Phys. Rev. Lett. 92, 078302 (2004) [4 pages]Theory of Concentration Dependence in Drag Reduction by Polymers and of the Maximum Drag Reduction AsymptoteReceived 1 May 2003; published 20 February 2004 A simple model of the effect of polymer concentration on the amount of drag reduction in turbulence is presented, simulated, and analyzed. The qualitative phase diagram of drag coefficient versus Reynolds number (Re) is recaptured in this model, including the theoretically elusive onset of drag reduction and the maximum drag reduction (MDR) asymptote. The Re-dependent drag and the MDR are analytically explained, and the dependence of the amount of drag on material parameters is rationalized. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.078302
DOI:
10.1103/PhysRevLett.92.078302
PACS:
83.60.Yz, 47.50.+d, 83.80.Rs
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.