Turbulent drag reduction characteristics induced by calf-thymus DNA

S.T. Lim, S.J. Park, C.K. Chan and H.J. Choi

Physica A: Statistical Mechanics and its Applications, 2005, vol. 350, issue 1, 84-88

Abstract: We report novel turbulent drag reduction (DR) behaviors of polydisperse calf-thymus DNA (CT-DNA) as a potential drag reducing candidate, by injecting appropriately prepared concentrated stock solution of the CT-DNA into a buffer solution in a rotating disk apparatus. By putting emphasis on the effect of DNA concentration, its DR characteristics were compared with that of λ-DNA possessing monodisperse molecular weight characteristics based on both DR efficiency and a mechanical degradation under turbulence. The DNA chains having much higher molecular size than that of λ-DNA are observed to be more susceptible to mechanical degradation in a turbulent flow. This result was verified via electrophoresis.

Keywords: DNA; Turbulent drag reduction; Mechanical degradation; Polymer (search for similar items in EconPapers)
Date: 2005
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:350:y:2005:i:1:p:84-88

DOI: 10.1016/j.physa.2004.11.034

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