ISSN Online: 2377-424X
ISBN Print: 1-56032-797-9
International Heat Transfer Conference 11
LAMINAR-TURBULENT TRANSITION OF FLOW IN A HEATED HORIZONTAL TUBE
要約
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.