Received the UCF Doctoral Research Support Award

December 8, 2020

I am excited to announce that I have received the UCF Doctoral Research Support Award!! I feel humbled that UCF College of Graduate Studies selected me for this funding support which will be beneficial to conduct further research studies towards my PhD dissertation at University of Central Florida. Thank you Dr. Shawn Putnam (my PhD supervisor), Associate Professor of UCF Mechanical and Aerospace Engineering and my labmates for continuous encouragement and support!

Highlighted on UCF News for Three Minute Thesis (3MT) Competition Runner-up place

November 30, 2020

“Hosted by the College of Graduate Studies and the Office of Research, ten finalists came from a wide range of disciplines, including criminal justice, engineering, sciences, nursing, sociology, and education. Lauren Thomas from curriculum and instruction took first place with her presentation on Interrupting the Achievement Gap Ideology ; Khan Mohammad Rabbi from mechanical engineering took second with his research on cooling devices, and Anicia Arredondo from planetary sciences came in third with her explanation of the understanding of near-earth asteroids." - Story written by Thalia Torres and photo by UCF news.
https://www.ucf.edu/news/college-of-community-innovation-and-education-student-wins-ucf-3mt-research-competition/

Received Runner-up Award UCF Three Minute Thesis (3MT) Competition

November 18, 2020

“Doctoral research is presented in a novel and exciting way at UCF’s Three Minute Thesis (3MT) competition. Doctoral students communicate their research in just three short minutes and with only one PowerPoint slide to non-expert judges while competing to win scholarship awards. First developed in 2008 by the University of Queensland in Australia, the popularity of the competition has increased and 3MT competitions are now held in over 600 universities across more than 59 countries worldwide. "
https://twitter.com/UCFGradStudies/status/1329522335322353668

Highlighted on WFTV Channel 9 Eyewitness News

October 16, 2020

Source credit: Angela Jacobs WFTV (Channel 9)

Research paper reference: Khan M. Rabbi, J. Carter, J. and S. Putnam, 2020. Understanding pulsed jet impingement cooling by instantaneous heat flux matching at solid-liquid interfaces. Physical Review Fluids, 5(9), p.094003. The UCF News: "UCF Researchers Are Working on Tech So Machines Can Thermally ‘Breathe’" (https://www.ucf.edu/news/ucf-research...) (News source credit: Dr. Robert Wells). Research lab: Interfacial Transport Lab, University of Central Florida, Orlando, FL, USA.

Interviewed with Techbriefs (Powered by Society of Automotive Engineers-SAE)

October 18, 2020

"University of Central Florida researchers are developing a human-like way for large machines to cool off and keep from overheating: Letting the machines "breathe." In effect, the machines "inhale" cool blasts of water and "exhale" surface heat, says Khan Rabbi, a doctoral candidate in UCF's Department of Mechanical and Aerospace Engineering. In a study, led by Rabbi, a pulsed water-jet cooled a machine's hot titanium surface. "The more water we pumped out of the spray jet nozzles, the greater the amount of heat that transferred between the solid titanium surface and the water droplets, thus cooling the titanium," said Rabbi. The water is emitted from small water-jet nozzles, about 10 times the thickness of a human hair. The tiny jets douse the large electronic system's surface and the water is collected in a storage chamber, where it can be pumped out and circulated again to repeat the cooling process."-Story by Billy Hurley (TB) and photo by: Karen Norum (UCF).

https://www.techbriefs.com/component/content/article/tb/stories/blog/37929

Highlighted by Professional Engineering Magazine by Institute of Mechanical Engineers (UK)

October 14, 2020

“Our technique used a pulsed water-jet to cool a hot titanium surface,” said Rabbi. “The more water we pumped out of the spray jet nozzles, the greater the amount of heat that transferred between the solid titanium surface and the water droplets, thus cooling the titanium. Fundamentally, an idea of optimum jet-pulsation needs to be generated to ensure maximum heat transfer performance.” He added: “It is essentially like exhaling the heat from the surface.” The water is emitted from small water-jet nozzles, about 10-times the thickness of a human hair, that douse a hot surface of a large electronic system. The water is collected in a storage chamber, where it can be pumped out and circulated again to repeat the cooling process. The storage chamber in the study held less than 300ml of water.

https://www.imeche.org/news/news-article/super-hot-machines-could-stay-cool-by-breathing

