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Study of buoyant jets in natural ventilation of a model room

Subudhi, Sudhakar and Sreenivas, KR and Arakeri, Jaywant H (2013) Study of buoyant jets in natural ventilation of a model room. In: International Journal of Heat and Mass Transfer, 64 . pp. 91-97.

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Official URL: http://dx.doi.org/ 10.1016/j.ijheatmasstransfer.20...


Buoyant jets in natural ventilation of a model room with water as the fluid medium have been studied. A constant heat flux has been maintained on the bottom surface of the room. The buoyancy causes flow to enter through the bottom opening and leave through the top opening. The shadowgraph technique is used for visualization. At the inlet, a negatively buoyant jet is observed, whereas a positively buoyant jet is observed at the outlet. The theoretical results for the centerline trajectories of these buoyant jets using both Gaussian and top-hat profiles are discussed considering the variation of the entrainment coefficient with the local Froude number and the variation of the spreading ratio of buoyancy to velocity profile with the distance from the source. The shape of the profiles is found to evolve from top-hat to Gaussian geometry.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Natural Ventilation; Positively Buoyant Jet; Negatively Buoyant Jet; Gaussian Profile; Top-Hat Profile
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Depositing User: Francis Jayakanth
Date Deposited: 23 Sep 2013 09:53
Last Modified: 23 Sep 2013 09:53
URI: http://eprints.iisc.ac.in/id/eprint/47389

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