Universal scaling for polymer degradation in turbulent flows

Siva A. Vanapalli, Michael J. Solomon

Research output: Contribution to conferencePaperpeer-review

Abstract

Flow-induced polymer chain scission (or degradation) is a ubiquitous phenomenon that involves breaking of covalent bonds at the atomic scale due to the stress generated by fluid flow at the continuum scale. This phenomenon has implications in turbulent drag reduction, polymer filtration and shotgun genome sequencing. Fundamental understanding of the relationship among flow strength, scission and the resulting molar mass of a polymer chain is vital to the design of these applications. Our flow characterization experiments in cross-slot and contraction geometries demonstrate that previous scission scaling experiments that were thought to be in the laminar regime were in fact affected by turbulence. We reconcile inconsistencies in these scission experiments and prior theories by means of the hypothesis that polymer scission in turbulence is driven by the Kolmogorov cascade. We thereby establish a universal scaling for polymer chain scission in turbulence that is well supported by available experimental data. We further use the scission scaling to obtain scission-induced bounds on maximum drag reduction.

Original languageEnglish
Pages529
Number of pages1
StatePublished - 2005
Event05AIChE: 2005 AIChE Annual Meeting and Fall Showcase - Cincinnati, OH, United States
Duration: Oct 30 2005Nov 4 2005

Conference

Conference05AIChE: 2005 AIChE Annual Meeting and Fall Showcase
CountryUnited States
CityCincinnati, OH
Period10/30/0511/4/05

Fingerprint Dive into the research topics of 'Universal scaling for polymer degradation in turbulent flows'. Together they form a unique fingerprint.

Cite this