Flow boiling in micro-scale channels – Synthesized literature review

2013 ◽  
Vol 36 (2) ◽  
pp. 301-324 ◽  
Author(s):  
Cristiano Bigonha Tibiriçá ◽  
Gherhardt Ribatski
Keyword(s):  
Literature Review ◽  
Flow Boiling ◽  
Micro Scale

An investigation of horizontal and vertical flow boiling in a single channel with a confinement number beyond the threshold of micro-scale flow

2021 ◽  
Vol 33 (11) ◽  
pp. 113302
Author(s):  
Sira Saisorn ◽  
Adirek Suriyawong ◽  
Pochai Srithumkhant ◽  
Pakorn Wongpromma ◽  
Somchai Wongwises
Keyword(s):  
Single Channel ◽  
Flow Boiling ◽  
Vertical Flow ◽  
Micro Scale

Flow boiling and convective condensation of hydrocarbons: A state-of-the-art literature review

2021 ◽  
Vol 182 ◽  
pp. 116129
Author(s):  
Tiago Augusto Moreira ◽  
Gabriel Furlan ◽  
Guilherme Henrique de Sena e Oliveira ◽  
Gherhardt Ribatski
Keyword(s):  
Literature Review ◽  
State Of The Art ◽  
Flow Boiling ◽  
Convective Condensation

scholarly journals Measurement of Spindle Thermal Growth on a Machine Intended for Micro/Meso Scale Milling

2010 ◽  
Vol 447-448 ◽  
pp. 55-60 ◽  
Author(s):  
J.B. Saedon ◽  
Sein Leung Soo ◽  
David K. Aspinwall
Keyword(s):  
Control System ◽  
Literature Review ◽  
Injection Moulding ◽  
Micro Milling ◽  
Measuring Systems ◽  
Warm Up ◽  
Micro Scale ◽  
Thermal Growth ◽  
Acceleration And Deceleration ◽  
Meso Scale

Micro milling is gaining ground as the preferred process for the manufacture of micro/meso-scale components in conventional workpiece materials, in particular for miniature moulds and tooling inserts (~ 60HRC), for the plastics injection moulding industry. Following a brief literature review on microscale milling and associated machine tool/tooling developments, experimental results are presented in relation to spindle thermal growth for a compensated/cooled spindle operating at up to 60,000 rpm, designed to accommodate the machining of meso-scale/micro-scale components. The work involved investigation of spindle warm up and cool down rates for speeds ranging from 30,000 - 60,000 rpm and subsequently the evaluation of spindle growth using both non-contact and contact measuring systems. Growth levels of up to 16µm were detected despite active spindle cooling and the incorporation of a standard compensation algorithm within the control system. Modification to spindle acceleration and deceleration rates reduced error levels by up to 50%.

Review: General Issues and Correlations for Predicting Flow Boiling Heat Transfer Coefficients in Micro-Scale Channels

2015 ◽  
Vol 23 (04) ◽  
pp. 1530003 ◽  
Author(s):  
Chang Yong Park
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
Boiling Heat Transfer ◽  
Flow Boiling ◽  
Inertial Force ◽  
Viscous Force ◽  
Vapor Quality ◽  
Micro Scale ◽  
Continuous Decrease ◽  
Flow Boiling Heat Transfer

A review study was performed for basic heat transfer mechanism and quantitative analysis of correlations for flow boiling heat transfer in micro-scale channels. Several criteria for determining threshold diameter for micro-scale channels were discussed and the concept of confinement number was commented. The distinctive feature of flow boiling in micro-scale channels were considered and it was found out that the effect of the heat flux, latent heat, viscous force, surface tension, and inertial force was more significant. Important dimensionless parameters were summarized and it was pointed out that the boiling number, capillary number, and Weber number could be expected to play important roles at flow boiling in micro-scale channels. 17 correlations for flow boiling in micro-scale channels were reviewed in this study, and they were categorized by three types of correlations such as an equivalent Nusselt number correlation, a correlation with superposition of nucleate and convection boiling mechanism, and a flow pattern-based correlation. The predicted values by the correlations were compared with 536 experimental data from four different literatures and a correlation with smallest prediction errors was found. Some correlations showed distinct trends of convection heat transfer coefficient (h) change with respect to the variation of vapor quality. The trends are categorized by three trends such as noticeable increase of h with the increase of vapor quality and significant continuous decrease after dryout point, minor increase and decrease or decrease and increase of h, and gradual and continuous decrease of h with the increase of vapor quality. For each trend of h change, recommendable correlations and their basic equation forms were proposed to compare the prediction results with experimental data or to develop a new correlation by modifying existing correlations.

Flow Boiling in Microscale at High Flowrates

2011 ◽  
Author(s):  
Ali Kos¸ar
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Critical Heat Flux ◽  
Boiling Heat Transfer ◽  
Flow Boiling ◽  
Nucleate Boiling ◽  
High Flow ◽  
High Mass ◽  
Flow Rates ◽  
Micro Scale

Boiling heat transfer is an important heat removal mechanism for cooling applications in micro scale and finds many applications. Many studies were conducted to shed light on boiling heat transfer in microchannels. They were concentrated on saturation boiling at low mass fluxes (G<1000 kg/m2s). With the enhancement in micro pumping capabilities, flow boiling could be performed at higher mass velocities so that high cooling rates (>1000 W/cm2) could be possibly attained. Due to the increasing trend in critical heat flux and suppression of boiling instabilities with increasing mass velocity flow boiling is becoming more and more attractive at higher mass velocities, where subcooled boiling conditions are expected at high mass velocities. With the shift from low to high flow rates, a transition in both boiling heat transfer (saturated boiling heat transfer to subcooling boiling heat transfer) and critical heat flux (dryout type critical heat flux to departure from nucleate boiling critical heat flux) from one mechanism to another is likely to occur. Few experimental studies are present in the literature related to this subject. In this paper, it is aimed at addressing to the lack of information about boiling heat transfer at high flow rates and presenting experimental data and results related to boiling heat transfer and Critical Heat Flux (CHF) at high flowrates. New emerging technologies resulting in local heating such as nano-scale plasmonic applications and near field radiative energy exchange between objects could greatly benefit from boiling heat transfer at high flow rates in micro scale.

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