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International Heat Transfer Conference 9

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

MASS TRANSFER FROM A CIRCULAR CYLINDER IN AN APPROACHING UNIFORM SHEAR FLOW

Hyung Jin Sung
Department of Mechanical Engineering, KAIST 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Korea

Myung Seok Lyu
Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology P.O. Box 150, Cheongyang, Seoul, Korea

Myung Kyoon Chung
Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology P.O. Box 150, Cheongyang, Seoul, Korea

DOI: 10.1615/IHTC9.2220
pages 371-376

Abstrakt

A naphthalene sublimation technique is used to investigate mass transfer from a circular cylinder in a turbulent uniform shear flow. Experiments are performed in a wind tunnel with a shear flow generator. The rate of shear and the mean flow Reynolds number are varied to study their effects on the mass transfer. It is found that the distribution of the local mass transfer rate on a circular cylinder is characterized with a shear parameter Kd (S·d/Uc), where S is the shear rate, d is the diameter of circular cylinder and Uc is the centerline mean velocity. The angular position at which the Sherwood number is minimum approximately proportional to the shear parameter on both the upper and the lower surfaces of the cylinder. The overall mass transfer rate is not significantly dependent on Kd in the range of the present mearsurements 0<Kd≤0.132 , but strongly dependent on the centerline mean Reynolds number.

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