HYDRODYNAMIC ASPECTS OF THE TOMS EFFECT

The physicomathematical model of migration of polymers in a liquid turbulent fl ow in a pipe is based on a comparison of forces transverse to the motion of the mainstream fl ow: the Saffman, Magnus, and turbophoresis forces. It has been shown that the polymer particles are grouped near a certain boundary within the limits of the boundary layer. On this basis, the authors have made assumptions on the mechanism of suppression of turbulent pulsations and decrease in the viscous friction near the wall, which makes up the Toms effect. The proposed model satisfi es, at least, qualitatively, various actually observed manifestations of the effect.
   
Author:  S. A. Strel′nikova, G. V. Tkachenko, and B. A. Uryukov
Keywords:  turbulent flow in pipelines, polymer additives, Toms effect, Magnus effect, Saffman force
Page:  1491