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Journal ArticleDOI

Turbulent boundary layer at low Reynolds number

L. P. Purtell, +2 more
- 01 May 1981 - 
- Vol. 24, Iss: 5, pp 802-811
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TLDR
The results of an experimental investigation of a turbulent boundary layer with zero-pressure gradient directed toward extending the data base at low Reynolds numbers are presented in this article, where the data obtained are concerned primarily with mean velocity distributions, skin-friction coefficients, and distributions of intensity of the longitudinal component of the turbulent velocity fluctuations for Reynolds numbers based on momentum thickness as low as 465.
Abstract
The results of an experimental investigation of a turbulent boundary layer with zero‐pressure gradient directed toward extending the data base at low Reynolds numbers are presented. The data obtained are concerned primarily with mean‐velocity distributions, skin‐friction coefficients, and distributions of intensity of the longitudinal‐component of the turbulent‐velocity fluctuations for Reynolds numbers based on momentum thickness as low as 465. The validity, at low Reynolds numbers, of the semi‐empirical laws characterizing the inner and outer regions of the boundary layer is examined.

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Journal ArticleDOI

New formulations of the temperature defect law for turbulent boundary layers on a plate

TL;DR: In this paper, a consistent asymptotic theory describing hydrodynamic and thermal turbulent boundary layers on a flat plate in zero pressure gradient is developed, where the flow depends on a limited number of governing parameters and algebraic closure conditions that relate the turbulent shear stress and turbulent heat flux to mean velocity and temperature gradients.
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Self-preservation of a Turbulent Boundary Layer over d-type Roughness *

TL;DR: In this paper, the effect of wall roughness on turbulence properties is investigated with respect to the similarity laws for the wall layer as well as the outer layer, and the wall similarity y u y U κ τ = ∂ ∂ to be applicable to the present rough wall boundary layer remaining the accepted value of Karman constant to be 0.41.

Instantaneous properties of a turbulent spot in a heated boundary layer

TL;DR: In this paper, the authors propose a novel approach to solve the problem of homonymity in homonym-pairing.1 CHAPTER 7.1.4.3.

Advanced k-epsilon modeling of heat transfer

Okey Kwon, +1 more
TL;DR: In this paper, two approaches to low Reynolds-number k-epsilon turbulence modeling are described, which formulate the eddy viscosity on the wall-normal component of turbulence and a length scale.