HessamHessam Babaee (MIT) "Effect of Bifurcation in Dynamical Systems on Uncertainty Quantification of Jet in Crossflow"
Thursday, November 14, 2013, 4:00pm to 5:00pm | Room 5-234

In this study the effect of uncertainty of velocity ratio on jet in crossflow and particularly film cooling performance in gas turbines is studied. Direct numerical simulations using spectral/hp element have been combined with a stochastic collocation approach where the parametric space is discretized using Multi-Element general Polynomial Chaos (ME-gPC) method. Velocity ratio serves as a bifurcation parameter in a jet in a crossflow and the dynamical system is shown to have several bifurcations. As a result of the bifurcations, the target functional is observed to have low-regularity with respect to the parametric space. Due to the low-regularity of the response surface, ME-gPC is observed to be a computationally effective strategy to study the effect of uncertainty in a jet in a crossflow when velocity ratio is the random parameter.

Short Bio: Hessam Babaee obtained B.Sc. and M.Sc. degrees in Mechanical Engineering both from University of Tehran. He earned the PhD degree in Mechanical Engineering and M.Sc. in Applied Mathematics at Louisiana State University which both were awarded in August 2013. He is currently a postdoc associate at MIT Seagrant College Program. His area of research is developing numerical methods for studying stochastic heat transfer problems.