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Keywords: critical heat flux
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Journal Articles
Article Type: Research-Article
J. Heat Transfer. September 2015, 137(9): 091006.
Paper No: HT-14-1073
Published Online: September 1, 2015
.... 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...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. August 2015, 137(8): 081501.
Paper No: HT-14-1066
Published Online: August 1, 2015
... 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...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. April 2015, 137(4): 041501.
Paper No: HT-13-1375
Published Online: April 1, 2015
... 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...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. October 2014, 136(10): 101502.
Paper No: HT-13-1510
Published Online: July 22, 2014
... 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...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. September 2014, 136(9): 091501.
Paper No: HT-13-1251
Published Online: May 28, 2014
.... 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...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. April 2014, 136(4): 041501.
Paper No: HT-13-1189
Published Online: January 24, 2014
...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...
Includes: Multimedia, Supplementary data
Journal Articles
Article Type: Research-Article
J. Heat Transfer. November 2013, 135(11): 111002.
Paper No: HT-12-1142
Published Online: September 23, 2013
... 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...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. November 2013, 135(11): 111014.
Paper No: HT-12-1330
Published Online: September 23, 2013
... 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...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. October 2013, 135(10): 101009.
Paper No: HT-12-1434
Published Online: September 11, 2013
.... 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...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. September 2013, 135(9): 091302.
Paper No: HT-12-1263
Published Online: July 26, 2013
... 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...
Journal Articles
Article Type: Technical Briefs
J. Heat Transfer. May 2013, 135(5): 054502.
Paper No: HT-12-1193
Published Online: April 9, 2013
... 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...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. February 2013, 135(2): 021502.
Paper No: HT-11-1562
Published Online: January 3, 2013
... 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...
Journal Articles
Article Type: Evaporation, Boiling, and Condensation
J. Heat Transfer. August 2012, 134(8): 081502.
Published Online: June 5, 2012
...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...
Journal Articles
Article Type: Evaporation, Boiling, and Condensation
J. Heat Transfer. July 2012, 134(7): 071504.
Published Online: May 24, 2012
...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...
Journal Articles
Article Type: Technology Review
J. Heat Transfer. February 2012, 134(2): 024001.
Published Online: December 19, 2011
...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...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. January 2012, 134(1): 011504.
Published Online: November 18, 2011
...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...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. May 2011, 133(5): 051503.
Published Online: February 3, 2011
...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...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. March 2011, 133(3): 031004.
Published Online: November 15, 2010
..., 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...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. October 2010, 132(10): 102404.
Published Online: July 29, 2010
...Saeid Vafaei; Dongsheng Wen This work investigates subcooled flow boiling of aqueous based alumina nanofluids in 510 μ m single microchannels with a focus on the effect of nanoparticles on the critical heat flux. The surface temperature distribution along the pipe, the inlet and outlet pressures...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. August 2010, 132(8): 081501.
Published Online: June 9, 2010
...Satish G. Kandlikar Accurate prediction of critical heat flux (CHF) in microchannels and minichannels is of great interest in estimating the safe operational limits of cooling systems employing flow boiling. Scale analysis is applied to identify the relevant forces leading to the CHF condition...