Maximum drag reduction simulation using rodlike polymers

Maximum drag reduction simulation using rodlike polymers.

Simulations of maximum drag reduction (MDR) in channel flow using constitutive equations for suspensions of noninteracting rods predict a few-fold larger turbulent kinetic energy than in experiments using rodlike polymers. These differences are attributed to the neglect of interactions between polymers in the simulations. Despite these inconsistencies the simulations correctly reproduce the ess...

On the maximum drag reduction due to added polymers in Poiseuille flow

JAMES D. WOODCOCK, JOHN E. SADER and IVAN MARUSIC Journal of Fluid Mechanics / Volume 659 / September 2010, pp 473 ­ 483 DOI: 10.1017/S0022112010003083, Published online: 27 July 2010 Link to this article: http://journals.cambridge.org/abstract_S0022112010003083 How to cite this article: JAMES D. WOODCOCK, JOHN E. SADER and IVAN MARUSIC (2010). On the maximum drag reduction due to added polymer...

Superposition of drag reduction due to riblets on drag reduction due to polymers

Drag reduction by polymers in wall bounded turbulence.

We elucidate the mechanism of drag reduction by polymers in turbulent wall-bounded flows: while momentum is produced at a fixed rate by the forcing, polymer stretching results in the suppression of momentum flux to the wall. On the basis of the equations of fluid mechanics we develop the phenomenology of the "maximum drag reduction asymptote" which is the maximum drag reduction attained by poly...

Controlled assembly of rodlike viruses with polymers.

A practical method to assemble rodlike tobacco mosaic virus and bateriophage M13 with polymers was developed, which afforded a 3D core-shell composite with morphological control.