Transient Development Of Laminar Mixed
Convection Flow In A Vertical Tube
Author(s)
C.T. Nguyen, S.E.B. Maïga, T. Maré & N. Galanis
Abstract
The problem of the transient laminar mixed convection flow in a vertical tube
subject to time-dependent inlet boundary conditions has been numerically
investigated. Results have clearly shown that successive step changes of the fluid
inlet temperature have tremendous effects on the flow structure and its transient
behaviors. It has been observed that a multiple-cell structure may co-exist in the
tube. Thus, as hot fluid is cooled by heat loss to ambient environment, a first
recirculation cell is noticed on the tube wall; it continues to increase both in
volume and intensity. Shortly after the beginning of the positive step change of
fluid inlet temperature, a second recirculatio
Keywords
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