Authors: Angnes Ngieng Tze Tiong Perumal Kumar Agus Saptoro
Publish Date: 2015/07/09
Volume: 32, Issue: 8, Pages: 1455-1476
Abstract
Polymers are effective drag reducers owing to their ability to suppress the formation of turbulent eddies at low concentrations Existing drag reduction methods can be generally classified into additive and nonadditive techniques The polymer additive based method is categorized under additive techniques Other drag reducing additives are fibers and surfactants Nonadditive techniques are associated with the applications of different types of surfaces riblets dimples oscillating walls compliant surfaces and microbubbles This review focuses on experimental and computational fluid dynamics CFD modeling studies on polymerinduced drag reduction in turbulent regimes Other drag reduction methods are briefly addressed and compared to polymerinduced drag reduction This paper also reports on the effects of polymer additives on the heat transfer performances in laminar regime Knowledge gaps and potential research areas are identified It is envisaged that polymer additives may be a promising solution in addressing the current limitations of nanofluid heat transfer applications
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