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Lateral edge effects on heat/mass transfer on a finite width surface within a turbulent boundary layer

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posted on 17.04.2019 by Matteo Angelino, Richard J. Goldstein, Fabio Gori
Numerical simulations of the local heat/mass transfer on a finite width surface within a turbulent boundary layer are presented. Different approaches to the RANS modelling of the turbulent heat/mass flux are compared to Large Eddy Simulations (LES). Mass transfer experiments conducted with the naphthalene sublimation technique are used as validation. The isotropic eddy viscosity model, Simple Gradient Diffusion Hypothesis (SGDH), is shown to underestimate the span-wise effects. Its anisotropic extension, Generalized Gradient Diffusion Hypothesis (GGDH), improves the prediction, but still does not account for near-wall contribution in strongly dissimilar velocity and temperature/concentration fields, even in combination with a wall-sensitive second-moment closure model such as the Elliptic Blending Reynolds Stress Model (EB-RSM). A more complete turbulent heat flux model based on the elliptic blending approach, the Elliptic Blending GGDH (EB-GGDH) presents very good agreement with LES and with the experiments, confirming the need for more advanced turbulent heat flux modelling in applications with strong three-dimensional effects.

Funding

University of Minnesota and the University of Rome Tor Vergata.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Aeronautical and Automotive Engineering

Published in

International Journal of Heat and Mass Transfer

Volume

138

Pages

32 - 40

Citation

ANGELINO, M., GOLDSTEIN, R.J. and GORI, F., 2019. Lateral edge effects on heat/mass transfer on a finite width surface within a turbulent boundary layer. International Journal of Heat and Mass Transfer, 138, pp.32-40.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publisher statement

This paper was accepted for publication in the journal International Journal of Heat and Mass Transfer and the definitive published version is available at https://doi.org/10.1016/j.ijheatmasstransfer.2019.04.016.

Acceptance date

03/04/2019

Publication date

2019-04-12

ISSN

0017-9310

Language

en

Exports