Journal ArticleDOI
An Experimental Investigation on the Influence of Copper Ageing on Flow Boiling in a Copper Microchannel
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In this paper, the influence of copper ageing on flow boiling heat transfer and pressure drop in copper microchannels of two different hydraulic diameters was investigated, and the experimental results showed that the influence was negligible.Abstract:
The study reports the experimental investigation on the influence of copper ageing on flow boiling heat transfer and pressure drop in copper microchannels of two different hydraulic diamete...read more
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Experimental investigation of flow boiling in rectangular mini/micro-channels of different aspect ratios without and with vapour venting membrane
TL;DR: In this paper, the influence of vapour venting on the flow boiling pressure drop and heat transfer of water in copper mini/micro-channels of three different aspect ratios was investigated.
Journal ArticleDOI
Effect of boiling-induced aging on pool boiling heat transfer performance of untreated and laser-textured copper surfaces
TL;DR: In this article, the aging behavior of an untreated and a laser-textured copper boiling surface during an eight-day testing period under pool boiling conditions using saturated water at atmospheric pressure was investigated.
Journal ArticleDOI
Significance of surface modification on nucleate pool boiling heat transfer characteristics of refrigerant R-141b
TL;DR: In this article, the significance of surface modification on the heat transport phenomena under nucleate pool boiling configuration of saturated R-141b at ambient condition over SiO2 thin film (TF) nanocoated surfaces was investigated.
Journal ArticleDOI
Modeling of pressure drop and heat transfer for flow boiling in a mini/micro-channel of rectangular cross-section
TL;DR: In this paper, a one-dimensional model is proposed to estimate the pressure drop and heat transfer coefficient for flow boiling in a rectangular microchannel, taking into account the pressure fluctuations caused due to the confined bubble growth and the effect of pressure fluctuations on the heat transfer characteristics.
Journal ArticleDOI
On the Prediction of Pressure Fluctuations and Pressure Drop Caused by Confined Bubble Growth During Flow Boiling in a Rectangular Mini/Micro-Channel
Shashwat Jain,Sateesh Gedupudi +1 more
TL;DR: In this paper, heat sinks based on flow boiling in microchannels have the potential to mitigate temperature rise in high heat flux devices such as electronic equipment. But the major challenge is the instabil...
References
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Journal ArticleDOI
A study of discrepancies in flow boiling results in small to microdiameter metallic tubes
TL;DR: In this article, the authors investigated experimentally two important parameters that may contribute in explaining the scatter in the published heat transfer results, i.e., tube inner surface characteristics and the length of the heated section.
Journal ArticleDOI
Measurements and flow pattern visualizations of two-phase flow boiling in single channel microevaporators
E. Galvis,Richard Culham +1 more
TL;DR: In this paper, high speed visualization was performed simultaneously with heat transfer and pressure drop measurements to support the quantitative experimental data for better understanding of two-phase flow characteristics in microchannel evaporators.
Journal ArticleDOI
Flow boiling of R245fa in 1.1 mm diameter stainless steel, brass and copper tubes
TL;DR: In this paper, an experimental study of flow boiling heat transfer and pressure drop was conducted using R245fa in stainless steel, brass and copper tubes of 1.1mm internal diameter.
Journal ArticleDOI
Oxidation-Rate Excursions During the Oxidation of Copper in Gaseous Environments at Moderate Temperatures
Z. Feng,C. R. Marks,A. Barkatt +2 more
TL;DR: In this paper, the authors investigated the kinetics of oxidation of copper powders in oxygen and in dry and humid air using thermogravimetric analysis (TGA) and found that the extent of oxidation grew linearly with time until the weight-based thickness of the oxide film reached 0.13-1.22 nm, depending on the temperature.
Journal ArticleDOI
Surface effects in flow boiling of R134a in microtubes
TL;DR: In this article, a comparison between experimental flow boiling heat transfer results obtained using two different metallic tubes is presented in the form of local heat transfer coefficient versus local quality and axial distance.