Stretching of polymers in a turbulent environment

by: Bruno Eckhardt, Jochen Kronjager, Jorg Schumacher

Computer Physics Communications, Vol. 147, No. 1-2. (1 August 2002), pp. 538-543.

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Abstract

The interaction of polymers with small-scale velocity gradients can trigger a coil-stretch transition in the polymers. We analyze this transition within a direct numerical simulation of shear turbulence with an Oldroyd-B model for the polymer. In the coiled state the lengths of polymers are distributed algebraically with an exponent 2[gamma]-1/De, where [gamma] is a characteristic stretching rate of the flow and De the Deborah number. In the stretched state we demonstrate that the length distribution of the polymers is limited by the feedback to the flow.

@article{citeulike:2272650, abstract = {The interaction of polymers with small-scale velocity gradients can trigger a coil-stretch transition in the polymers. We analyze this transition within a direct numerical simulation of shear turbulence with an Oldroyd-B model for the polymer. In the coiled state the lengths of polymers are distributed algebraically with an exponent 2[gamma]-1/De, where [gamma] is a characteristic stretching rate of the flow and De the Deborah number. In the stretched state we demonstrate that the length distribution of the polymers is limited by the feedback to the flow.}, author = {Eckhardt, Bruno and Kronjager, Jochen and Schumacher, Jorg }, citeulike-article-id = {2272650}, doi = {10.1016/S0010-4655(02)00339-9}, journal = {Computer Physics Communications}, keywords = {polymer, profile, shear}, month = {August}, number = {1-2}, pages = {538--543}, posted-at = {2008-01-22 09:21:23}, priority = {2}, title = {Stretching of polymers in a turbulent environment}, url = {http://dx.doi.org/10.1016/S0010-4655(02)00339-9}, volume = {147}, year = {2002} }

RIS record

TY - JOUR ID - citeulike:2272650 L3 - citeulike-article-id:2272650 TI - Stretching of polymers in a turbulent environment JF - Computer Physics Communications VL - 147 IS - 1-2 SP - 538 EP - 543 N2 - The interaction of polymers with small-scale velocity gradients can trigger a coil-stretch transition in the polymers. We analyze this transition within a direct numerical simulation of shear turbulence with an Oldroyd-B model for the polymer. In the coiled state the lengths of polymers are distributed algebraically with an exponent 2[gamma]-1/De, where [gamma] is a characteristic stretching rate of the flow and De the Deborah number. In the stretched state we demonstrate that the length distribution of the polymers is limited by the feedback to the flow. KW - polymer KW - profile KW - shear AU - Eckhardt, Bruno AU - Kronjager, Jochen AU - Schumacher, Jorg PY - 2002/08/01/ UR - http://dx.doi.org/10.1016/S0010-4655(02)00339-9 ER -

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