IPST Seminar

Date
Tue, Sep 8, 2015 1:15 pm - 2:15 pm
Location
IPST Building Room 1116

Description

Title : Turbulence, Noise, and Predictability: Basic Issues for High-Speed Reactive Flows
Speaker Name: Elaina Oran
Speaker Institution : UMCP
Abstract : From a science and engineering point of view, we need to be able to compute the properties of fluid systems with large energy inputs and on scales ranging from of nanometers to megaparsecs. This capability is needed for designing engines for high-speed flow (e.g., development of detonation-wave engines), ensuring safety in coal mines (e.g., from natural-gas explosions), and understanding the universe (e.g., determining the physical consequences of supernova explosions in the early and later universe). All of these systems may be described by some form of the of the time-dependent compressible Navier-Stokes equations, but with very differing initial and boundary conditions, to say nothing of the vastly differing energy source terms. In all of these applications, turbulence is a fundamental issue and a controlling element in the system evolution or performance. Inherent in this are questions of intermittency, noise, and predictability. What does this mean in practical terms, where does it come from, and what it behavior implies for very high speed flows or very large system? We will try to describe some of the difficult and confusing issues on which these questions are based.
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