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Weekly Seminar: Fall 2018

Speaker: Prof. Margaret Byron (Pennsylvania State University)
Title:
"Nonspherical Particles in Turbulent Flow: Influence of Shape, Size, and Density Distribution"
Hosted By: Dennice Gayme (ME)

Date: Friday, November 30, 2018
Time: 3:00 p.m.
Location: Gilman Hall 132


Abstract

The complex interactions between suspended particles and turbulent fluid flow are scale-dependent: very small particles are nearly-passive tracers, and very large particles are relatively unaffected by surrounding turbulent structures. Intermediate-size particles are situated in the midst of the range of characteristic turbulent length and time scales, and therefore experience nonlinear forcing. Furthermore, many particles of interest are nonspherical and nonuniform in composition, increasing the complexity of their interactions with the surrounding flow. Many small aquatic animals face the same spatiotemporal heterogeneity, and must navigate through a stochastic environment to meet the challenges of daily life. This talk will explore the rotational and translational kinematics of non-spherical particles of small and intermediate size which are suspended in homogeneous isotropic turbulence, as well as direct measurements of particle slip velocity and its apparent anisotropy. Further preliminary results on nonspherical particles of nonuniform mass density will also be discussed, as well as the implications of these results for living organisms which inhabit turbulent environments.

Bio

Dr. Margaret Byron is an assistant professor of Mechanical Engineering at Penn State University and the director of the Environmental and Biological Fluid Mechanics Laboratory. She studies the motion of both passive particles and aquatic organisms in turbulent flow, focusing on intermediate scales and Reynolds numbers. Her research at the nexus of biology and engineering focuses on the scale-dependent complexity of organism/environment interactions, as well as the transport of inertial particles in turbulence. Dr. Byron has a PhD from UC Berkeley in Civil and Environmental Engineering, and a B.S.E. from Princeton University in Mechanical and Aerospace Engineering.



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