ライブラリ登録: Guest
Begell Digital Portal Begellデジタルライブラリー 電子書籍 ジャーナル 参考文献と会報 リサーチ集
Journal of Enhanced Heat Transfer
インパクトファクター: 0.562 5年インパクトファクター: 0.605 SJR: 0.175 SNIP: 0.361 CiteScore™: 0.33

ISSN 印刷: 1065-5131
ISSN オンライン: 1026-5511

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v13.i3.10
pages 197-214

Heat Transfer Enhancement in Annular Stokes Flows

Antonio Jose Silveiro Rodrigo
Departamento de Quimica, Centro de Quimica Fina e Biotecnologia, Faculdade de Ciencias e Tecnologia, Universidade Nova de Lisboa, 2829-516, Caparica, Portugal
Jose Paulo Barbosa Mota
Departamento de Quimica, Centro de Quimica Fina e Biotecnologia, Faculdade de Ciencias e Tecnologia, Universidade Nova de Lisboa, 2829-516, Caparica, Portugal
R. C. R. Rodrigues
Departamento de Quimica, Centro de Quimica Fina e Biotecnologia, Faculdade de Ciencias e Tecnologia, Universidade Nova de Lisboa, 2829-516, Caparica, Portugal
Esteban Saatdjian
LEMTA GDR 681: Chaos Lagrangien 3-D, 2 ave. de la forêt de Haye, BP 160, 54504 Vandoeuvre Cédex, France

要約

The rate of heat transfer into highly viscous fluids can be enhanced significantly by chaotic advection in both batch and continuous processes where the flow is dominated by viscous forces. In batch operations, such as liquid flow between concentric, rotating cylinders, the heat transfer rate is first increased by a geometry modification which creates a vortex zone. This is achieved simply by moving the inner cylinder into an eccentric position, thus separating the flow into two or more independent zones. Afterwards, by varying time-periodically the angular velocity of one boundary, while the other one moves at constant velocity, fluid can be transported from one flow zone into another. This is the mechanism of chaotic advection and leads to a further rise in the heat transfer rate if the modulation is appropriately selected. In three-dimensional open flows created by superposing an axial flow onto the cross-sectional batch flow, the heat transfer rate can also be enhanced by a suitable modulation of the boundary motion. A method of analysis for these flows and a way to determine the most suitable operating conditions are given here. It is shown that in both batch and continuous processes there is an optimum frequency of the sinusoidal modulation of the boundary for which the heat transfer rate and the mixing of a passive scalar are a maximum.


Articles with similar content:

Chaotic mixing and heat transfer in time-periodic 3-D Stokes flows
International Heat Transfer Conference 12, Vol.16, 2002, issue
Antonio Jose Silveiro Rodrigo, Jose Paulo Barbosa Mota, Esteban Saatdjian
CONVECTIVE HEAT TRANSFER FROM A ROTATING DISC IN A TRANSVERSE AIR STREAM
International Heat Transfer Conference 5, Vol.3, 1974, issue
A. P. C. De Vere, G. L. Booth
DIRECT NUMERICAL SIMULATION OF OBLIQUE VORTEX SHEDDING FROM A CYLINDER IN SHEAR FLOW
TSFP DIGITAL LIBRARY ONLINE, Vol.3, 2003, issue
Eric Lamballais, Jorge Hugo Silvestrini
The Mixed Convection Flow of a Bingham Plastic in an Eccentric Annulus
International Journal of Fluid Mechanics Research, Vol.25, 1998, issue 1-3
N. Patel, Derek B. Ingham
EFFECTS OF FREESTREAM TURBULENCE ON COMBINED-CONVECTION BOUNDARY LAYER ALONG A VERTICAL HEATED PLATE
TSFP DIGITAL LIBRARY ONLINE, Vol.4, 2005, issue
Nobukazu Tanaka, Yasutaka Nagano, Toshihiro Tsuji, Yasuo Hattori