EXPERIMENTAL AND NUMERICAL INVESTIGATIONS OF A TURBULENT BOUNDARY LAYER UNDER VARIABLE TEMPERATURE GRADIENTS

Amar Berkache; Salah Amroune; Ali Golbaf; Barhm Mohamad

doi:10.24874/jsscm.2022.16.01.01

Research paper

Published: 01.12.2021.

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https://doi.org/10.24874/jsscm.2022.16.01.01

EXPERIMENTAL AND NUMERICAL INVESTIGATIONS OF A TURBULENT BOUNDARY LAYER UNDER VARIABLE TEMPERATURE GRADIENTS

Abstract

In this article we present an experimental and numerical study of the behavior of the boundary layer type viscous flow in the presence of the thermal effect. The flow was held in a three-dimensional field with a uniform infinite velocity in the case of an adiabatic wall with heat input. The presented experimental work was performed in the Thermal Laboratory (LET) of the Prime Institute of Poitiers (France). It describes the analysis of a turbulent boundary layer created in a wind tunnel on the surface of a flat plate covered with epoxy resin. An HP 6012A power supply system was used to provide circulating heat flux to heat the flat plate to 80Â°C by the Joule effect. The numerical result shows a clear difference in the evolution of the thermal boundary layer between the three temperatures of the wall.

Keywords:

Infinite velocity,

turbulent boundary layer,

temperature gradient,

heat flux,

fluent

References

White FM. *Fluid mechanics*. 2011.

Wallace JM, Eckelmann H, Brodkey RS. The wall region in turbulent shear flow. *Journal of Fluid Mechanics*. 1972;54:39–48.

Head MR, Bandyopadhyay P. New aspects of turbulent boundary layer structure. *Journal of Fluid Mechanics*. 1981;107:297–338.

Klebanoff PS. *Characteristics of turbulence in a boundary layer with zero pressure gradient*. 1955.

Falco RE. New results, a review and synthesis of the mechanism of turbulence production in boundary layers and its modification. 1983;

Blackwelder RF, Kaplan RE. On the wall structure of turbulent boundary layer. *Journal of Fluid Mechanics*. 1976;76:89–112.

Kline SJ, Reynolds WC, Schraub FA, Runstadler PW. The structure of turbulent boundary layers. *Journal of Fluid Mechanics*. 1967;30:741–73.

Robinson SK. Coherent motions in the turbulent boundary layer. *Annual Review of Fluid Mechanics*. 1991;23:601–39.

Alameri SA, Alkaabi AK. *Nuclear reactor technology development and utilization*. 2020.

10.

Theodorsen T. Mechanism of turbulence. In: *Proceedings of the 2nd Midwest Conference on Fluid Mechanics*. 1952. p. 1-18 ,.

11.

Mohamad B, Ali M, Neamah H, Zelentsov A, Amroune S. Fluid dynamic and acoustic optimization methodology of a Formula Student race car engine exhaust system using multilevel numerical CFD models. *Diagnostyka*. 2020;21(3):103–11.

12.

Mohamad B, Károly J, Zelentsov A. Hangtompító akusztikai tervezése hibrid módszerrel. *Multidiszciplináris Tudományok*. 2019;9(4):548–55.

13.

Kähler CJ, Adrian RJ, Willert CE. Turbulent boundary layer investigations with conventional and stereoscopic particle image velocimetry. In: *Proceedings of the 8th International Symposium on Applications of Laser Techniques to Fluid Mechanics*. 1998. p. 11 1 1-11 1 8 ,.