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ISSN Online: 2377-424X

International Heat Transfer Conference 12
August, 18-23, 2002, Grenoble, France

Shadowgraphic observation of surface waves on a water film falling inside a vertical tube and the associated gas absorption

Get access (open in a dialog) DOI: 10.1615/IHTC12.480
6 pages

Résumé

The dynamics and the associated gas absorption rates of naturally evolving and periodically triggered surface waves on water film falling inside a vertical tube have experimentally been investigated. It was found that the transition from laminar to turbulent flow occurs within Reynolds number range of 400 ∈ Re ∈ 700, along with a drastic increase in the Sherwood number Sh. Furthermore, a new transition was found to occur at Re ~ 40 in the laminar flow region, where the dynamics of waves significantly changes and a sudden decrease in the power n of the correlation Sh = CRen is observed.