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Journal of Enhanced Heat Transfer
Fator do impacto: 1.406 FI de cinco anos: 1.075 SJR: 0.287 SNIP: 0.653 CiteScore™: 1.2

ISSN Imprimir: 1065-5131
ISSN On-line: 1563-5074

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Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v14.i1.50
pages 77-91

Effect of a Rotating Flow Field on Boiling Heat Transfer from a Flat Surface

Ajoy Kumar Das
Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur-721302; Mechanical Engineering Department, National Institute of Technology Agartala, Agartala, Tripura, 799055, INDIA
Prasanta Kumar Das
Department of Mechanical Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
P. Saha
Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur-721302, India

RESUMO

The present work reports the effect of fluid rotation on boiling heat transfer (BHT) from a plane horizontal surface. Boiling on a copper plate was studied in a pool of distilled water under atmospheric pressure. A stirrer placed normal to the heater surface was used to create fluid rotation. Though BHT increases with the increase of rotational speed at low rpm it falls drastically with further increase of rpm. Through visualization and conductivity probe technique it has been seen that at low rotational speed radial inward sliding of vapor bubbles increases the rate of heat transfer while adherence of a thick vapor layer on the heater surface at high rotational speed reduces the rate of heat transfer drastically.


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