The use of turbulent inflow conditions for the modelling of high aspect ratio jet

G. De With; A.E. Holdo

doi:10.1016/j.fluiddyn.2005.08.005

The use of turbulent inflow conditions for the modelling of high aspect ratio jet

G. De With, A.E. Holdo

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

5 Citations (Scopus)

Abstract

The aim of this work is to investigate the capabilities of a turbulent inflow method. The application selected for this study is the high aspect ratio jet. The complexities associated to the numerical modelling of a high aspect ratio jet are embedded in its physical complexity. Consequently, the numerical modelling does not only require a high mesh resolution, but furthermore it requires a careful mesh construction, inflow conditions and subgrid-scale modelling to make an accurate computation of the unsteady flow phenomena. The results indicate that increased grid resolution and enhanced turbulence modelling reduce the effect of the imposed flow fluctuations. It is concluded that for a high aspect ratio free-jet turbulent inflow conditions are effective if the mesh resolution is insufficient to trigger shear-layer instabilities. Applied with sufficient mesh resolution the onset of vortex motions will occur in the shear layer, hence there is limited inflow sensitivity.

Original language	English
Pages (from-to)	443-461
Journal	Fluid Dynamics Research
Volume	37
Issue number	6
DOIs	https://doi.org/10.1016/j.fluiddyn.2005.08.005
Publication status	Published - 2005

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10.1016/j.fluiddyn.2005.08.005

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title = "The use of turbulent inflow conditions for the modelling of high aspect ratio jet",

abstract = "The aim of this work is to investigate the capabilities of a turbulent inflow method. The application selected for this study is the high aspect ratio jet. The complexities associated to the numerical modelling of a high aspect ratio jet are embedded in its physical complexity. Consequently, the numerical modelling does not only require a high mesh resolution, but furthermore it requires a careful mesh construction, inflow conditions and subgrid-scale modelling to make an accurate computation of the unsteady flow phenomena. The results indicate that increased grid resolution and enhanced turbulence modelling reduce the effect of the imposed flow fluctuations. It is concluded that for a high aspect ratio free-jet turbulent inflow conditions are effective if the mesh resolution is insufficient to trigger shear-layer instabilities. Applied with sufficient mesh resolution the onset of vortex motions will occur in the shear layer, hence there is limited inflow sensitivity.",

author = "{De With}, G. and A.E. Holdo",

note = "Original article can be found at: http://www.sciencedirect.com/science/journal/01695983 Copyright The Japan Society of Fluid Mechanics Incorporated and Elsevier B.V. DOI: 10.1016/j.fluiddyn.2005.08.005 [Full text of this article is not available in the UHRA]",

year = "2005",

doi = "10.1016/j.fluiddyn.2005.08.005",

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journal = "Fluid Dynamics Research",

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TY - JOUR

T1 - The use of turbulent inflow conditions for the modelling of high aspect ratio jet

AU - De With, G.

AU - Holdo, A.E.

N1 - Original article can be found at: http://www.sciencedirect.com/science/journal/01695983 Copyright The Japan Society of Fluid Mechanics Incorporated and Elsevier B.V. DOI: 10.1016/j.fluiddyn.2005.08.005 [Full text of this article is not available in the UHRA]

PY - 2005

Y1 - 2005

N2 - The aim of this work is to investigate the capabilities of a turbulent inflow method. The application selected for this study is the high aspect ratio jet. The complexities associated to the numerical modelling of a high aspect ratio jet are embedded in its physical complexity. Consequently, the numerical modelling does not only require a high mesh resolution, but furthermore it requires a careful mesh construction, inflow conditions and subgrid-scale modelling to make an accurate computation of the unsteady flow phenomena. The results indicate that increased grid resolution and enhanced turbulence modelling reduce the effect of the imposed flow fluctuations. It is concluded that for a high aspect ratio free-jet turbulent inflow conditions are effective if the mesh resolution is insufficient to trigger shear-layer instabilities. Applied with sufficient mesh resolution the onset of vortex motions will occur in the shear layer, hence there is limited inflow sensitivity.

AB - The aim of this work is to investigate the capabilities of a turbulent inflow method. The application selected for this study is the high aspect ratio jet. The complexities associated to the numerical modelling of a high aspect ratio jet are embedded in its physical complexity. Consequently, the numerical modelling does not only require a high mesh resolution, but furthermore it requires a careful mesh construction, inflow conditions and subgrid-scale modelling to make an accurate computation of the unsteady flow phenomena. The results indicate that increased grid resolution and enhanced turbulence modelling reduce the effect of the imposed flow fluctuations. It is concluded that for a high aspect ratio free-jet turbulent inflow conditions are effective if the mesh resolution is insufficient to trigger shear-layer instabilities. Applied with sufficient mesh resolution the onset of vortex motions will occur in the shear layer, hence there is limited inflow sensitivity.

U2 - 10.1016/j.fluiddyn.2005.08.005

DO - 10.1016/j.fluiddyn.2005.08.005

M3 - Article

SN - 0169-5983

VL - 37

SP - 443

EP - 461

JO - Fluid Dynamics Research

JF - Fluid Dynamics Research

IS - 6

ER -

The use of turbulent inflow conditions for the modelling of high aspect ratio jet

Abstract

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