My Research

Journal Papers:

Subradip Debnath, Vinay Arya, BoHung Kim, Chirodeep Bakli, and Suman Chakraborty. "Interplay of topography, wettability, and confinement controls boiling of water over functionalized graphene interfaces." Energy (2025); weblink: https://doi.org/10.1016/j.energy.2025.137284
Avinash Kumar, Subradip Debnath, and Chirodeep Bakli. "A facile design of porous heat sink optimized thermodynamically for thermo-hydraulic performance," Applied Thermal Engineering; (2024); weblink: https://doi.org/10.1016/j.applthermaleng.2024.123574

Conferences:

Subradip Debnath, Abhirup Chaudhuri, Chirodeep Bakli and Suman Chakraborty, "Anomalous boiling of saline water in graphene nanoconfinement,” APS Global Physics Summit, scheduled for March 2025, Abstract ID: 2979980. (Submitted).
Subradip Debnath, Anirban Roy, Aditya Patwari, Chirodeep Bakli, Suman Chakraborty, "Tuning the dynamic wetting characteristics of a sessile droplet on a metallic platform through surfactant additives under ambient cooling", The 2nd International Conference on Fluid, Thermal and Energy Systems (ICFTES’24), Paper id:215.
Subradip Debnath, Avinash Kumar, Chirodeep Bakli and Suman Chakraborty, "Coalescence of Saltwater Droplets Dispersed in Crude Oil: Coupled Effects of Fluid Rheology and Electric Field" 9th Fluid Mechanics and Fluid Power (2022), Roorkee, India, December 14-16 (accepted for oral presentation); FMFP2022–8168

Workshop Presentations:

Presentation entitled " Dynamics of Leidenfrost Droplets" in 3rd International Conference on Fluids under Confinement 2023, IIT Kharagpur

Tuning Solid-Liquid Interfaces at Micro and Nano Scales

Tuning solid-liquid interfaces at micro and nano scales is a rapidly developing field with a wide range of potential applications. By modifying a solid's surface chemistry or topography, it is possible to change its wettability, adhesion, and other properties. Tuning solid-liquid interfaces at the micro and nano scales is already being used in a variety of applications, such as self-cleaning coatings, microfluidic devices, wettability sensors, heat transfer devices, self-assembly applications, catalysts, and thermal management devices.

Problem 1: Thermodynamically Optimised Heat Sink

Thermodynamically optimized heat sinks enhance heat transfer, energy efficiency, and reliability in electronic devices by optimizing shape, materials, and surface qualities.

Status: Published (Applied Thermal Engineering, 2024). https://doi.org/10.1016/j.applthermaleng.2024.123574

Problem 2: Boiling at the nanoscale on a 2D Graphene surface:

Graphene's unique properties affect boiling at the nanoscale, which can be used to create an analysis of complex geometries, such as heat sinks and integrated circuits, to identify thermal hotspots and optimize cooling strategies for electronic devices. For example, a graphene surface with a Leidenfrost effect can repel water droplets or handle liquids at high temperatures Status: Manuscript under prep.

Problem 3:Viscoelastic leidenfrost phenomena

This study presents a computational and theoretical analysis of viscoelastic Leidenfrost droplets, focusing on the impact of polymeric and solvent viscosity on droplet behavior and vapor film characteristics. This has potential applications in thermal management, spray coating, and high-temperature droplet interactions, where precise control of droplet stability and oscillation is crucial.

Status: Manuscript under prep.

Problem 4: Coalescence of Saltwater Droplets Dispersed in Crude Oil: Coupled Effects of Fluid Rheology and Electric Field

Coalescence of saltwater droplets in crude oil is a complex process affected by fluid rheology and electric field. Fluid rheology governs the flow of oil and water, while electric field induces attractive forces between droplets. By understanding the coupled effects of these factors, we can develop new strategies to enhance oil-water separation.

Status: Published. FMFP2022–8168

Problem 5: Self Propulsion of droplets

Self-propulsion of droplets involves harnessing surface tension, chemical gradients, or external energy sources to enable droplets to move autonomously. This phenomenon has applications in microfluidics, lab-on-a-chip devices, offering precise control and efficiency.

Status: ongoing

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