This paper is intended as an overview of the current status of research on the dynamics of
dilute polymer solutions, aimed primarily at the “nonspecialist” who is interested in …

Following the observations of Toms (1948) on drag reduction by solutions of
macromolecules, a considerable amount of evidence has been accumulated on many …

The work reported below is a comparative study of the properties of turbulence with weak
mean flow in a Newtonian fluid and in a dilute polymer solution with an emphasis on the …

Among the most fascinating and important observations of polymer physics is the
remarkable influence which only a few parts per million of high molecular weight (> 106) …

By use of the recently proposed model of the dynamics of a macromolecule in transient
extensional flows, the effective viscosity increase in turbulence due to unraveling …

A hydrodynamic model for turbulence in dilute polymer solution is used to describe drag
reduction. It is shown that flexible polymers lead to an enhancement of molecular viscosity at …

A simple mechanistic picture of turbulent drag reduction is proposed, based on the recent
work of Corino and Brodkey for Newtonian fluids. Possible explanations are then considered …

This is a great occasion for me, one which I could never have foreseen or will ever forget. It
is both an honor and a pleasure to be here, and I feel that the Organizing Committee has …

P rio r to the p resent investigation, a clear picture has not been offered of the m olecular m
echanism of drag reduction which perm its laboratory m easurem ents to predict behavior in …

Although drag reduction due to the addition of small amounts of long-chain polymers has
been a well-known phenomenon for about fifty years, its mechanism is still poorly …