Experimental and Numerical Investigation of Thin Liquid Film in Embedded Oscillating Heat Pipes with
Abstract
Approved for Public Release The proposed fundamental research aims to fabricate embedded oscillating heat pipes (OHPs) of hydraulic, diameter less than 100 m at the wafer scale, operate with different working fluids, and characterize the heat transfer characteris,tics and performance. Such OHPs will work as ultra low-profile thermal spreaders and can be integrated/built into tightly packed hig,h-power density electronics for thermal management. Computational fluid dynamics simulations will be performed where disjoining pres,sure effects will be included, and simulation results will be compared against experimental data. Validated simulations can advance, our understanding on operation conditions and limitations of OHPs, and can help mitigate design issues and extend their heat dissip,ation capability. Further, novel flat surface coatings will be developed by co-sputtering various elements, where machine learning a,lgorithm will be used to identify elements and co-sputtering conditions in order to create novel flat coatings with desired and extr,eme wettability. Such coatings will not need micro/nano structures, can potentially have higher durability and can help enhance heat, flux dissipation of OHPs. The fabricated OHP will also be used for measuring the thickness of a liquid film present between the vap,or plug and the surface using two independent non-contact optical techniques: Michelson interferometry with phase-locked configurati,on, and spectral reflectometry. Knowledge of the liquid film thickness is critical towards functioning as well as advancement of the, OHP. The outcomes of the proposed fundamental research work can enable thermal management of high power density electronics associa,ted with Advanced Naval Power Systems by creating low-profile OHPs and advancing OHP performance, advance thermal science and techno,logy through the fundamental measurement of thin liquid films in OHPs using non-contact optical techniques, develop predictive heat, transfer simulations of OHPs to optimize design, and enable applicability of novel coatings and thin film measurement techniques to, a variety of other phase-change heat transfer applications.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 08, 2022
- Source ID
- N000142212169
Entities
People
- Shalabh C Maroo
Organizations
- Office of Naval Research
- Syracuse University
- United States Navy