LES of Normally Impinging Elliptic Air-Jet Heat Transfer at Re=4400

LES of Normally Impinging Elliptic Air-Jet Heat Transfer at Re=4400

Year:    2017

Author:    Yongping Li, Qizhao Lin, Zuojin Zhu

Advances in Applied Mathematics and Mechanics, Vol. 9 (2017), Iss. 2 : pp. 485–500

Abstract

Jet impingement induced heat transfer is an important issue in engineering science. This paper presents results of large eddy simulation (LES) of normally impinging elliptic air-jet heat transfer at a Reynolds number of 4400, with orifice-to-plate distance fixed to be 5 in the unit of jet nozzle effective diameter $D (=√ab)$. The elliptic aspect ratio ($a/b$) is 3/2. While the target wall is heated under some condition of constant heat flux. The LES are carried out using dynamic subgrid model and Open-FOAM. The distributions of mean velocity components, velocity fluctuations, and subgrid stresses in vertical and radial directions, and the Nusselt numbers involving heat transfer through the target wall are discussed. The comparison with existing experimental and numerical results shows good agreement.

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Journal Article Details

Publisher Name:    Global Science Press

Language:    English

DOI:    https://doi.org/10.4208/aamm.2015.m1078

Advances in Applied Mathematics and Mechanics, Vol. 9 (2017), Iss. 2 : pp. 485–500

Published online:    2017-01

AMS Subject Headings:    Global Science Press

Copyright:    COPYRIGHT: © Global Science Press

Pages:    16

Keywords:    Large eddy simulation impinging air-jet orifice-to-plate distance subgrid heat flux elliptic aspect ratio.

Author Details

Yongping Li

Qizhao Lin

Zuojin Zhu