Experimental Study of a Thermal Plume Evolving in a Vertical Heated Canal: Influence of the Temperature of the Plume Source

Gammoudi, Adel; Zinoubi, Jamil; Maad, Rejeb Ben
March 2010
International Review of Mechanical Engineering;Mar2010, Vol. 4 Issue 3, p288
Academic Journal
The influence of the plume source temperature in the structure of a thermal plume evolving in a heated vertical canal has been studied. For that an experimental apparatus comprising a rectangular source was placed at the entrance of a vertical canal of a rectangular section open at both ends on quiet environment of uniform temperature. The thermal plume generated by a heated source is added to a thermosiphon flow that develops at the walls of the canal. A visualization by laser plane has shown that the system was fed from the bottom through by three fresh air nets, the existence of a hot envelope just above the source and also three different zones of flow as has been noted in previous work on cylindrical geometry. The study of the thermal and dynamics fields, performed by hot wire and constant current anemometry, has shown that, contrary to previous work, the blocking of the lateral extension of the plume to the sides of the canal is not observed, the existence of three areas already observed by flow visualization for all the temperatures of the source studied. Moreover, the increase of the temperature of the source allows a larger lateral transport, improves flow rate of the flow and intensifies heat transfer.


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