Dr. Debdeep Bhattacharjee research portfolio demonstrates a strong foundation in multiphase flow dynamics, magnetohydrodynamics, and ferrofluidic systems, emphasizing the coupling of magnetic fields with interfacial fluid behavior at micro and meso scales. The work focuses on understanding and manipulating ferrofluid droplet deformation, coalescence, and wettability under varying magnetic field configurations, contributing to advancements in droplet-based microfluidics, lab-on-chip technologies, and tunable surface engineering. Investigations into the deformation dynamics of ferrofluid drops with field-dependent local magnetization have revealed critical insights into magneto-capillary interactions and droplet morphology control. The exploration of magnetowetting and magneto-dewetting phenomena has expanded the understanding of field-induced wetting transitions on hydrophobic and textured substrates. Complementary studies on compound droplet dynamics, passive droplet sorting in microchannels, and topology optimization of packed-bed microreactors integrate computational fluid dynamics (CFD), topology optimization, and non-Newtonian flow modeling to enhance microreactor design and process intensification. The research employs both analytical modeling and high-fidelity numerical simulations using COMSOL Multiphysics and Ansys Fluent, bridging theoretical and applied aspects of magnetically driven flows. Collectively, these contributions advance the frontiers of microfluidic transport, smart interface control, and ferrohydrodynamic applications for next-generation energy, biomedical, and process engineering technologies.