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University of Wyoming

UW Mathematics Department Graduate Student Seminar

 

 
Nov 30 Arunasalam Rahunanthan  
 

Abstract:The engineering design of eddy current actuated systems is expensive because of the rapid changes in field quantities and the resulting need to model very accurately. As a result, many suggestions have been made to avoid computations in eddy current regions. The best known of these is the impedance boundary condition at steel interfaces. However, the impedance boundary condition does not work for nonlinear steel because the phasor analysis on which the impedance boundary condition is based is not applicable. MacLean’s model is best suited for analyzing in the nonlinear region. Reported problems with time-stepping are overcome by studying various time stepping methods and identifying a suitable numerical scheme. The identified method is shown to be convergent by using von Neumann Stability test.
In my talk I'll be mainly focusing on von Neumann stability test.


Nov 15 Michael Stöllinger Modeling turbulent reactive flows
 

Abstract:I will present the governing equations (Navier Stokes + species conservation) and talk about the averaging process to obtain the RANS equations. I will also speak about the problems of averaging the reaction source term and how stochastic models can be used to close this term.


Nov 1 Silvia Popa Experience as an Actuary
 

Abstract: During the Spring semester, I had an internship with an insurance
company in Koblenz, Germany. When I left Laramie, I did not have any
idea about their expectations or about the topic I was going to work on.
It ended up being a very rewarding experience for me and I would like to
share it with you on Wednesday at our usual meeting. Some math concepts
involved: time series, stochastic processes, weak convergence,
volatility, etc.