Effect of GNP/Ni-TiO2 Nanocomposite Coated Copper Surfaces Fabricated by Electro Chemical Deposition under Nucleate Pool Boiling Regime: A Comprehensive Experimental Study

IF 1.1 4区工程技术 Q4 MECHANICS

Journal of Applied Fluid Mechanics Pub Date : 2024-01-01 DOI:10.47176/jafm.17.3.2052

B. Shil, D. Sen, A. K. Das, P. Sen, S. Kalita

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引用次数: 0

Abstract

Current study presents an experimental analysis of nucleate pool boiling on the GNP/Ni-TiO2 (GNP-graphene nano particle) nano-composite coated copper surfaces. In order to produce the microporous surfaces, a two-step electro-deposition process is used. This deposition results in the formation of a modified surface structure, and various surface morphological characteristics of this modified structure, like wettability, roughness and surface structure are studied. The results reveal an improvement in CHF (critical heat flux) and BHTC (boiling heat transfer coefficient) in case of GNP/Ni-TiO2 coated surfaces. The main elements influencing the improved heat transfer of the GNP/Ni-TiO2nano-composite coating are its increased wettability, roughness, and high thermal conductivity. The SNCCC (superhydrophilic nano-composite coated copper) surfaces have the maximum BHTC of 97.52 (kW/m2K) and CHF of 2043 (kW/m2), which are 93% and 88% higher than the base Cu surfaces respectively. Here, it is analysed how the performance of SNCCC surfaces are enhanced by the impact of different parameters, like the roughness of the surface and wettability. The bubble characteristics at the time of boiling is noticed using a high-speed camera, and several factors such as nucleation site density, bubble departure diameter, and bubble emission frequency are statistically studied for SNCCC surfaces.

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在核酸池沸腾条件下通过电化学沉积制造的 GNP/Ni-TiO2 纳米复合材料镀铜表面的影响：综合实验研究

本研究对 GNP/Ni-TiO2（GNP-石墨烯纳米颗粒）纳米复合材料镀铜表面的核池沸腾进行了实验分析。为了产生微孔表面，采用了两步电沉积工艺。这种沉积会形成改性的表面结构，研究了这种改性结构的各种表面形态特征，如润湿性、粗糙度和表面结构。研究结果表明，GNP/Ni-TiO2 涂层表面的 CHF（临界热通量）和 BHTC（沸腾传热系数）均有所改善。影响 GNP/Ni-TiO2 纳米复合涂层传热性能改善的主要因素是其润湿性、粗糙度和高导热性的增加。SNCCC（超亲水纳米复合涂层铜）表面的最大 BHTC 为 97.52（kW/m2K），CHF 为 2043（kW/m2），分别比基本铜表面高 93% 和 88%。本文分析了 SNCCC 表面的性能如何受不同参数（如表面粗糙度和润湿性）的影响而提高。使用高速照相机观察沸腾时的气泡特征，并对 SNCCC 表面的成核点密度、气泡离去直径和气泡发射频率等几个因素进行统计研究。

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来源期刊

Journal of Applied Fluid Mechanics THERMODYNAMICS-MECHANICS

CiteScore

2.00

自引率

20.00%

发文量

138

审稿时长

>12 weeks

期刊介绍： The Journal of Applied Fluid Mechanics (JAFM) is an international, peer-reviewed journal which covers a wide range of theoretical, numerical and experimental aspects in fluid mechanics. The emphasis is on the applications in different engineering fields rather than on pure mathematical or physical aspects in fluid mechanics. Although many high quality journals pertaining to different aspects of fluid mechanics presently exist, research in the field is rapidly escalating. The motivation for this new fluid mechanics journal is driven by the following points: (1) there is a need to have an e-journal accessible to all fluid mechanics researchers, (2) scientists from third- world countries need a venue that does not incur publication costs, (3) quality papers deserve rapid and fast publication through an efficient peer review process, and (4) an outlet is needed for rapid dissemination of fluid mechanics conferences held in Asian countries. Pertaining to this latter point, there presently exist some excellent conferences devoted to the promotion of fluid mechanics in the region such as the Asian Congress of Fluid Mechanics which began in 1980 and nominally takes place in one of the Asian countries every two years. We hope that the proposed journal provides and additional impetus for promoting applied fluids research and associated activities in this continent. The journal is under the umbrella of the Physics Society of Iran with the collaboration of Isfahan University of Technology (IUT) .