Berkeley Fluids Seminar

University of California, Berkeley

Bring your lunch(have room for some seminar snacks) and enjoy learning about fluids!

Information

What: Fluids

When: TBD, 12 noon

Where: 3110, Etcheverry Hall

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Contact

Eric Ibarra

aquamanbell AT berkeley.edu


Haris Sheikh

harissheikh AT berkeley.edu


Kinematics of non-spherical particles suspended in turbulence at inertial and dissipation scales

Monday, March 11, 2019

12:00-13:00, 3110 Etcheverry Hall

Prof. Evan Variano

(Civil and Environmental Engineering)



Abstract: Natural particles suspended in water are often non-spherical. We explore the ways in which particle size and shape affect particle motion in homogeneous isotropic turbulent flow. Laboratory measurements and numerical simulations are used to explore the kinematics of particles. Particle shapes are idealized and motivated by open questions in environmental engineering, notably regarding plankton, sediment aggregates, and autonomous vehicles. The results provide the basis for stochastic modeling of particles in aquatic environments, as well as some new perspectives from which to view turbulence. One highlight from the results is that shape has only a very weak effect on particle angular velocity calculated with respect the global reference frame (i.e. east/north/up) and a significant effect in a particle's local frame. The explanation for this effect is different for small and large particles.



This work is done with support from with support from Palak Thakur (BS), Theresa Oehmke (MS), Ankur Bordoloi (PhD), and Nimish Pujara (Professor, UW Madison).



Bio: Dr. Evan Variano is an Associate Professor in Civil & Environmental Engineering. In 2018, he received the UC Berkeley Postdoctoral Mentor award, and he is also a UC Berkeley Presidential Chair Fellow and Hellman Faculty Fellow. Before joining UC Berkeley as faculty in 2008, he studied at Columbia, Cornell, and Princeton Universities. His work addresses environmental fluid dynamics, focusing on mass transport, plankton, and wetlands.





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Acknowledgments

Prof. Eliot Quataert on behalf of The Theoretical Astrophysics Center and the Astronomy Department (UC Berkeley)

Prof. Philip S. Marcus on behalf of the Mechanical Engineering Department (UC Berkeley)

Prof. Michael Manga (Earth and Planetary Science, UC Berkeley)

Prof. Evan Variano (Civil and Environmental Engineering, UC Berkeley)


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