Conferences, Lectures, & Seminars
Events for December
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AME Seminar
Wed, Dec 01, 2010 @ 03:30 PM - 04:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Jun Zhang , Associate Professor, Department of Physics, Courant Institute of Mathematical Sciences, NYU
Talk Title: Ratchets in Fluid Transportation and in Biological Locomotion
Abstract: I discuss several cases where a broken symmetryâeither broken spontaneously or by constructionâleads to ratcheting behavior in systems where dynamic boundaries interact with moving fluids. Two examples feature reciprocal forcing combined with geometric anisotropy of boundaries. In one case a solid body can be made to hover stably, and in another, a fluid is efficiently pumped. I will also discuss the dynamics of a symmetric wing whose forward flight follows from a symmetry breaking instability, and how this dynamics is affected by the introduction of more biological realism.
Host: Dr. E. Kanso
More Info: http://ame-www.usc.edu/seminars/index.shtml#upcomingLocation: John Stauffer Science Lecture Hall (SLH) - 100
Audiences: Everyone Is Invited
Contact: April Mundy
Event Link: http://ame-www.usc.edu/seminars/index.shtml#upcoming
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AME Department Seminar
Wed, Dec 01, 2010 @ 03:30 PM - 04:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Jun Zhang, Associate Professor, Department of Physics and Courant Institute of Mathematical Sciences, New York University
Talk Title: Ratchets in Fluid Transportation and in Biological Locomotion
Abstract: I discuss several cases where a broken symmetryâeither broken spontaneously or by constructionâleads to ratcheting behavior in systems where dynamic boundaries interact with moving fluids. Two examples feature reciprocal forcing combined with geometric anisotropy of boundaries. In one case a solid body can be made to hover stably, and in another, a fluid is efficiently pumped. I will also discuss the dynamics of a symmetric wing whose forward flight follows from a symmetry breaking instability, and how this dynamics is affected by the introduction of more biological realism.
Host: Dr. E. Kanso
More Info: http://ame-www.usc.edu/seminars/index.shtml#upcomingLocation: John Stauffer Science Lecture Hall (SLH) - 100
Audiences: Everyone Is Invited
Contact: April Mundy
Event Link: http://ame-www.usc.edu/seminars/index.shtml#upcoming
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AME Department Seminar
Wed, Dec 08, 2010 @ 03:30 PM - 04:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Herman Clercx, Professor, Technische Universiteit Eindhoven
Talk Title: Turbulent Rotating Convection
Abstract: Rayleigh-Bénard convection is a classical problem in which a fluid layer enclosed between two parallel horizontal walls is heated from below and cooled at the top. In a rotating frame of reference the dynamics can change considerably through the fundamental involvement of a combination of buoyancy and Coriolis forces. The rotating Rayleigh-Bénard (RRB) setting is important for many applications, e.g., in engineering and climate modeling.
Direct numerical simulation (DNS) is used to calculate the heat transfer, flow structuring and small-scale turbulent properties at systematically varied rotation rates. The DNS code solves the incompressible Navier-Stokes equations in a cylinder in a rotating frame of reference, coupled to the heat equation within the Boussinesq approximation. The results from the DNS will be compared to data from SPIV measurements in a water-filled cylindrical convection cell.
In particular, the fate of the Large Scale Circulation, present in non-rotating RB convection, and enhanced heat transfer under influence of increasing rotation rate will be discussed in this talk.
Host: Dr. G. Spedding
More Info: http://ame-www.usc.edu/seminars/index.shtml#upcomingLocation: Robert Glen Rapp Engineering Research Building (RRB) - 208
Audiences: Everyone Is Invited
Contact: April Mundy
Event Link: http://ame-www.usc.edu/seminars/index.shtml#upcoming