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ISSN Online: 2377-424X

ISBN Print: 1-56032-797-9

International Heat Transfer Conference 11
August, 23-28, 1998, Kyongju, Korea

LAMINAR-TURBULENT TRANSITION OF FLOW IN A HEATED HORIZONTAL TUBE

Get access (open in a dialog) DOI: 10.1615/IHTC11.3280
pages 341-346

Abstract

We have experimentally studied the influence of buoyancy force and inlet flow conditions on the laminar-turbulent transition process of fully-developed air flow in a heated horizontal tube with uniform wall heat flux. Eight time-series of the air temperature were simultaneously obtained using eight thermocouples positioned within the tube along a vertical line passing through the tube axis. We have determined the nature of the transition behavior in space and time by analyzing these instantaneous time-series. By calculating a set of Lyapunov exponents from the time-series of a single thermocouple, these transitional flows are found to be chaotic.