ISSN Online: 2377-424X
International Heat Transfer Conference 12
Heat Transfer Enhancement and Flow Characteristics of Drag-Reducing Surfactant Aqueous Solutions Using Turbulent Promoters
Résumé
In this paper, characteristics of fluid flow and heat transfer of a drag-reducing dilute cationic surfactant solution in a channel and a tube are investigated to realize a highly efficient thermal transportation system.I t is attainable for the reduction of the turbulent frictional drag by dilute surfactant aqueous solutions. However, many
investigations, which are of full drag-reducing flow without disturbance, have showed that the heat transfer is
reduced simultaneously.I n order to recover the reduced heat transfer, the effect of some turbulent promoters and
a row of delta winglets that generates the longitudinal vortices were tested in a two-dimensional channel.
Further, the examination on the relation on the relation between heat transport and momentum one was carried
out; it was found that the critical velocity corresponding to the critical Reynolds number at which the drag-reduction
effect reaches a maximum value only depends on the concentration of the surfactant solution.