Interests: Microchannel Flow Boiling; Phase Change Heat Transfer; Microfluidics; Thermal management; Solar Thermal; Solar PV and Hybrid systems; HVAC systems.
Dr. Karthik Balasubramanian, obtained his B.Tech in Mechanical Engineering from Anna University Chennai, M.Tech in Heat Power Engineering from BIT Mesra, Ranchi and PhD from National University of Singapore, Singapore. He was a Post-Doctoral Fellow at NUS for one year post his PhD.
Dr. Karthik has worked on microchannel cooling for nearly six years in National University of Singapore (NUS) and has strong expertise in experimental techniques. He has invented novel techniques to minimize pressure drop fluctuations for stable flow boiling with enhanced heat transfer through microchannels and his work is patent pending. He made efforts to mitigate or minimize the flow boiling instabilities using the passive technique of simple modifications in the microchannel geometry. He achieved stable flow boiling and enhanced heat transfer performances and also brought out crucial fundamental understandings about flow boiling in microchannels.
The patent pending technology developed during the course of his PhD was scaled upto fit the thermal management needs of power electronics users like SMRT, Metro trains in Singapore. The project involved both numerical simulation aspects for uniform flow distribution of coolant through the heat sink (cold plate) and experimental investigations to study the actual heat transfer and pressure drop performance of the developed cold plate. Dr. Karthik, joined the Department of Mechanical Engineering, National Institute of Technology Warangal, in the year 2014.
ME305 - Mechanical Measurements - 3rd B.Tech Mechanical
ME401 - Refrigeration and Air-Conditioning - 4th B.Tech Mechanical
ME362 - Automobile Engineering - 3rd B.Tech Mechanical
ME463 - Gas Dynamics - 4th B.Tech Mechanical
ME576 - Convective Heat Transfer - 4th B.Tech Mechanical
Heat Transfer and Fuels Lab
Mechanical Measurements Lab
Energy systems Lab
1. Balasubramanian, K. and Lee, P. S., 2012, "Two-Phase Stepped Fin Microchannel Heat Sink for Enhanced Heat Transfer and Reduced Pressure Drop", PCT Patent Application No.: PCT/SG2012/000416. (https://www.google.com/patents/US20140311725)
|S.No.||Name of the candidate||Reg.no||Research area||Batch (year)||Status (ongoing/completed)|
|1||Valaparla.Ranjith Kumar||715025||Thermal management of solar photovoltaics||July 2015||Ongoing|
|2||Y. Siva Kumar Reddy||716014||Liquid Desiccant Air condtitioning (Thermal section)||January 2016||Ongoing|
At NIT Warangal
Title of the Project
Novel cooling techniques and materials for a reliable and efficient solar energy harvester
ÂÂÂÂÂÂÂÂAs Post-Doctoral Fellow at NUS Singapore
Projects involved in
Amount Awarded in SGD
Duration of Award
Stabilized Two-Phase Micro/Mini-Channel Cooling for Effective Thermal Management of Next Generation Electronics
08/2010 - 01/2014
Investigations on Microscale Transport Phenomena in Novel Oblique Structures
10/2012 - 09/2015
Stabilized Two-Phase Cooling for Effective Thermal Management of Power Electronics
02/2013 - 02/2014
Flow boiling stabilization in microchannels for effective cooling
Efforts were made to mitigate or minimize the flow boiling instabilities using the passive technique of simple modifications in the microchannel geometry. Two novel geometries, expanding microchannels and the stepped fin microchannels, were studied and benchmarked against straight microchannels. Careful, flow boiling experimental investigations were conducted with high speed visualizations. The heat transfer characteristics, two-phase pressure drop and instabilities in individual geometries were studied in detail and the mechanism of heat transfer was identified and explained based on the existent flow boiling regimes. Achieved stable flow boiling and enhanced heat transfer performances. Also brought out crucial fundamental understandings about flow boiling in microchannels.
ÂÂÂÂÂÂÂÂStabilized Two-Phase Cooling for Effective Thermal Management of Power Electronics
The patent pending technology developed during the course of my PhD was scaled up in this project to fit the thermal management needs of power electronics users like SMRT. This project involved both numerical simulation aspects for uniform flow distribution of coolant through the heat sink (cold plate) and experimental investigations to study the actual heat transfer and pressure drop performance of the developed cold plate.
Actively participated in drafting several project proposals to various funding agencies in Singapore, three out of which turned out successful, from prestigious funding agencies like Agency for Science Technology And Research (ASTAR), Ministry Of Education (MOE) and National Research Foundation (NRF). The ASTAR project is majorly based on ideas from my doctoral thesis and the NRF project is based on implementation of the patent pending technology that I developed during the course of my PhD, for stable two-phase cooling.
As Research Scholar at NUS Singapore
1. Lab in-charge - Measurements Lab (From 2014 - 15)
2. Faculty adviser - 2nd B.Tech Mechanical (From AY 2015 - 16)
3. Faculty adviser - Go-Kart Team
4. Member - Department Academic Audit Committee (DAAC)
5. Member - FIST project
6. Faculty Treasurer - Mechanical Engineering Association
1. Core Team Member - Center for Continuing Education (CCE)
2. Evaluation panel member - EPICS (Engineering Project In Community Service) @ NITW
3. Resource person - TLC