Browse > Article

A Study on Delay and Modification in Predicting Turbulence Flow in PISG Algorithm  

Lee J. W. (한국화약)
Ryou H. S. (중앙대학교 기계공학부)
Kang K. G. (중앙대학교 대학원 기계공학과)
Publication Information
Journal of computational fluids engineering / v.7, no.1, 2002 , pp. 1-9 More about this Journal
Abstract
In this paper, a modification of PISO algorithm based on standard k-ε turbulence model was proposed. The numerical technique used in this research is finite volume method, hybrid scheme for discretizing convection term, Euler implicit scheme for discretizing time term, and non-staggered grid. The basic idea of the modification of PISO algorithm is to perform an additional corrector stage for turbulence kinetic energy and dissipation rate to correct the inconsistence of flow and turbulence. In order to validate this algorithm, simulation of flow around a square cylinder (Re=3000) was performed in two-dimensional case. The results obtained from the proposed scheme show better agreement with those from the experiment than using original PISO algorithm in coherent velocity field.
Keywords
Square Cylinder; Turbulent Kinetic Energy;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Patankar S.V., NumericaI heat transfer and fluid ftow, McGraw-Hill, Washington D.C., (1980)
2 Issa R.I, 'Solution of the Implicitly Discretised fluid Flow Equations bv Operator-Splitting', J. Computational Physics, Vol. 62, pp. 40-65, 1985
3 Choi H. and Moin P., 'Effects of the computational time step on numehcal solution of turbulent flow', J. Comp. Phys, vol 113, pp. 1-4, 1994
4 Saha A.K., Biswas G. and Muralidhar K., 'Numerical study of the turbulent unsteady wake behind partially Enclosed square cylinder using RANS' Compt. Methods Appl. Mech Engrg, Vol. 178, pp. 323-341, 1999
5 Kim J. and Moin P. 'Application of a fractional step method in incompressible Navier-Stokes equations', J. Comp. Phys., Vol 59, pp. 308-323, 1985
6 Nakagawa S., Nitta K. and Senda M., 'An expehmental study on unsteady turbulent near wake of a rectangular cylinder in the channel flow', Experiments in Fluids, vol. 27, pp. 284-294, 1999