Bulletin of the American Physical Society
72nd Annual Meeting of the APS Division of Fluid Dynamics
Volume 64, Number 13
Saturday–Tuesday, November 23–26, 2019; Seattle, Washington
Session D01: Awards Session: Presentation of Awards and DFD Fellowships (Otto LaPorte Lecture, Stanley Corrsin Award) |
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Chair: Detlef Lohse, University of Twente: Karen Daniels, NC State University Room: 6abc |
Sunday, November 24, 2019 10:38AM - 11:08AM |
D01.00001: PRESENTATION OF AWARDS AND DFD FELLOWSHIPS |
Sunday, November 24, 2019 11:08AM - 11:53AM |
D01.00002: Otto LaPorte Lecture: Experiments in High Reynolds Number Flows Invited Speaker: Alexander Smits To attain a very large range of Reynolds numbers in the laboratory, it is convenient to use high-pressure air. We have made extensive use of this approach to study the behavior of full-developed pipe flow, turbulent boundary layers, and the wakes downstream of bodies-of-revolution. I will summarize some of the major results obtained for the pipe and boundary layer, including the scaling of the mean velocity profile, the streamwise turbulence intensity, and the spectra. I will also discuss some present and future directions of this research, which largely focus on high Reynolds number non-canonical flows. [Preview Abstract] |
Sunday, November 24, 2019 11:53AM - 12:38PM |
D01.00003: Stanley Corrsin Award Talk: From Microstructure to Models -- Fluid Mechanics of Suspensions Invited Speaker: Jeffrey F Morris Suspensions of particles in Newtonian liquids are simple complex fluids. Describable by just a handful of macroscopic variables, suspensions are in one sense simple; but the microscopic state is responsive to variation of these variables, making the flow properties non-Newtonian, and hence these are complex fluids. Our work is motivated by the scientific goal of developing a fluid mechanics of the bulk suspension behavior, toward a framework allowing analysis and computation; the hope is that this will expand understanding of suspensions found in engineering and the environment. Progress toward this goal often benefits from examination of the microscopic mechanics. Particle migration and its basis in rheological properties will be discussed, along with the microstructure of particles leading to these properties. Phenomena in extremely dense suspensions -- shear thickening and jamming -- will be discussed with an emphasis on how these motivate a shift in focus, from the particles to the force networks developed under flow. The prior Stokes-flow examples will be complemented by presentation of inertial transitions observed in Taylor-Couette flow of suspensions, to illustrate challenges faced in developing a true fluid mechanics of these mixtures. [Preview Abstract] |
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