Journal of Engineering Thermophysics

, Volume 24, Issue 3, pp 259–269 | Cite as

Turbulent flow field analysis of a jet in cross flow by DNS

Article

Abstract

The turbulent flow field induced by a round jet in crossflow is calculated by parallel direct numerical simulation (DNS) on multi-GPU clusters. The DNS is based on the lattice- Boltzmannmethod.With currentGPUsettings, a grid systemof 1.5×108 is adopted and the largest jet Reynolds number reaches 3000. The jet is orthogonal to the mainstream flow direction. The validated code produces good agreements with theory and experiment. Steady and unsteady vortical structures are presented based on velocity fields and vorticity distributions. Profiles of Reynolds stress components are also displayed and analyzed. Hair-pin coherent structures are presented based on second invariant of velocity gradient. Transport of turbulent kinetic energy is represented by budget terms in x-, y- and z-direction planes and along the leading and trailing edges of jet trajectory.

Keywords

Turbulent Kinetic Energy Large Eddy Simulation Direct Numerical Simulation Lattice Boltzmann Method Cross Flow 

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Copyright information

© Pleiades Publishing, Ltd. 2015

Authors and Affiliations

  1. 1.State Key Laboratory for Strength and Vibration of Mechanical StructuresXi’an Jiaotong UniversityXi’anP.R. China
  2. 2.School of Mechanical EngineeringNorthwestern Polytechnical UniversityXi’anP.R. China
  3. 3.Department of Industrial EngineeringUniversity of ParmaParmaItaly

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