VDI-Buch

G3 Heat Transfer in Helically Coiled Tubes

Abstract

Centrifugal forces in a fluid flowing through a curved pipe cause secondary flows circulating outward into the core region of the pipe to form a pair of symmetric vortices. The combination of both the main and the secondary flows creates a flow pattern in which the maximum velocity is shifted outward from the center of the tube. The secondary flow produces a transverse transport of the fluid over the cross section of the pipe. This additional convective transport improves heat transfer between the fluid and the wall of the pipe but increases the pressure drop when compared to that in a straight tube. The differences are particularly apparent in laminar flows.

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Title
G3 Heat Transfer in Helically Coiled Tubes
Book Title
VDI Heat Atlas
Book DOI
10.1007/978-3-540-77877-6
Chapter DOI
10.1007/978-3-540-77877-6_36
Part of
VDI-Buch
Volume
Editors
Authors
  • Volker Gnielinski Send Email (1_36)
  • Author Affiliation
  • 1_36 Karlsruher Institut für Technologie (KIT), Karlsruhe, Germany
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