... the smooth tube using PVD techniques. This article specifically examines the pool and flow boiling HT phenomena of distilled water over a 2 × 3 tube bundle (TB) coated with DLC and is compared with respect to a conventional smooth TB. The experimental wall superheat and heat transfer coefficients (HTC...

...Winston O. James, III; I. Perez-Raya The present work demonstrates the use of customized ansys - fluent in performing 3D numerical simulations of nucleate boiling with a sharp interface and adaptive mesh refinement. The developed simulation approach is a reliable and effective tool to investigate...

...M. A. Kedzierski; L. Lin This paper presents a simple correlation containing nine dimensionless parameters to predict the local convective boiling heat transfer within a microfin tube that was developed from a dataset that included a wide range of refrigerants, flow conditions, and hydraulic...

...Avik Saha; Arup Kumar Das Pool boiling around a heated cylinder having a diameter larger than the departure diameter of bubbles has been simulated numerically. Thermally uniform heat flux condition has been maintained at the outer surface of the cylinder, submerged at saturated water at atmospheric...

...Prasanna Jayaramu; Shashwat Jain; Sateesh Gedupudi; Sarit K. Das Heat sinks and heat exchangers based on flow boiling in mini/microchannels are expected to be more compact and efficient. One of the major challenges while using copper material for phase-change heat transfer application is the change...

...M. A. Kedzierski; L. Lin This paper quantifies the pool boiling performance of R514A, R1224 yd(Z), and R1336mzz(E) on a flattened, horizontal Turbo-ESP surface for air-conditioning applications for heat fluxes between roughly 10 kWm −2 and 100 kWm −2 . R514A, R1224 yd(Z), and R1336mzz(E...

... transfer model for saturated two-phase flow boiling of refrigerant and nanolubricants was also developed by integrating the modified forced flow convective heat transfer model and a semi-empirical pool boiling model for nanolubricants. The new model included the several physical effects that influenced...

... in terms of periodic bubble along with liquid replenishment has been seen as the mechanisms of the boiling around heated cylinders. c = specific heat, kJ/kg K C = color index D = diameter of heated cylinder, mm H = smoothing length parameter h fg = latent heat...

...Vinod Pandey; Gautam Biswas; Amaresh Dalal; Samuel W. J. Welch Heterogeneous nucleate boiling over a flat surface has been studied through complete numerical simulations. During the growth and departure of the vapor bubble, the interface is tracked following a coupled level-set and volume of fluid...

...Wei Li; Yang Luo; Jingzhi Zhang; W. J. Minkowycz This paper presents fundamental research on the hydrodynamics and heat transfer surrounding a single elongated bubble during flow boiling in a circular microchannel. A continuum surface force (CSF) model based on the volume of fluid (VOF) method...

...( a ) and 13( b ) to show the nanowire size effect. As shown in Table 1 , the nanowire diameters and heights increase together. Unlike the results in pool boiling experiments where the nanotube height had little effect on the nucleate boiling heat flux [ 29 ], the nanowire size (height) does affect the spray...

... Experimental techniques Heat and mass transfer Heat exchangers Micro heat transfer Thermal systems Two-phase flow Particles Droplets Boiling Condensation Nanoscale heat transfer Heat transfer Flow regimes, condensation, evaporation, and related two-phase flow phenomena in a single...

... Micro heat transfer Two-phase flow Particles Droplets Boiling Condensation Nanoscale heat transfer Heat transfer Journal of Heat Transfer AUGUST 2018, Vol. 140 / 080903-1...

...Seongchul Jun; Jin Sub Kim; Jungho Lee; Seung M. You The hydrophobic, Teflon-coated surfaces on plain copper and Cu-HTCMC (High temperature Thermally Conductive Microporous Coating) compared on pool boiling heat transfer of water. The HTCMC was created by sintering of copper powders...

... Nuclear heat transfer Thermophysical properties Boiling Condensation Boiling Condensation 04 08 2017 22 03 2018 Contributed by the Heat Transfer Division of ASME for publication in the J OURNAL OF H EAT T RANSFER . Manuscript received August 4, 2017; final manuscript received...

.... , Numata , M. , He , Y.-L. , and Tao , W.-Q. , 2015 , “ Nucleate Pool Boiling and Filmwise Condensation Heat Transfer of R134a on the Same Horizontal Tubes ,” Int. J. Heat Mass Transfer , 86 , pp. 744 – 754 . 10.1016/j.ijheatmasstransfer.2015.02.020 [6] Zhang , D. C. , Ji , W. T...

... on heat exchanger surfaces. The implications regarding wickability effects on pool boiling processes are also discussed. References [1] Li , C. , Wang , Z. , Wang , P. I. , Peles , Y. , Koratkar , N. , and Peterson , G. P. , 2008 , “ Nanostructured Copper Interfaces...

...Huayong Zhao; Colin P. Garner This paper presents corrections for existing hydrodynamic instability-based critical heat flux (CHF) models in pool boiling by taking into account the effect of the viscosity, geometry and size of the liquid–vapor interface. Based on the existing literature, the Kelvin...

...Hyun Jin Kim; Leon Liebenberg; Anthony M. Jacobi Heat transfer and pressure drop characteristics of R-134a boiling in a chevron-patterned brazed plate heat exchanger (BPHE) are studied experimentally. With corrugated BPHE channels having hydraulic diameter of 3.4 mm and low refrigerant mass flux...

... December 6, 2017; published online April 6, 2018. Assoc. Editor: Gennady Ziskind. 28 04 2017 06 12 2017 Evaporation Micro heat transfer Porous media Boiling Condensation Nanoscale heat transfer Dropwise condensation on textured nonwetting surfaces has vast applications...