A DCAMM seminar will be presented by
Associate Professor Dan Negrut,
Department of Mechanical Engineering,
University of Wisconsin-Madison
Abstract:
This talk concentrates on two issues: (a) a comparison of two alternatives for handling frictional contact in studying the dynamics of large particulate systems; and (b) a brief presentation of a software engine called Chrono that can be used to investigate the dynamics of particu-late systems. For (a), a penalty approach, which is called DEM-P and relies on the local deformation at the point of contact, will be com-pared with a complementarity approach called DEM-C and which relies on a differential variational inclusion to pose the frictional contact model. The two methods will be contrasted in terms of computational effort required to produce an acceptable solution, ease of implemen-tation, and expressivity; i.e. prowess in relation to capturing physics of interest. In relation to (b) the presentation will outline the structure of Chrono, its leverage of parallel computing, and showcase its use in a broad spectrum of problems – from additive manufacturing to ground vehicle mobility on deformable soils. Chrono, which is an open source software released under a permissive BSD3 license, can be used for analyzing the dynamics of particulate systems that can be dry or assume the form of suspensions. For the latter, Chrono handles the fluid-solid interaction problem by solving the Navier-Stokes equations using a smoothed particle hydrodynamics (SPH) methodology.
Danish pastry, coffee and tea will be served 15 minutes before the seminar starts.
All interested persons are invited