Oscillation-Controlled Heat Transport Tube.(Effects of Transition to Turbulent Oscillatory Flow on Heat Transport Characteristics).

Shin, Hung-Tae; Nishio, S.; Oh, S. H.; Uemura, Mikiko

doi:10.1299/kikaib.64.890

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2007

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“…Numerous studies were conducted to investigate axial heat transport inside smooth tubes induced by reciprocating flow of incompressible fluids [for example, [1][2][3][4][5][6][7][8][9]. The so-called "dream pipe" is a typical example where heat transport in the axial direction was induced by the interaction between (1) the radial conduction due to phase difference between the reciprocating flows in the tube core region and the boundary layer near the tube wall and (2) the advection in axial direction due to the reciprocating flow in the tube central core region.…”

Section: Introductionmentioning

confidence: 99%

Axial Heat Transport Mechanism due to Reciprocating Flow in a Ribbed Tube

Mochizuki

Murata

Saitô

2007

JTST

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Experiments and numerical simulation are performed to investigate the mechanism of heat and mass transport inside a ribbed tube induced by reciprocating flow. The reciprocating flow is generated by a crank-piston device without producing a net throughflow. It is disclosed from the study that the reciprocating flow causes the generation and extinction of separation vortices behind each rib to manipulate "trap and release" mechanism of heat and mass transport in the axial direction. The transport performance thus produced inside the ribbed tube is far superior to those inside the smooth tubes or so-called dream pipes.

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