Nov 20, 2012: Simulating dispersion: around corals, inside the lungs, over cities, Gianluca Iaccarino

 

Date: Thu, 20 December 2012

Time: 03.15 p.m. - 04.30 p.m

Location: HG F 33.1

 

Gianluca Iaccarino
Institute for Computational Mathematical Engineering

Stanford University

 

Dispersion and transport of passive agents are critical phenomena in a number of physical processes. In this talk we illustrate numerical simulations of nutrient transport around coral reefs, of bio-agent release in urban environments and of aerosol drug delivery inside the human airways. The difficulties of performing accurate computations are amplified by the presence of extremely complex geometries, the inherent turbulent flow dynamics and the desire of obtaining results in nearly real-time. We have developed a flexible mesh generation techniques and realistic physics models to address these problems. Specifically, we model the turbulent flow using Reynolds-averaged Navier-Stokes model combined with novel, sophisticated algebraic scalar flux
closures capable of capturing strong anisotropy and counter-gradient diffusion. Finally, we consider the effect of variability either in the specification of the geometrical configurations or in the operating scenarios to capture the unavoidable uncertainties associated with these problems.

 

PDF can be found here.