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Large Eddy Simulation of multiple jets into a cross flow

Ramezanizadeh, M ; Sharif University of Technology | 2007

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  1. Type of Document: Article
  2. Publisher: Sharif University of Technology , 2007
  3. Abstract:
  4. Multiple square cross section jets into a cross flow at three different velocity ratios, namely 0.5, 1.0 and 1.5, have been computationally simulated, using the Large Eddy Simulation (LES) approach. The finite volume method is applied in the computational methodologies, using an unsteady SIMPLE algorithm and employing a non-uniform staggered grid. All spatial and temporal terms in the Navier-Stokes equations have been discretized using the Power-Law and Crank-Nicolson schemes, respectively. Mean velocity profiles at different X-locations are compared with the existing experimental and Reynolds Averaged Navier-Stokes (RANS) computational results. Although the RANS computations require much fewer computational resources than the LES, the authors' results show reasonably good agreement with existing experimental results, rather than the computational ones. It is shown that, by increasing the velocity ratio, the jet penetration into the cross flow is increased, accompanied by a high mixing with the cross flow. In addition, the formation of counter rotating vortex pairs after the jet enters the cross flow is explained and its behavior in different Y Z-planes is investigated. © Sharif University of Technology, June 2007
  5. Keywords:
  6. Computational fluid dynamics ; Computer simulation ; Finite volume method ; Large eddy simulation ; Navier Stokes equations ; Vortex flow ; Cross flow ; Power law ; Reynolds averaged Navier-Stokes (RANS) equation ; Jets ; Velocity distribution ; Navier-Stokes equations
  7. Source: Scientia Iranica ; Volume 14, Issue 3 , 2007 , Pages 240-250 ; 10263098 (ISSN)
  8. URL: http://scientiairanica.sharif.edu/article_2771.html