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A "jet in cross-flow" is a jet of fluid that exits an orifice to interact with the surrounding fluid that is flowing "across" the orifice. The term "high-speed jets in crossflow" implies that either the jet or the crossflow is supersonic. These are very complex flows, as shown in the image above. Professor Krishnan Mahesh (MSI Fellow) and his student Xiaochuan Chai in the Department of Aerospace Engineering and Mechanics are developing novel numerical methodologies to perform high-fidelity simulations of high-speed jets in crossflow. An article about their research appears in the Summer 2011 issue of the MSI Research Bulletin.
Membrane proteins play vital roles in many cellular processes such as cell fusion, signal transduction, ion translocation, and homeostasis, among others.To link structure to function, it is necessary to understand membrane protein dynamics within their native environment.The research group of Professor Gianluigi Veglia (BMBB) uses MSI resources to develop new computational approaches to model membrane protein structures and to study their dynamics in explicit lipid membranes. This image shows an NMR structure of membrane protein phospholamban (30kDa) in lipid bilayer.
For 21 years, MSI has hosted an Undergraduate Internship Program (UIP) that provides opportunities for students to learn about supercomputing and scientific research. The 2011 MSI UIP began in June and will continue until mid-August. Nine undergraduates from around the country are working with MSI Principal Investigators on projects in a number of fields using high-performance computing environments, especially visualization and computer graphics. Interns prepare a report and give a presentation about their work. This photo was taken at the weekly lunch seminar on June 28, hosted by Assistant Professor Ryan Elliott (Aerospace Engineering and Mechanics. More information can be found on the UIP web page.
The research group of Professor Sean Garrick (MSI Fellow) at the Computational Transport Phenomena Laboratory in the Department of Mechanical Engineering uses MSI resources to model and simulate turbulent reacting flows. Jun Liu, a graduate student in the Garrick group, was a finalist in the poster competition at the recent MSI Research Exhibition. An article about his poster, which described direct numerical simulations of homogeneous metal vapor nucleation in practical flows, is planned for the Summer 2011 issue of the MSI Research Bulletin, which will be published in August 2011. The image above is taken from the poster. Pictures of all the Research Exhibition finalists can be found on the event webpage.
Fluid motion is classified as either laminar or turbulent. Flows that are smooth and ordered (laminar) may become complex and disordered (turbulent) as the flow speed increases, a process called transition to turbulence. Turbulent flow around cars, airplanes, and ships increases drag, which, in turn, forces vehicles to use more fuel and reduces the efficiency of wind-turbine blades. Assistant Professor Mihailo Jovanovic (Electrical and Computer Engineering) and his research group are developing theories and techniques for sensor-less flow control to prevent the transition to turbulence. An article about this work appears in the Spring 2011 MSI Research Bulletin. The image above shows how laminar flow around an aircraft wing or wind-turbine blade becomes complex and disordered as it moves away from the leading edge (e-fluids photo at bottom left by Miguel Visbal).