... 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...

... by around 18% as compared to neglected fin-thickness that may arise due to altered heat transfer coefficient caused by higher velocity over the extended surface to accommodate finite fin dimension. Finally, pressure drop and Nusselt number are correlated with the governing parameters including fin-thickness...

.... The local results demonstrate an increase in condensate film thickness from a particular angular position, which is influenced by the vapor quality of the flow to the bottom of the pipe. The heat transfer coefficient decreases around the pipe circumference from the top to the bottom of the pipe. The results...

... situations before presenting respective heat transfer coefficients. 01 12 2020 09 08 2021 22 09 2021 boiling inclination merging sliding bubble heat transfer coefficient For catering to high-density heat dissipation needs, boiling heat transfer is the most preferred...

... = diameter of cylindrical fin (mm) h = heat transfer coefficient (W/(m 2 ·K)) h f = height of fin (mm) k f = thermal conductivity (W/(m ·K)) L = length of base plate (mm) L d = characteristic length (mm) L E = length of enclosure (mm) LO* = transverse...

... perspectives on future prospects are finally addressed. Fig. 7 Laterally averaged film cooling effectiveness and heat transfer coefficient for CY and antivortex holes (AV) [ 40 ] Laterally averaged film cooling effectiveness and heat transfer coefficient for CY and antivortex holes (AV) [40...

... on the impingement side. Instead of steady-state values, transient heat flux and corresponding wall temperatures are utilized in a thin foil technique to find out heat transfer coefficient and reference temperature simultaneously. The scope of the present technique is examined through its application to impinging...

... and outlet vapor qualities were fixed at 0.8 and 0.2, respectively. The test tubes had the same outer diameter of 12.7 mm. Results showed that the dimpled and protruded surface tubes enhanced the convection condensation heat transfer and the heat transfer coefficient was 1.4–1.6 times higher than...

... as if the initial length were uniform (Blair [ 5 ] is notable for giving a clear account of the unheated region and reporting it without adjustment; see Sec. 4 .). The local heat transfer coefficient in a flat-plate boundary layer is higher for UHF than for UWT, by the factor of 0.453/0.332 = 1.36 [ 6 ]. While...

...Lin Ye; Cun-liang Liu; Feng Liu; Yu-quan Yang; Hui-ren Zhu The heat transfer coefficient of counterinclined film holes fed by different intake structures on the turbine vane leading edge (LE) model is experimentally investigated in this paper. A semicylinder model is adopted to model the vane...

...Lin Ye; Cun-Liang Liu; Dao-En Zhou; Hui-Ren Zhu The heat transfer coefficient of cylindrical holes fed by varying internal cross-flow channels with different cross-flow Reynolds numbers Re c is experimentally studied on a low-speed flat-plate facility. Three coolant cross flow cases, including...

... heat transfer coefficient electronic cooling The development of efficient heat exchangers is imperative in addressing the challenge of increased levels of heat flux dissipation in high-performance miniature electronic devices. High-porosity metal foams (MFs) have emerged as highly efficient...

... attached to a microscope and an environmental scanning electrical microscope (ESEM). Out-of-plane droplet jumping motion on superhydrophilic region and gravity effect on the droplet motion were examined. Experiment results showed that effective heat transfer coefficients of hybrid superhydrophobic...

.../10407782.2015.1109386 C = chord of cylinder DNS = direct numerical simulation FV = finite volume method G = gap distance GCI = grid convergence index h ¯ = heat transfer coefficient h ¯ * = time-mean heat transfer coefficient h...

...K. S. Kulkarni; U. Madanan; T. W. Simon; R. J. Goldstein If a steady thermal boundary layer is sufficiently thick, wall heat fluxes and associated convective heat transfer coefficients can be directly calculated from measured temperature distributions taken within it using a traversing thermocouple...

...D. Janssen; J. M. Dixon; S. J. Young; F. A. Kulacki Heat transfer coefficients in a set of three symmetrically heated narrow gap channels arranged in line are reported at power densities of 1 kW/cm 3 and wall heat flux of 3–40 W/cm 2 . This configuration emulates an electronics system wherein power...

... Lorenzini. 27 12 2013 18 07 2014 Artificial neural network (ANN) modeling of heat transfer from horizontal tube bundles immersed in gas fluidized bed of large particles (mustard, raagi and bajara) was investigated. The effect of fluidizing gas velocity on the heat transfer coefficient...

... row numbers required in order for flow and thermal conditions to stabilize. Zukauskas and Ulinskas report the relationship between the friction factor and heat transfer coefficient in a bank of staggered cylinders with a finite number of rows, f Z finite and h finite...

... h = heat transfer coefficient, W/m 2  °C k f = thermal conductivity of liquid, W/m  °C k w = thermal conductivity of tube, W/m  °C Kn = Knudsen number, dimensionless L = tube length, m L h,x = local heating length, m Nu = Nusselt number...

.... For laminar flow. The experimental Nu data is seen to be in good agreement with the theoretical value of 4.364 for laminar fully developed flow. The Nu slightly increases with Re due to the increase in developing length. For turbulent flow, the heat transfer coefficient increases significantly with Re...