Review of Critical Heat Flux (CHF) in Jet Impingement Boiling

Jet impingement boiling is a popular thermal management technique that caters to applications demanding very high heat dissipation rates. Like other boiling schemes, critical heat flux (CHF) is arguably the most important safety parameter for two-phase jet cooling, and determining CHF is often the starting point in a system's thermal design process. This article presents a systematized review of articles addressing jet impingement CHF. A very comprehensive search for studies is conducted, which includes research spanning over five decades and jets of various fluids, operating conditions, and geometrical configurations. Comprehensive lists of experimental jet CHF studies are given with detailed information on fluid, geometrical parameters, operating conditions, and notable conclusions. Parametric effects on CHF are also discussed in a systematic manner. Various techniques for increasing CHF, such as surface modification (including surface curvature, extended surface structures, surface coatings, or combinations thereof), specialized spent fluid removal schemes, and nanofluids, are discussed. An exhaustive list of CHF correlations is provided, along with the development rationale and applicability range for each. Also discussed are CHF trends for hybrid cooling schemes which combine jet impingement with other boiling schemes such as channel flow. The review is concluded with major conclusions and recommendations for future work. (C) 2021 Elsevier Ltd. All rights reserved.