Modelling of multiphase fluid-structure interaction


This study deals with the high-fidelity simulations of fluid-structure interaction behaviour of multiple rigid bodies with six degrees-of-freedom in multi-phase flows using volume of fluid approach and overset meshing strategy available in OpenFOAM. The focus is to gain a proper understanding of the complex hydrodynamic features of the water-entry and water-impact problems, such as free-falling bodies into calm water, which often play a pivotal role in offshore Engineering.

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Turbulent Simulation of Massively Separated Unsteady Flows


This study is focussed on investigating the unsteady flow-field characteristics in moderately high Reynolds number regime using hybrid Large-Eddy/Reynolds-Averaged Navier-Stokes (LES/RANS) and RANS simulations. Hybrid strategies, such as Delayed Detached Eddy Simulation (DDES), DDES with Improved wall modeling capability (IDDES), Walled-Modelled LES (WMLES) are employed to capture the massively detached flow structures using OpenFOAM and SU2 and the results are validated with experimental results.

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Modelling flow-induced vibration of tandem flapping foils using FEM approach


This study focuses on investigating the flow-induced vibration of two passively flapping foils in tandem condition using an inhouse cut-FEM-based FSI solver. This study is being carried out in collaboration with Dr. Chennakesava Kadapa, University of Bolton, U.K.

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Flow Energy Harvesting from Vortex-Induced Vibration and Galloping Phenomena


This study deals with the experimental and numerical investigation aiming for a improved design of flow energy harvestors with splitters and enhancing the harvesting capacity through transition between VIV and galloping. This study is being carried out in collaboration with Dr. Junlei Wang, ZhengZhou University.

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FSI Dynamics of a Chord-wise Flexible Flapping in the Wake of a Bluff-Body


The study deals with the numerical investigation of the FSI dynamics of a chord-wise flexible flapper subjected to a fluctuating inflow in terms of the wake of a rigid cylinder situated upstream at low Reynolds number regime. using a strongly coupled partitioned FSI solver based on finite volume approach.

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Dynamical transition in the unsteady flow field of rigid and flexible flapping wings


The nature of wake patterns behind flapping wings hold the key to the aerodynamic load generation. The manifestation of chaos in the flow-field behind periodically flapping foils is an interesting phenomenon which, in turn, results in chaotic force generation. The leading-edge vortex is found to be the primary trigger behind the transition from order to chaos in the flow topology. Even a small erratic behavior in the leading-edge vortex could spell a complete eventual breakdown of a regular wake, which is sustained by the frequent and spontaneous formation of the vortex couples and the subsequent vortex interactions. In the presence of stochastic flow-fluctuation, two qualitatively different ‘on-off’ and ‘burst-type’ intermittency behavior is observed in the flexible flapping response.

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