... – 375 . 10.1007/s11705-018-1703-1 [2] Seo , S. B. , and Bang , I. C. , 2019 , “ Acoustic Analysis on the Dynamic Motion of Vapor-Liquid Interface for the Identification of Boiling Regime and Critical Heat Flux ,” Int. J. Heat Mass Transfer , 131 , pp. 1138 – 1146 . 10.1016...

...Anatoly Parahovnik; Esther White; Yoav Peles Flow boiling heat transfer around the critical heat flux (CHF) condition at high reduced pressures of carbon dioxide in a 296-μm hydraulic diameter microchannel was experimentally studied. The CHF conditions for developing flow and fully developed flow...

.... Microstructured surfaces, which are mainly used for cutting tools, were developed with diamond particles using electrodeposition technique. Four different particle diameters were prepared: 5, 10, 15, and a mixture of 5 and 1.5 μ m. The critical heat flux (CHF) for diamond particle surfaces showed 27–30 W/cm 2...

... in saturated conditions at atmospheric pressure and under increasing heat flux. The surface enhanced by the epoxy-based microporous coatings significantly augmented both nucleate boiling heat transfer coefficients and critical heat flux (CHF) of R-123 relative to those of a plain surface. However, for water...

... manuscript received December 13, 2014; published online January 13, 2015. Assoc. Editor: Cila Herman. 26 07 2013 13 12 2014 13 01 2015 Pool boiling experiments are performed to investigate potential enhancement of critical heat flux (CHF) of PF-5060 dielectric liquid on microporous...

... of saturated HFC-245fa. The effect of saturation temperature/pressure and a microporous-enhanced surface on thermal performance was evaluated. The major findings from this study are provided below. Nomenclature CHF = critical heat flux (kW/m 2 ) C p = specific heat capacity (kJ/kg·K) g...

.... Tao. 20 05 2013 04 04 2014 A critical heat flux (CHF) correlation is developed for jet impingement boiling of a single round jet on a flat circular surface. The correlation is valid for submerged jets as well as for free surface jets with Reynolds numbers (Re) between 4000...

...J. Jung; S. J. Kim; J. Kim pool boiling critical heat flux IR thermometry The high heat flux capability of phase change heat transfer results from heat removal by latent heat and increased single-phase heat transfer by local agitation of the fluid as bubbles depart the surface. CHF...

... the wall surface below 85 °C at 33 kPa. Flammability, toxicity, and temperature overshoot issues need to be addressed before practical implementation of ethanol-based cooling systems can occur. pool boiling heat transfer enhancement open microchannels critical heat flux subatmospheric pressure...

... correlation Greek Symbols μ = viscosity, Pa s ρ = density, kg/m 3 σ = surface tension, N/m Nomenclature CHF = critical heat flux, W/cm 2 h = heat transfer coefficient, W m −2 K −1 h lv = latent heat, J/kg P = pressure, MPa q...

.... 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...

... was similarly tested, and due to boric acid deposition, the BHT degraded and the critical heat flux (CHF) enhanced relative to pure water. Also, the possibility of transient pool boiling behavior of borated water was investigated but none was detected. With pressure and orientation variation, the nanoporous...

... nanosheets (GONs). Extremely dilute suspensions with only 0.0001% and 0.0002% (in mass fraction) of GONs were studied and their critical heat fluxes (CHF) during quenching were determined to increase markedly by 13.2% and 25.0%, respectively, as compared to that of pure water. Such efficient CHF enhancement...

... temperatures of 23 and 35 °C, and saturation pressures of 10 and 45 kPa. The effects of the orifices on two-phase pressure drop, critical heat flux (CHF), and flow boiling heat transfer coefficient are studied. The results show that the pressure drop caused by the orifice takes a considerable portion...

...Ruander Cardenas; Vinod Narayanan Critical heat flux (CHF) characteristics in submerged jet impingement boiling of water on a heated copper surface are investigated at subatmospheric conditions. Data are reported at a fixed surface-to-nozzle diameter ratio of 23.8 and a fixed surface-to-nozzle...

...Ho Seon Ahn; Joonwon Kim; Moo Hwan Kim Dynamic wetting behaviors of water droplet on the modified surface were investigated experimentally. Dynamic contact angles were measured as a characterization method to explain the extraordinary pool boiling critical heat flux (CHF) enhancement...

...Ho Seon Ahn; Moo Hwan Kim Recently, there has been increasing interest in boiling nanofluids and their applications. Among the many articles that have been published, the critical heat flux (CHF) of nanofluids has drawn special attention because of its dramatic enhancement. This article includes...

...Tailian Chen; Suresh V. Garimella The cooling capacity of two-phase transport in microchannels is limited by the occurrence of critical heat flux (CHF). Due to the nature of the phenomenon, it is challenging to obtain reliable CHF data without causing damage to the device under test. In this work...

...Saptarshi Basu; Sidy Ndao; Gregory J. Michna; Yoav Peles; Michael K. Jensen A detailed experimental study was carried out on the critical heat flux (CHF) condition for flow boiling of R134a in single circular microtubes. The test sections had inner diameters (ID) of 0.50 mm, 0.96 mm, and 1.60 mm...

..., that the millimeter scale bead packed porous structures could greatly influence pool boiling heat transfer by forcing a single bubble to depart at a smaller size, as compared with that in a plain surface situation at low heat flux situations, and could trigger the earlier occurrence of critical heat flux by trapping...