Events for 08/20/2014 from all calendars

Groups and Dynamics Seminar

Time: 3:00PM - 4:00PM

Location: BLOC 624

Speaker: Dmytro Savchuk, University of South Florida

Title: Orbit automata as a new tool to attack finiteness problem for automaton groups

Abstract: We introduce a new tool, called the orbit automaton, that describes the action of an automaton group G on the subtrees corresponding to the orbits of G on levels of the tree. In particular, we provide the connection between G and the group generated by the orbit automaton and use it to deduce infiniteness of some automaton groups for which other methods did not work. This is a joint work with Ines Klimann and Matthieu Picantin.

Numerical Analysis Seminar

Time: 3:00PM - 4:00PM

Location: BLOC 628

Speaker: Ville Vuorinen , Aalto University School of Engineering, Finland

Title: Large-Eddy Simulation with OpenFOAM: Practice, Applications and Future Challenges

Abstract: In my presentation, I summarize experiences gained at the Aalto University, Finland on the application and development of the open source CFD code OpenFOAM. The focus of our research is to tackle various subproblems of the turbulent combustion and mixing phenomena occuring in internal combustion engines. First, I cover the practical side of code implementation and high level programming in OpenFOAM. Second, I provide an overview of our recent progress in the simulation of highly compressible flow, moving mesh for in-cylinder flow, and combustion. Last, I will outline a new numerical strategy for LES called Scale-Selective Discretization (SSD). SSD approach reduces the diffusive truncation error of any existing space scheme from order 2n+1 to to 2n+3 (n=0,1,2,...) enabling so called implicit LES.