AN ALGORITHM FOR TRACKING FLUID PARTICLES IN A SPECTRAL SIMULATION OF TURBULENT CHANNEL FLOW

被引:79
作者
KONTOMARIS, K [1 ]
HANRATTY, TJ [1 ]
MCLAUGHLIN, JB [1 ]
机构
[1] CLARKSON UNIV,DEPT CHEM ENGN,POTSDAM,NY 13676
基金
美国国家科学基金会;
关键词
D O I
10.1016/0021-9991(92)90398-I
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
The ability to follow individual fluid particles dispersing in a turbulent flow and to collect turbulence information along their trajectories is of key importance in many problems of practical and theoretical significance. With the availability of a direct numerical simulation of turbulence such information can be extracted directly from first principles without resorting to questionable assumptions. In this paper an algorithm for tracking fluid particles in a direct numerical simulation of turbulent channel flow is developed and tested. Fluid particle velocities are computed with an interpolation scheme that employs Lagrange polynomials of order 6 in the homogeneous directions of the channel and Chebyshev polynomials in the inhomogeneous normal direction. Errors in computed particle velocities and trajectories are assessed and it is shown that accurate single-particle Lagrangian statistics can be extracted both in the center and in the wall region of the channel. © 1992.
引用
收藏
页码:231 / 242
页数:12
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