An experimental investigation of enhanced pool boiling heat transfer from surfaces with micro/nano-structures

Dong, Lu; Quan, Xiaojun; Cheng, Ping

doi:10.1016/j.ijheatmasstransfer.2013.11.068

Cited by 263 publications

(65 citation statements)

References 24 publications

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“…It becomes necessary to deposit additional layers that enhance heat transfer surface. Here, the following techniques can be distinguished: -various structures obtained by pressing or bending ribs [9], [10]; -modifying of the heating surface by increasing its roughness mechanically or technologically [11], [12]; -imposing additional laminar-composite layers with preset parameters [13], [14].…”

Section: Introductionmentioning

confidence: 99%

Boiling on fins with wire screen of variable effective conductivity

Orzechowski

2017

EPJ Web Conf.

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Abstract. The high scale of integration of modern equipment used for medical, military and other purposes puts heavy demands as regards the removal of great heat fluxes. This can be achieved only in exchangers that apply the phase change phenomena. Among many methods to improve boiling heat transfer, the wire mesh covering demonstrates some advantages due to the possibilities of designing the desired microstructure parameters, availability on the market, and low cost. The wire mesh microstucture with specified geometrical parameters produces anisotropy in conductivity. The different arrangement of the mesh layers relative to the direction of the heat flux is a cause of the change of temperature distribution within the layer. The consequence is a respective change in the discharge conditions of the gas phase and liquid feed. The experiments were conducted on fins covered with a single layer of copper mesh with lumen of 38 % and boiling FC-72 at ambient pressure. Compared with the smooth surface, the wire mesh structures yield an increase in the heat transfer rate at boiling. It is also shown that nucleate boiling is initiated at lower wall superheat. Formulas for longitudinal and perpendicular thermal conductivity are given for different mesh structure arrangements.

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Section: Introductionmentioning

confidence: 99%

Boiling on fins with wire screen of variable effective conductivity

Orzechowski

2017

EPJ Web Conf.

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“…In order to further enhance the boiling heat transfer, many methods have been proposed, including surface modification, microchannel sink and surfactant addition in boiling, etc. [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

On the mechanism of boiling heat transfer enhancement by surfactant addition

Wang

2016

International Journal of Heat and Mass Transfer

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“…Two main surface characteristics influence boiling (and particularly pool boiling): micro/nano-structure addition and wettability modification. The micro/nanostructure addition has a well-known influence on boiling [9][10][11][12]. A number of studies have dealt with the enhancement of boiling heat transfer from electronic components by the use of surface microstructures [13].…”

Section: Introductionmentioning

confidence: 99%

Pool Boiling Versus Surface Wettability Characteristics

Villa

Georgoulas

Marengo³

et al. 2016

Proceedings of the World Congress on Momentum, Heat and Mass Transfer

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-The present paper reports results of pool boiling experiments on surfaces with different wettabilities. The main aim is to identify and quantify the difference in pool boiling characteristics (Onset of Nucleate Boiling-ONB, bubble detachment diameter and time) between Hydrophilic Surfaces (HPS) and Super-Hydrophobic Surfaces (SHS). A combined sample (SHS_D) with an inner SHS part and an outer HPS part is also tested, which clearly shows that the Super-Hydrophobic surface is a preferential area for the ONB, and allows to control the bubbling position. It is found that not only the ONB, but also the bubble growth and detachment characteristics are highly influenced by the wettability of the heated surface. The analysis of the experimental results reveals that SHSs require a lower wall-superheat for ONB to occur. Moreover, in SHSs higher bubble departure times as well as higher equivalent bubble detachment diameters are encountered. The vapour phase tends to stick stronger on a SHS than on a HPS, showing a tendency to create a vapour film. Furthermore, using a post processing method developed in MATLAB, the apparent contact angle at various successive time instances is extracted from the experimental snapshots for the cases of the HPS and the SHS_D. Finally, the capability of a previously verified, enhanced, CFD-based, VOF numerical model [1-3] to capture adequately the apparent triple line contact angle, from the nucleation up to the departure of an isolated bubble from the heated surface, is checked for one of the considered superheats for a HPS case.

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An experimental investigation of enhanced pool boiling heat transfer from surfaces with micro/nano-structures

Cited by 263 publications

References 24 publications

Boiling on fins with wire screen of variable effective conductivity

Boiling on fins with wire screen of variable effective conductivity

On the mechanism of boiling heat transfer enhancement by surfactant addition

Pool Boiling Versus Surface Wettability Characteristics

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