Heat transfer and pressure drop correlations for direct on-chip microscale jet impingement cooling with alternating feeding and draining jets. (January 2022)

• Record Type: Journal Article
• Authors: Wei, Tiwei; Oprins, Herman; Fang, Liang; Cherman, Vladimir; Beyne, Eric; Baelmans, M.
• Is Part Of: International journal of heat and mass transfer. Volume 182(2022)
• Publication Date: 2022-01
• Subjects: Impingement jet cooling -- Scaling analysis -- Unit cell -- Nusselt correlations -- Friction factor; Heat -- Transmission -- Periodicals; Mass transfer -- Periodicals; Chaleur -- Transmission -- Périodiques; Transfert de masse -- Périodiques; Electronic journals; 621.4022
• DOI: 10.1016/j.ijheatmasstransfer.2021.121865
• Languages: English
• ISSNs: 0017-9310

Abstract

Highlight: New correlations for multi-jets cooling array with distributed outlet are developed. Correlation predicts well with experimental data and also data from the literature. Multiple CFD simulations are performed on a unit symmetric cell of the array. Nozzle scaling analysis is performed based on dimensionless nozzle parameter. The substrate conduction effects are considered in the conjugate CFD analysis. Abstract: Jet impingement cooling with distributed outlet configuration is regarded as an efficient cooling solution for high performance systems. This work develops the Nusselt number Nu ¯ f - R e d and pressure drop k -factor correlations for microscale multi-jet impingement cooling with alternating feeding and draining jets. An extensive design of experiments (DOE) of unit cell modeling-based simulations is used for the correlation fitting. In order to understand the flow and thermal behavior, the impact of single variables including the inlet diameter, outlet diameter, jet-to-target distance and nozzle length is studied systematically. On the other hand, this work firstly shows the predictive model with k - R e d, including the impact of nozzle length t/L, cavity height H/L and inlet diameter ratio d i /L. Finally, the extracted correlations are experimentally validated, both with experimental data of different jet impingement demonstrators, as well as with the literature experimental data.