords: Krylov subspace methods; preconditioning TFQMR method; natural convection; Leonard|s vertical slot; simulation; secondary flows.

DOI: 10.1504/PCFD.2009.024830

Progress in Computational Fluid Dynamics, An International Journal, 2009 Vol.9 No.3/4/5, pp.282 - 291

Published online: 01 May 2009 *

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