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International Heat Transfer Conference 7

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

SPANWISE MASS TRANSFER VARIATIONS ON A CYLINDER IN "NOMINALLY" UNIFORM CROSSFLOW

R. E. Mayle
Department of Mechanical Engineering Rensselaer Polytechnic Institute Troy, New York 12180-3590 USA

M. Marziale
Rensselaer Polytechnic Institute Troy, New York, USA

DOI: 10.1615/IHTC7.240
pages 135-140

Abstract

Mass transfer experiments on a circular cylinder in a "nominally" uniform crossflow are described. Experiments were conducted at the tunnel's turbulence level and with a woven-wire turbulence screen. In both cases spanwise and circumferential mass transfer measurements were made. Without the turbulence screen, the results were found to be spanwise independent and agreed quite well with both theory and the result of others.
In addition to the mass transfer measurements, spanwise traverse measurements of the mean velocity and turbulence quantities in the incident flow were made and showed that the screen produced a smallamplitude spanwise periodic perturbation in the incident flow. Although this perturbation was only one quarter of a percent in the mean velocity and buried in the stream's turbulence, disproportionately large spanwise variations of 15% were found in the mass transfer rate.

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