Flow-induced rotation and inertial focusing of complex shaped particles in channel flow

ORAL

Abstract

Inertial focusing of particles in a spatially varying shear flow is potentially an effective technique for the manipulation and segregation of microparticles. While the inertial migration of spherical/circular particles has been studied theoretically, experimentally, and numerically in many previous studies, little attention has been paid to the behavior of particles with complex, asymmetric shapes. Given that most real particles have non-simple shapes, the effect of particle shape on their inertial movement in flow is particularly important to investigate. In the present study, the inertial focusing and rotation characteristics of a class of complex-shaped particles in channel flow are investigated by using a sharp-interface immersed boundary method. The effects of particle shape, size, and flow Reynolds number on particle focusing and rotation are examined. Based on the simulations, we present physical insights and scaling laws for this phenomenon.

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Presenters

  • Rajat Mittal

    Johns Hopkins Univ, Department of Mechanical Engineering, Johns Hopkins University, Johns Hopkins University

Authors

  • Rajat Mittal

    Johns Hopkins Univ, Department of Mechanical Engineering, Johns Hopkins University, Johns Hopkins University

  • Jung-Hee Seo

    Johns Hopkins University, Johns Hopkins University, Johns Hopkins University

  • Soojung Claire Claire Hur

    Johns Hopkins Univ, Department of Mechanical Engineering, Johns Hopkins University