Lin Lab Awarded Grant from NIST
Author: Lingnan Lin
Paper Published in Int. J. Heat Transf.
How is the heat transfer in two-phase flow related to single-phase flow? A new theory is proposed in our recent paper to answer this question.
The paper focuses on two-phase annular flow during condensation. We developed a simple, physics-based model that considers the thermal resistances for the boundary layers near the wall and the liquid-vapor interface. The model yields an analytical expression for the two-phase multiplier, suggesting that it scales linearly with the inverse of the liquid fraction. This is confirmed by experimental data. The scaling factor is linked to the dimensionless interface velocity (i.e., ratio of interface velocity to mean liquid velocity), which can be approximated as a universal constant. The model achieves prediction accuracy comparable to the existing empirical correlations, while offering the additional benefit of providing a physically grounded framework that can be further adapted and refined.
Congrats to Chase Yankowski, our first PhD student, on publishing his first (& Lin Lab’s first) journal paper. Look forward to more insights and discoveries coming out of this project.
Yankowski Awarded Clark Fellowship
Our grad student, Chase Yankowski, was awarded with the prestigious Clark Fellowship and named a Clark Doctoral Fellow. The Clark Doctoral Fellows Program supports high-performing engineering Ph.D. students at the A. James Clark School of Engineering. This fellowship recognizes the excellence and potential that Chase has demonstrated and will support his endeavors in research and pursuing Ph.D. Congratulations, Chase!
Lin Lab Attending TPTPR 2025
We attended the 7th IIR Conference on Thermophysical Properties and Transfer Processes of Refrigerants (TPTPR), held in UMD. We presented a conference paper (see below). Dr. Lin chaired the session “E1: Low-GWP Refrigerant Behaviors”.
C. Yankowski, B. Mullin, L. Lin, A Simple Model for Heat Transfer in Annular Two-Phase Flow, Paper 1148, 7th IIR Conference on Thermophysical Properties and Transfer Processes of Refrigerants, June 15-18, 2025, College Park, MD
Warmest Welcome to Summer Interns
This summer, we are delighted to have two interns join the lab – Zach Yashar and Joshua Ma. Zach is a rising junior from UIUC majoring in Mechanical Engineering with a minor in Economics. He is a Virginia local who graduated from Thomas Jefferson High School for Science and Technology. Joshua is a sophomore at Glenelg High School with a strong interest in pursuing a career in engineering.
It is fantastic to work with you, Zach and Joshua!
Dr. Lin Invited for Seminar at UMBC
Dr. Lin delivered a seminar in the Department of Mechanical Engineering at the University of Maryland, Baltimore County.
Seminar info: https://my3.my.umbc.edu/groups/me/posts/149519
Dr. Lin Invited for Seminar at ERAU
Dr. Lin was invited to give a seminar at the College of Engineering at the Embry-Riddle Aeronautical University.
2025Spring CEEE Consortium Meet
Congrats to Chase Yankowski on delivering his first public presentation in graduate school! He presented our recent work on flow condensation to an audience of industry leaders, as well as UMD students and faculty, during the spring meeting of the CEEE EEHP consortium. Great job, Chase!
Lin Lab Attending TFEC 2025
As the winter finally comes to an end, we came to DC downtown to attend the 10th Thermal and Fluids Engineering Conference (TFEC). Kudos to Chase and Henry who served as volunteers at the conference. Dr. Lin gave a talk on our recent works on flow condensation modeling. It was great to learn what’s happening in this fast growing field, while also connecting with peers in the community.
