Debanjana Basu

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Results of quantum mechanical simulations of the influence of edge disorder on transport in graphene nanoribbon metal-oxide-semiconductor field-effect transistors ͑MOSFETs͒ are reported. The addition of edge disorder significantly reduces ON-state currents and increases OFF-state currents, and introduces wide variability across devices. These effects(More)
In this paper, a three-tier model of phytoplankton, zooplankton and nutrient is considered and stability of different equilibrium points is analyzed along with Hopf-bifurcation around coexisting equilibrium point. Here, we have assumed toxication process as the guiding factor for bloom formation as well as its termination and this process is incorporated(More)
This paper presents the results of a study conducted to assess hybrid RANS/LES methods in the prediction of separated high-speed flows. The study focuses on the unsteady flow and acoustic fields associated with supersonic flow over an open cavity. Numerical results are obtained from explicit time marching simulations using the 3 rd order Roe scheme and both(More)
This paper presents a methodology for three-dimensional numerical simulations of super-cooled water droplet trajectories through aeroengine rotating machinery. Both flow and droplets' governing equations are formulated and solved in the reference frame of rotating blades. A Eulerian-Lagrangian approach is used for the continuous and discrete phases with(More)
This paper proposes two DES (Detached Eddy Simulation) model and one hybrid RANS (Reynolds Averaged Navier-Stokes)/ LES (Large Eddy Simulation) model for the simulations of unsteady separated turbulent flows. The two-equation k-based models are implemented in a full 3-D Navier Stokes solver and simulations are carried out using a 3 rd order Roe scheme. The(More)
This paper presents computational results for two DES (Detached Eddy Simulation), one hybrid RANS (Reynolds Averaged Navier-Stokes)/ LES (Large Eddy Simulation) and some preliminary results from PANS (Partially Averaged Navier-Stokes) turbulence for simulation of unsteady separated turbulent flows. The models are implemented in a full 3-D Navier Stokes(More)
This paper presents a methodology for numerical simulations of super-cooled three-dimensional (3-D) water droplet trajectories through aeroengine rotating machinery that includes the effect of energy exchange between the droplets and flow. The governing equations for both flow and droplets are formulated and solved within the reference frame of rotating(More)