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

J. Lei; X. Wang; G. Xie; G. Lorenzini

doi:10.1134/S1810232815030078

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

J. Lei
, X. Wang
, G. Xie
, G. Lorenzini

School of Marine Science and Technology

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

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.

Original language	English
Pages (from-to)	259-269
Number of pages	11
Journal	Journal of Engineering Thermophysics
Volume	24
Issue number	3
DOIs	https://doi.org/10.1134/S1810232815030078
State	Published - 29 Jul 2015

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title = "Turbulent flow field analysis of a jet in cross flow by DNS",

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.",

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AU - Lei, J.

AU - Wang, X.

AU - Xie, G.

AU - Lorenzini, G.

PY - 2015/7/29

Y1 - 2015/7/29

N2 - 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.

AB - 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.

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

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