סמינר מחלקתי - המחלקה להנדסה ביו רפואית

Pathological and medical device hemodynamics often involve unsteady, irregular, transitional and even turbulent flow through complex curved, 

branched vessels in the presence of moving or rotating geometries.  Most commercial and open-source computational fluid dynamics (CFD) codes model these flows using engineering turbulence models, low-order numerical methods, and handle complex geometries using unstructured body-fitted grids. Rotating components are often handled using different sliding mesh or multiple reference frame approaches that many times are not efficient or accurate. We present details and sample results from an in-house CFD code called WenoHemo that employs high-order numerical methods to solve the incompressible Navier-Stokes equations on structured Cartesian grids.  Turbulence is accounted for using the large eddy simulation (LES) technique and complex/rotating geometries are treated using a novel multiblock immersed boundary method.  Applications include aneurysms, stenoses, congenital heart disease, mechanical heart valves, and blood pumps.  Current and future directions are also featured in the talk.

Brief Biography

Prof. Steven (Chaim) Frankel received all of his degrees in aerospace engineering with his BS from State University of New York at Buffalo in 1988, his MS from North Carolina State University in 1990, and his PhD from State University of New York at Buffalo in 1993.  Spent the next 20 years as a Professor in the School of Mechanical Engineering at Purdue University in West Lafayette, Indiana where his work has focused on high-fidelity computational fluid dynamics with applications in turbulence, combustion, aeroacoustic, multiphase, and biological flows.  In June 2013, he made aliyah with his wife and four children, joining the Faculty of Mechanical Engineering at the Technion.  He commutes by train and bus several days a week to Technion from his home in Ramat Bet Shemesh.