Surya Vanka

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The heat generation and fluid convection induced by plasmonic nanostructures is attractive for optofluidic applications. However, previously published theoretical studies predict only nanometre per second fluid velocities that are inadequate for microscale mass transport. Here we show both theoretically and experimentally that an array of plasmonic(More)
Starting in 1996, the authors, Surya Vanka and Jim Budd developed ID-Online, an Asynchronous Learning Network (ALN) for Industrial Design Education at the University of Illinois at Urbana-Champaign. The primary objective of ID-Online was to deliver enhanced design instruction via asynchronous access to design resources and enhance network-based(More)
Turbulent flow in the continuous casting process involves transient phenomena and the transport of inclusion particles and plays an important role in the quality of the steel. As shown in Fig. 1, the molten steel jet entering the mold may carry inclusion particles (e.g. alumina) and argon bubbles. Liquid flux can also be entrained from the shear of the(More)
Transient flow during nominally steady conditions is responsible for many intermittent defects during the continuous casting of steel. The double-ruler electromagnetic field configuration, or ‘‘FC-Mold EMBr,’’ is popular in commercial slab casting as it provides independent control of the applied static field near the jet and free surface regions of the(More)
Transient flow events can be very important to the generation of quality problems during the continuous casting of steel. In this work, several different tools are applied to investigate these phenomena. Transient flow is computed using Large Eddy Simulation (LES) models, while conventional K-ε models yield time-averaged results. Particle Image Velocimetry(More)
We present details and performance of a pressure based multigrid solution procedure for the Navier-Stokes equations discretized on triangular grids. The discretization uses a control volume methodology, with linear inter-nodal variation of the flow variables. The use of the multigrid technique provides rapid and grid-independent rates of convergence. Three(More)
In this paper we study the particle transport and deposition in a turbulent square duct flow with an imposed magnetic field using Direct Numerical Simulations (DNS) of the continuous flow. A magnetic field induces a current and the interaction of this current with the magnetic field generates a Lorentz force which brakes the flow and modifies the flow(More)