...Lingnan Lin; Mark A. Kedzierski Recent studies report an anomalous phenomenon, particularly for small diameter microfin tubes, where the flow boiling heat transfer coefficient decreases with increasing mass velocity in the convective regime, which is contrary to that found for smooth tubes...

... in the aforementioned applications. The analyzed polymer microgap features a dedicated vapor pathway design which is proven to assist in the efficient removal of vapor from the microsystem. The dielectric refrigerant HFE-7100 is used as the working fluid under flow boiling conditions, reporting on the two-phase flow...

...Zhenlin Zhou; Shuang Wang; Jing He; Hanbing Ke; Mei Lin; Qiuwang Wang Two-phase flow boiling is the preferred method for efficient heat dissipation in electronic equipment, so the bubble dynamics and heat transfer characteristics of flow boiling in a single pentagonal rib channel are numerically...

...Anwarul Karim; Yoon Jo Kim; Jong-Hoon Kim As technology becomes increasingly miniaturized, thermal management becomes challenging to keep devices away from overheating due to extremely localized heat dissipation. Two-phase cooling or flow boiling in microspaces utilizes the highly efficient thermal...

...Wei Li; Junye Li; Kan Zhou; Hua Zhu; Zhengjiang Zhang; Jincai Du In this short paper, the method of analyzing microchannel flow boiling phenomena by the image processing tool was briefly introduced. The experiments of subcooled and saturated flow boiling on various micro-/nanostructured modified...

... 16 05 2020 28 10 2020 18 01 2021 flow boiling two-phase flow instabilities symmetry breakdown pressure drop oscillations stability analysis The flow boiling instabilities are observed in many systems, from the low-pressure space nuclear reactor to thermal power plants...

... with a width of 1 mm, a height of 5.5 mm, and a pitch of 1 mm and has a Z-type inlet/outlet arrangement. Nine separate heaters offer thermal load to the heat sink in order to provide a uniform or nonuniform heat flux. The flow boiling process is captured by a high-speed camera. The temperatures of the heaters...

.... Flow boiling visualization experiments were carried out by high-speed camera in triangular groove-wall and plain-wall microchannels at mass fluxes of 148–490 kg/m 2 ·s and inlet temperatures of 42 °C and 60 °C. The boiling curve, heat transfer coefficient (HTC), pressure drop, and two-phase flow...

...S. R. Darr; J. W. Hartwig; J. Dong; H. Wang; A. K. Majumdar; A. C. LeClair; J. N. Chung Recently, two-phase cryogenic flow boiling data in liquid nitrogen (LN 2 ) and liquid hydrogen (LH 2 ) were compared to the most popular two-phase correlations, as well as correlations used in two of the most...

... at the liquid-vapor interface, and T w is the wall temperature. 31 05 2017 16 02 2018 07 06 2018 e-mail:  j.f.dunne@sussex.ac.uk flow boiling IC engines CFD large eddy simulation Reynolds averaged Navier–Stokes Predicting the heat transfer levels that occur...

... significant increases because of the presence of flow boiling. Reynolds numbers range from 250 to 1200, Weber numbers from 2 to 14, and boiling numbers from O(10 −4 ) to O(10 −3 ). Exit quality can reach 30% in some cases. Overall heat transfer coefficients of 40 kW/m 2 K are obtained. Pressure drops for both...

... 01 2014 04 10 2014 11 11 2014 The preferable cooling solution for micro-electronic systems could be forced flow boiling in micro heat exchangers. Nanoparticle deposition affects nucleate boiling via alteration of surface roughness, capillary wicking, wettability, and nucleation site...

... [4] Kandlikar , S. G. , 2002 , “ Fundamental Issues Related to Flow Boiling in Minichannels and Microtubes ,” Exp. Therm. Fluid Sci. , 26 ( 2-4 ), pp. 389 – 407 . 10.1016/S0894-1777(02)00150-4 [5] Lin , L. , 1998 , “ Microscale Thermal Bubble Formation: Thermophysical Phenomena...

.... Assoc. Editor: Giulio Lorenzini. 20 06 2013 24 01 2014 Formation of the first bubble at nucleation site is an inception of the two phase flow in pool boiling and flow boiling. Bubble dynamics (bubble nucleation, growth, and departure) plays an important role in heat transfer...

.... 16 05 2013 10 12 2013 Boiling can provide several orders of magnitude higher performance than a traditional air cooled system in electronics cooling applications. It can dissipate large quantities of heat while maintaining a low surface temperature difference. Flow boiling...

... coefficient varied strongly with the position. The average heat transfer coefficient both in the bend and downstream area was higher than that in an equivalent horizontal straight tube. Meng and Peng [ 12 ] carried out a series of experiments on the flow boiling of R141b in U-tubes. They found...

.... Editor: Sushanta K. Mitra. A variety of predictive correlations for critical heat flux (CHF) are examined in light of the growing body of work exploring enhanced flow boiling CHF via cross-sectional expansion. The analysis considers the effect of a small perturbation of the diameter of a circular...

... with a focus on the future research needs. After providing a brief introduction, the paper addresses six topics related to transport phenomena in microchannels: single-phase gas flow, enhancement in single-phase liquid flow and flow boiling, flow boiling instability, condensation, electronics cooling...

... online June 27, 2013. Assoc. Editor: Srinivas Garimella. 03 09 2011 14 02 2013 This paper presents the visualization results obtained for an experimental study of R134a during flow boiling in a horizontal microchannel. The microchannel used was a fused silica tube having an internal...

.... , 2007 , “High Performance and Subambient Silicon Microchannel Cooling,” ASME J. Heat Trans. , 129 ( 8 ), pp. 1046 – 1051 . 10.1115/1.2724850 [3] Qu , W. , and Mudawar , I. , 2003 , “Flow Boiling Heat Transfer in Two-Phase Micro-Channel Heat Sinks—II. Annular Two-Phase Flow Model...