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USACM CFD/FSI Virtual Seminar
Tuesday, April 19, 2022, 3:00 PM - 4:00 PM CST
Category: Events

USACM CFD/FSI Virtual Seminar

The Shifted Boundary Method for CFD

Prof. Guglielmo Scovazzi

Environmental Engineering and Mechanical Engineering & Materials Science
Duke University

Abstract

Embedded/immersed/unfitted boundary methods obviate the need for continual re-meshing in many applications involving rapid prototyping and design with complex geometries. Unfortunately, many finite element embedded boundary methods are also difficult to implement due to the need to perform complex cell cutting operations at boundaries, and the consequences that these operations may have on the overall conditioning of the ensuing algebraic problems. We present a new, stable, and simple embedded boundary method, named “Shifted Boundary Method” (SBM), which eliminates the need to perform cell cutting. Boundary conditions are imposed on a surrogate discrete boundary, lying on the interior of the true boundary interface. We then construct appropriate field extension operators by way of Taylor expansions, with the purpose of preserving accuracy when imposing the boundary conditions. We demonstrate the SBM on large-scale porous media flow problems; incompressible flow problems governed by the Navier-Stokes equations (also including moving free surfaces); and problems governed by hyperbolic conservation laws.

Biography

Guglielmo Scovazzi is Professor of Civil & Environmental Engineering and Mechanical Engineering & Materials Science at Duke University. His interests are in the general area of computational mechanics, and specifically in CFD, computational solid mechanics, fluid/structure interaction, computational geomechanics, flow through porous media. He earned B.S./M.S. Degrees in Aerospace Engineering at Politecnico di Torino in 1998. He received a M.S. in 2001 and a Ph.D. in 2004, both from the Mechanical Engineering Department at Stanford University. Between 2004 and 2012, he held a position as Senior Member of the Technical Staff at Sandia National Laboratories, Albuquerque (New Mexico). Guglielmo Scovazzi is a recipient of the 2014 Early Career Award from the Office of Science of the US Department of Energy (ASCR program), and the 2017 Presidential Early Career Award for Scientists and Engineers (PECASE). In February 2018, he was named Kavli Fellow by the National Academy of Sciences and the Kavli Foundation. The Kavli Fellowship acknowledges contributions of U.S. scientists under the age of 45. He was also named Distinguished Adjunct Professor at POSTECH (Pohang University of Science and Technology, South Korea). He is an associate editor of the Journal of Computational Physics and in the editorial board of "Computer Methods in Applied Mechanics and Engineering” journal, the "International Journal on Numerical Methods for Fluids," and the "Engineering with Computers" journal. He is a member of the executive board of the US Association for Computational Mechanics and a member of IACM, SIAM and ASME.

 

Sponsored by USACM Technical Thrust Area on Computational Fluid Dynamics/Fluid Structure Interaction.
Contact for information about the seminar: [email protected]

 

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