Technical Briefs

On the Structure of a Plane Turbulent Wall Jet

[+] Author and Article Information
Mohammed A. Azim

Department of Mechanical Engineering,
Bangladesh University of Engineering and Technology,
Dhaka 1000, Bangladesh
e-mail: azim@me.buet.ac.bd

Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received July 29, 2012; final manuscript received March 28, 2013; published online June 5, 2013. Assoc. Editor: Mark F. Tachie.

J. Fluids Eng 135(8), 084502 (Jun 05, 2013) (4 pages) Paper No: FE-12-1350; doi: 10.1115/1.4024114 History: Received July 29, 2012; Revised March 28, 2013

The present study proposes two interactive eddy viscosities for the two layers of a plane wall jet where the influence of one layer is considered on the eddy viscosity of the other layer. Using these viscosities, the equations governing the wall jet flow are solved numerically. The flow structure extracted from the numerical solution is found in excellent agreement with the existing literature that justifies a two-layered structure of plane turbulent wall jet.

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Fig. 1

Schematic of a turbulent wall jet

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Fig. 2

Mean streamwise velocity profiles at x/h = 1

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Fig. 3

Growth of various flow widths

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Fig. 4

Streamwise decay of mean velocity maxima

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Fig. 5

Streamwise variation of friction velocity

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Fig. 6

Development of mean streamwise velocity

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Fig. 7

Mean streamwise velocity in inner scaling

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Fig. 8

Mean streamwise velocity in outer scaling

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Fig. 9

Mean transverse velocity in inner scaling

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Fig. 10

Mean transverse velocity in outer scaling

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Fig. 11

Reynolds shear stress in inner scaling

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Fig. 12

Reynolds shear stress in outer scaling




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