Phys. Rev. E 77, 046309 (2008) [5 pages]Comparison of theory and direct numerical simulations of drag reduction by rodlike polymers in turbulent channel flowsReceived 10 June 2007; published 22 April 2008 Numerical simulations of turbulent channel flows, with or without additives, are limited in the extent of the Reynolds number (Re) and Deborah number (De). The comparison of such simulations to theories of drag reduction, which are usually derived for asymptotically high Re and De, calls for some care. In this paper we present a study of drag reduction by rodlike polymers in a turbulent channel flow using direct numerical simulation and illustrate how these numerical results should be related to the recently developed theory. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevE.77.046309
DOI:
10.1103/PhysRevE.77.046309
PACS:
47.27.Rc
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