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Effect of stiffness on tumbling dynamics of short worm-like polymers under mixed flows

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Abstract

This study examined the effects of the stiffness on the tumbling dynamics of short semi-flexible polymers in mixed flows varying from simple shear to pure rotation, as an extension of a previous study on rod-like polymers. A multi bead-rod model with bending potential was adopted and represented the stiffness or persistence length of the polymers. The rotational time and angular distribution of the semi-flexible chains were examined in mixed flows. These results were compared with previous theoretical predictions and numerical simulations of rod-like polymers. Furthermore, the angular distribution of the short semi-flexible polymers was strongly dependent upon the stiffness of the polymers. These results are expected to be helpful in the development of lab-on-a-chip applications, such as the separation of short DNA molecules.

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Authors and Affiliations

  1. Battery R&D, LG Chem / Research Park, Daejeon, 305-380, Korea

    Joo Sung Lee

  2. Department of Chemical Engineering, Ajou University, Suwon, 443-749, Korea

    Ju Min Kim

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  1. Joo Sung Lee
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  2. Ju Min Kim
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Correspondence to Ju Min Kim.

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Lee, J.S., Kim, J.M. Effect of stiffness on tumbling dynamics of short worm-like polymers under mixed flows. Macromol. Res. 19, 273–279 (2011). https://doi.org/10.1007/s13233-011-0305-2

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  • DOI: https://doi.org/10.1007/s13233-011-0305-2

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