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International Heat Transfer Conference 10

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

AN EXPERIMENTAL AND THEORETICAL STUDY OF LAMINAR FLUID FLOW AND HEAT TRANSFER IN HELICAL COILS

G. Yang
Mechanical Engineering Department, Florida International University The State University of Florida at Miami, Miami, FL 33199, USA; Department of Engineering Mechanics Tsinghua University Beijing 100084, China

M. A. Ebadian
Mechanical Engineering Department, Florida International University The State University of Florida at Miami, Miami, FL 33199, USA

Hassan M. Soliman
Department of Mechanical and Industrial Engineering, University of Manitoba, Winnipeg, Manitoba, Canada

DOI: 10.1615/IHTC10.2970
pages 321-326

Sinopsis

This paper presents the major results of the study of fluid flow and heat transfer in helical coils with substantial pitch. The fully developed axial and secondary velocities in the helical coils were measured by an LDA system and compared well with our numerical prediction. The energy equation has been solved theoretically and numerically. The results indicate that torsion can remarkably distort the symmetry of the vortices of the secondary flow and twist the contours of the axial velocity and temperature. In some cases, the torsion caused by substantial pitch may significantly reduce the heat transfer rate.

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