Numerical investigations of heat transfer mechanisms in the forced laminar wall jet

Jürgen Seidel; Hermann F. Fasel

doi:10.1017/S0022112001005079

Numerical investigations of heat transfer mechanisms in the forced laminar wall jet

Jürgen Seidel, Hermann F. Fasel

Aerospace and Mechanical Engineering

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

11 Scopus citations

Abstract

The effect of high-amplitude forcing on a laminar wall jet over a heated flat plate is analysed. Highly accurate direct numerical simulations (DNS) are used to investigate the dominant transport mechanisms. When forcing is applied, the skin friction is reduced markedly and the wall heat transfer is increased. Detailed examination of the unsteady flow field showed that the concepts of eddy viscosity and eddy thermal diffusivity, usually applied to turbulent flows, can be applied to the analysis of unsteady laminar flows to explain the effect of highly unsteady phenomena.

Original language	English (US)
Pages (from-to)	191-215
Number of pages	25
Journal	Journal of Fluid Mechanics
Volume	442
DOIs	https://doi.org/10.1017/S0022112001005079
State	Published - Sep 10 2001

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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abstract = "The effect of high-amplitude forcing on a laminar wall jet over a heated flat plate is analysed. Highly accurate direct numerical simulations (DNS) are used to investigate the dominant transport mechanisms. When forcing is applied, the skin friction is reduced markedly and the wall heat transfer is increased. Detailed examination of the unsteady flow field showed that the concepts of eddy viscosity and eddy thermal diffusivity, usually applied to turbulent flows, can be applied to the analysis of unsteady laminar flows to explain the effect of highly unsteady phenomena.",

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AB - The effect of high-amplitude forcing on a laminar wall jet over a heated flat plate is analysed. Highly accurate direct numerical simulations (DNS) are used to investigate the dominant transport mechanisms. When forcing is applied, the skin friction is reduced markedly and the wall heat transfer is increased. Detailed examination of the unsteady flow field showed that the concepts of eddy viscosity and eddy thermal diffusivity, usually applied to turbulent flows, can be applied to the analysis of unsteady laminar flows to explain the effect of highly unsteady phenomena.

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Numerical investigations of heat transfer mechanisms in the forced laminar wall jet

Abstract

ASJC Scopus subject areas

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