...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...

... with optimum stacking configuration. Formation of film and release 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...

...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...

... transfer enhancement Micro heat transfer Two-phase flow Boiling Condensation Nanoscale heat transfer Heat transfer High-temperature, high heat flux thermal management is becoming the key issue for developing high power density, high-performance electronic devices and energy systems. Among...

... 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...

..., filmwise condensation behaviors are observed on both superhydrophilic and bare microporous surfaces due to the wicking into the pores. Bubbles Evaporation Experimental techniques Heat and mass transfer Heat transfer enhancement Micro heat transfer Two-phase flow Particles Droplets Boiling...

...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...

... transfer Thermophysical properties Boiling Condensation Boiling Condensation Supercritical fluid (SCF) is a substance normally associated with high temperature and pressure. SCF exists at temperature and pressure above its critical point wherein no distinction exists between liquid and gas...

...; published online May 25, 2018. Assoc. Editor: Amitabh Narain. 15 05 2017 12 04 2018 Evaporation Heat exchangers Heat transfer enhancement Boiling Condensation Shell and tube condenser might be the most common types of heat exchangers used in the refrigeration and air...

... 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...

... and Slender Pillars ,” Langmuir , 20 (19), pp. 8209 – 8213 . 10.1021/la048629t [7] Patankar , N. A. , 2010 , “ Supernucleating Surfaces for Nucleate Boiling and Dropwise Condensation Heat Transfer ,” Soft Matter , 6 (8), pp. 1613 – 1620 . 10.1039/b923967g [8] Kim , S. , and Kim...

... Mass Transfer , 26 ( 5 ), pp. 747 – 760 . 10.1016/0017-9310(83)90026-1 [7] Patankar , N. A. , 2010 , “ Supernucleating Surfaces for Nucleate Boiling and Dropwise Condensation Heat Transfer ,” Soft Matter , 6 ( 8 ), pp. 1613 – 1620 . 10.1039/b923967g [8] Kim , S. , and Kim...

...M. Enrique Huerta L; Tania M. Flores F; Claudia Barraza de la P; A. Humberto Castillejos E Heat extraction and drop impact regimes occurring when a local portion of a horizontal flat-fan air mist impinges the active surface of a Pt disk hold at T w from ∼60 to 1200 °C are investigated. Boiling...