LES of turbulent jet in cross-flow: Part 1 – A numerical validation study

Dalibor Cavar; Knud Erik Meyer

doi:10.1016/j.ijheatfluidflow.2011.12.009

LES of turbulent jet in cross-flow: Part 1 – A numerical validation study

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Abstract

The paper presents results of a LES based numerical simulation of the turbulent jet-in-cross-flow (JICF) flowfield, with Reynolds number based on cross-flow velocity and jet diameter Re=2400 and jet-to-cross-flow velocity ratio of R=3.3. The JICF flow case has been investigated in great detail, involving conduction of two independent precursor simulations, prior to the main JICF simulation, as the considered case has turbulent inflow conditions on both jet and cross-stream side. The LES results are directly compared to pointwise Laser Doppler Anemometry (LDA) measurements, showing a very good agreement on the level of various statistical quantities in all flow regions but the immediate jet-to-cross-flow exhaustion zone. Several LES computations involving grids of up to 15million grid points have been conducted, showing no improvement in the agreement between numerical results and measurements, possibly indicating a LDA measurement problem in this particular region.

Original language	English
Journal	International Journal of Heat and Fluid Flow
Volume	36
Pages (from-to)	18-34
ISSN	0142-727X
DOIs	https://doi.org/10.1016/j.ijheatfluidflow.2011.12.009
Publication status	Published - 2012

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@article{d0f650873812437885ddd993c1e3dac2,

title = "LES of turbulent jet in cross-flow: Part 1 – A numerical validation study",

abstract = "The paper presents results of a LES based numerical simulation of the turbulent jet-in-cross-flow (JICF) flowfield, with Reynolds number based on cross-flow velocity and jet diameter Re=2400 and jet-to-cross-flow velocity ratio of R=3.3. The JICF flow case has been investigated in great detail, involving conduction of two independent precursor simulations, prior to the main JICF simulation, as the considered case has turbulent inflow conditions on both jet and cross-stream side. The LES results are directly compared to pointwise Laser Doppler Anemometry (LDA) measurements, showing a very good agreement on the level of various statistical quantities in all flow regions but the immediate jet-to-cross-flow exhaustion zone. Several LES computations involving grids of up to 15million grid points have been conducted, showing no improvement in the agreement between numerical results and measurements, possibly indicating a LDA measurement problem in this particular region.",

author = "Dalibor Cavar and Meyer, \{Knud Erik\}",

year = "2012",

doi = "10.1016/j.ijheatfluidflow.2011.12.009",

language = "English",

volume = "36",

pages = "18--34",

journal = "International Journal of Heat and Fluid Flow",

issn = "0142-727X",

publisher = "Elsevier",

}

TY - JOUR

T1 - LES of turbulent jet in cross-flow: Part 1 – A numerical validation study

AU - Cavar, Dalibor

AU - Meyer, Knud Erik

PY - 2012

Y1 - 2012

N2 - The paper presents results of a LES based numerical simulation of the turbulent jet-in-cross-flow (JICF) flowfield, with Reynolds number based on cross-flow velocity and jet diameter Re=2400 and jet-to-cross-flow velocity ratio of R=3.3. The JICF flow case has been investigated in great detail, involving conduction of two independent precursor simulations, prior to the main JICF simulation, as the considered case has turbulent inflow conditions on both jet and cross-stream side. The LES results are directly compared to pointwise Laser Doppler Anemometry (LDA) measurements, showing a very good agreement on the level of various statistical quantities in all flow regions but the immediate jet-to-cross-flow exhaustion zone. Several LES computations involving grids of up to 15million grid points have been conducted, showing no improvement in the agreement between numerical results and measurements, possibly indicating a LDA measurement problem in this particular region.

AB - The paper presents results of a LES based numerical simulation of the turbulent jet-in-cross-flow (JICF) flowfield, with Reynolds number based on cross-flow velocity and jet diameter Re=2400 and jet-to-cross-flow velocity ratio of R=3.3. The JICF flow case has been investigated in great detail, involving conduction of two independent precursor simulations, prior to the main JICF simulation, as the considered case has turbulent inflow conditions on both jet and cross-stream side. The LES results are directly compared to pointwise Laser Doppler Anemometry (LDA) measurements, showing a very good agreement on the level of various statistical quantities in all flow regions but the immediate jet-to-cross-flow exhaustion zone. Several LES computations involving grids of up to 15million grid points have been conducted, showing no improvement in the agreement between numerical results and measurements, possibly indicating a LDA measurement problem in this particular region.

U2 - 10.1016/j.ijheatfluidflow.2011.12.009

DO - 10.1016/j.ijheatfluidflow.2011.12.009

M3 - Journal article

SN - 0142-727X

VL - 36

SP - 18

EP - 34

JO - International Journal of Heat and Fluid Flow

JF - International Journal of Heat and Fluid Flow

ER -

LES of turbulent jet in cross-flow: Part 1 – A numerical validation study

Abstract

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