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Research Papers: Max Jacob Award Paper

Lateral Edge Effects on the Sherwood Number in Turbulent Flow Over a Flat Plate

[+] Author and Article Information
Matthew E. Taliaferro

Turbulent Convection Heat Transfer Laboratory,
Department of Mechanical Engineering,
University of Minnesota,
Minneapolis, MN 55113
e-mail: tali0009@umn.edu

Federico Fassio

Masdar (Abu Dhabi Future Energy Company),
Abu Dhabi 54115, United Arab Emirates

Fabio Gori

Professor
Laboratory of Thermo-Fluid Dynamics,
Department of Industrial Engineering,
University of Rome “Tor Vergata,”
Rome 1, 00133, Italy
e-mail: gori@uniroma2.it

Terrence W. Simon

Ernst G. Eckert Professor of
Mechanical Engineering
Turbulent Convective Heat Transfer Laboratory,
Department of Mechanical Engineering,
University of Minnesota,
Minneapolis, MN 55113
e-mail: simon002@umn.edu

Richard J. Goldstein

Regents' and James J. Ryan Professor of
Mechanical Engineering
Turbulent Convective Heat Transfer Laboratory,
Department of Mechanical Engineering,
University of Minnesota,
Minneapolis, MN 55113
e-mail: rjgme@umn.edu

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received December 12, 2016; final manuscript received May 16, 2017; published online August 29, 2017. Assoc. Editor: Jim A. Liburdy.

J. Heat Transfer 140(2), 023001 (Aug 29, 2017) (6 pages) Paper No: HT-16-1804; doi: 10.1115/1.4037497 History: Received December 12, 2016; Revised May 16, 2017

Experimental results for the Sherwood number variation near the lateral edge of the active surface of a smooth, finite-width flat plate in turbulent boundary layer flow are presented. Using naphthalene sublimation, local mass transfer rates are found for two different free stream velocities. A semi-empirical correlation of the experimental data is presented, allowing calculation of the increase of mass transfer near the edge and the size of the region affected by the lateral edge. The effect is shown to scale more so with the diffusion thickness than the boundary layer thickness.

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References

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Figures

Grahic Jump Location
Fig. 1

Sketch of test section in the wind tunnel, with exposed naphthalene surface and trip wire, dimensions in mm. Flow is left to right.

Grahic Jump Location
Fig. 2

Sketch of aluminum mold, all dimensions in mm, lid not shown

Grahic Jump Location
Fig. 3

Sublimation depth for the two free stream velocities at different streamwise locations. Symbols: • x = 11.8 mm, × x = 31.3 mm, ∘ x = 89.9 mm, and ◻ x = 129 mm: (a) U = 3.93 m s−1, 5374 s elapsed in the wind tunnel; (b) U = 13.6 m s−1, 7150 s elapsed in the wind tunnel.

Grahic Jump Location
Fig. 4

Sh normalized by Sh at the same streamwise location far from the lateral edge. All data from Reδ2=1030 experimental run are shown.

Grahic Jump Location
Fig. 5

Sketch showing the physical meaning of the diffusion thickness, adapted from Ref. [18]

Grahic Jump Location
Fig. 6

Comparison of experimentally determined z1.1/x and δ90/x with correlated values

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