Highlighted in Major News and Media Outlets for Research on Pulsed Jet Cooling

October 13, 2020

"In the era of electric cars, machine learning and ultra-efficient vehicles for space travel, computers and hardware are operating faster and more efficiently. But this increase in power comes with a trade-off: They get superhot. To counter this, University of Central Florida researchers are developing a way for large machines to “breathe” in and out cooling blasts of water to keep their systems from overheating. The findings are detailed in a recent study in the journal Physical Review Fluids. The process is much like how humans and some animals breath in air to cool their bodies down, except in this case, the machines would be breathing in cool blasts of water, says Khan Rabbi, a doctoral candidate in UCF’s Department of Mechanical and Aerospace Engineering and lead author of the study." Read more

This full original story was written by Dr. Robert Wells for University of Central Florida News. This story is highlighted by major media outlets such as phys.org, Science Daily, EurekaAlert, ScienceCodex, Electronics360, Bioengineer.org and many more!

Published research article on pulsed liquid-jet cooling at Physical Review Fluids

September 11, 2020

Introducing flow pulsation into a water-jet cooling system allows for flow-field control for more efficient heat removal. Here, transient thermal mapping is used to quantify how a pulsed water jet in a falling-film geometry can enhance the overall cooling performance. It is found that the influence of the jet-pulsation frequency on the maximum cooling performance can be predicted by heat flux matching at the solid-liquid interface, while the optimum pulsation frequency is dictated by the thermofluid instabilities that occur in the falling film.

Paper: Rabbi, K.M., Carter, J. and Putnam, S.A., 2020. Understanding pulsed jet impingement cooling by instantaneous heat flux matching at solid-liquid interfaces. Physical Review Fluids, 5(9), p.094003.

(https://journals.aps.org/prfluids/abstract/10.1103/PhysRevFluids.5.094003)

Received IEEE iTherm 2020 Best Poster Award

August 24, 2020

I am humbled to announce that I won the “Best Poster Award” at IEEE iTherm 2020 for our research and elevator pitch on “A low-cost thermal mapping technique for electronics cooling using Quantum dots” at the Emerging Technologies and Fundamentals track. I would like thank my supervisor Dr. Shawn Putnam, undergraduate researcher Christopher Borden and all my colleagues from Interfacial Transport Lab at the University of Central Florida for their support throughout the project. I am thankful to National Science Foundation (NSF) and Office of Naval Research for funding this research project. I cordially thank the amazing judges, attendees, the wonderful iTherm organizing committee members, especially Dr. Vadlim Gektin, Dr. Justin A. Weibel, and Dr. Dustin Demetriou, and the sponsors EPS - IEEE Electronics Packaging Society, The University of Texas at Arlington, GE.

Highlighted in UCF Experiential Learning Social Media Page on National Intern Day

July 30, 2020

"We take pride in seeing our students achieve greats amounts of success through their different internship experiences. We want to highlight some of the most recent success stories that have come about from these past semesters. Congrats on your wonderful feats students and we look forward to what’s to come because of them" - UCF Experiential Learning
https://www.instagram.com/p/CDRpvXPhLit/

Received F-LEARN Best Poster Award by peer voting

May 7, 2019

I feel humbled and excited to say that my FLEARN UCF undergraduate research mentee Juan Sanchez has been awarded with 'Best Poster Award' by peer voting by competing with other young researchers from different disciplines of Photonics, Chemistry, Computer Science, Electrical Engineering, Psychology, Biomedical Science, Material Sciences and Engineering, and Mathematics. During Spring 2019, I felt honored to be awarded with the FLEARN Graduate Research Mentor (GRM) scholarship to mentor a UCF fresher (Juan Sanchez) to conduct hands-on research for 12 weeks in our lab (Interfacial Transport Lab, PI: Dr. Shawn A. Putnam). During this time, we set our goals, we planned accordingly, broke things apart, went back to drawing board and solved the puzzles. Finally, we developed a novel, and more importantly, cost effective technique to fabricate hydrophobic island surfaces to promote two-phase cooling with the major applications in data centers, microelectronics, reactor cooling, hot-spot cooling. I would like to thank FLEARN UCF to continuously promote undergraduate research and for giving the UCF PhD students the platform to practice mentoring. Keep the Springs coming!

http://mae.ucf.edu/ucf-student-ignites-passion-for-research-through-l-e-a-r-n-program/