International Journal of Numerical Analysis and Modeling, ( ISI ), Volume (7), No (1), Year (2010-4) , Pages (173-193)

Title : ( DNS OF FORCED MIXING LAYER )

Authors: Mohammad Javad Maghrebi , A. Zarghami student ,

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Abstract

The non-dimensional form of Navier-Stokes equations for two dimensional mixing layer °ow are solved using direct numerical simulation. The governing equations are discretized in streamwise and cross stream direction using a sixth order compact ¯nite difference scheme and a mapped compact ¯finite di®erence method, respectively. A tangent mapping of y = ¯ tan(¼³=2) is used to relate the physical domain of y to the computational domain of ³. The third order Runge-Kutta method is used for the time-advancement purpose. The convective out°ow boundary condition is employed to create a non-reflective type boundary condition at the outlet. An inviscid (Stuart °ow) and a completely viscous solution of the Navier-Stokes equations are used for verification of the numerical simulation. The numerical results show a very good accuracy and agreement with the exact solution of the Navier-Stokes equation. The results of mixing layer simulation also indicate that the time traces of the velocity components are periodic. Results in self-similar coordinate were also investigated which indicate that the time-averaged statistics for velocity, vorticity, turbulence intensities and Reynolds stress distribution tend to collapse on top of each other at the °ow downstream locations.

Keywords

, Mixing Layer, Compact Finite Difference, Mapped Finite Difference, Self-Similarity.
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@article{paperid:1023968,
author = {Maghrebi, Mohammad Javad and A. Zarghami Student},
title = {DNS OF FORCED MIXING LAYER},
journal = {International Journal of Numerical Analysis and Modeling},
year = {2010},
volume = {7},
number = {1},
month = {April},
issn = {1705-5105},
pages = {173--193},
numpages = {20},
keywords = {Mixing Layer; Compact Finite Difference; Mapped Finite Difference; Self-Similarity.},
}

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%0 Journal Article
%T DNS OF FORCED MIXING LAYER
%A Maghrebi, Mohammad Javad
%A A. Zarghami Student
%J International Journal of Numerical Analysis and Modeling
%@ 1705-5105
%D 2010

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