RESEARCH

• Multiphase Heat Transfer
• Computational Fluid Dynamics
• Interface Tracking
• Direct Numerical Simulation
• Eulerian Multiphase
• Rod Bundle Heat Transfer
• DNB prediction
• Natural Convection

Component Scale Boiling Heat Transfer

• Modelling, meshing and CFD analysis for industrial size components such as nuclear rod bundles
• Study of the DNB prediction restriction currently prevalent in wall boiling models
• Study on the structure and behaviour of the wall boiling model and its sensitivity to the various constituent bubble parameters (departure diameter, nucleation site density, departure frequency)
• CFD Studies on the physics of Onset of significant void (OSV) location in subcooled flow boiling.
• Analysis of the effect of the non-drag bubble interfacial interaction terms (Lift, Virtual Mass Force, Turbulent Dispersion Force & wall lubrication force) on the radial void distribution

Interface Tracking-DNS based Micro-scale Boiling Heat Transfer

• DNS studies on sliding heat transfer and characterizing the model of heat transfer for quenching heat transfer.
• Surface Energy based re-interpretation of the Micro-scale bubble-wall contact dynamics in a Phase Field framework.
• Bridging the Component Scale Boiling and Micro-scale boiling: Using DNS code to study the bubble growth rates and other related physics and incorporating it into the wall boiling model and other related components.

EPSRC Indo-UK collaboration, Imperial College London

Involved in various projects between the Imperial College team and Bhabha Atomic research Centre (BARC) in the Indo-UK collaboration. Comprised of 4-5 projects such as: annular flow droplet entrainment study, buoyancy driven flow studies and High Pressure CHF studies and, low and high pressure boiling heat transfer.

Nuclear Power Corporation Limited (India) Project

Study of flow and heat transfer through creep distorted rod bundles. This involved study of the effect of rod bundle sub-channel isolation on Departure From Nucleate Boiling (DNB) occurrence

Helicopter Brownout (Multi-University Research Initiative (MURI) project, USA)

Experiments were conducted using flow visualisation and phase-resolved PIV to examine the fluid dynamics of a rotor wake as it interacts with the horizontal ground plane. The test flight condition under study was of a rotor in hover.