Boiling and Two-Phase Flow in Narrow Channels

Kandlikar, Satish G.

doi:10.1007/978-3-319-32003-8_48-1

Cited by 1 publication

(1 citation statement)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Operation of the cooling system can be optimized by choosing appropriate flow rates of the liquid and gas and an appropriate flow regime that ensures the greatest heat transfer coefficient. As the characteristic size of the channel decreases, earlier known types of two-phase flow instabilities change and new types of instabilities appear [7][8][9]. The wettability and capillary forces in microchannels significantly affect the formation of two-phase flow regimes.…”

Section: Introductionmentioning

confidence: 99%

Influence of Liquid Properties on Gas-Liquid Flow Regimes and Pressure Drop in a Flat Microchannel

Ronshin

Dementyev

2021

J. Engin. Thermophys.

View full text Add to dashboard Cite

An urgent problem at the moment is to study various microchannel systems owing to the trend of miniaturization of devices. The present study is aimed at investigating the properties of the working liquid on the regimes of a two-phase flow and pressure drop in a flat microchannel 130 μm high. The high-speed schlieren method is used for visualization of fast processes that occur in the microchannel. It is shown that the working liquid properties and microchannel wall wettability produce a significant effect on the two-phase flow regimes and transitions between them. Regions of jet, bubble, and churn flow regimes are observed at identical Weber numbers of the liquid and gas for different working liquids. The hydraulic resistance of various working liquids is studied. It is demonstrated that drastic jumps with an increase in the superficial gas velocity are observed for water during the transition to the churn flow regime. This feature is associated with washout of dry spots with an increase in the superficial liquid velocity owing to a significant effect of the hysteresis of the contact angle of wetting.

show abstract

Section: Introductionmentioning

confidence: 99%