... 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 Here, α is the liquid phase fraction corresponding to the boundary cell of the cylinder...

... = 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...

..., effectively flattening the coolant jet and enlarges the coolant coverage. In Ref. [ 37 ], two antivortex hole geometries were designed with different intersection locations of the main hole and side holes. Both film effectiveness and heat transfer coefficient values were numerically computed and compared...

... 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...

... in context. For this study, measurements of the local heat transfer coefficient through transition region are of primary interest. The data sets for local heat transfer coefficients are described in Tables 1 and 2 . These data are used in examining the variation of the heat transfer coefficient...

...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...

... interstitial heat transfer coefficient of metal foams of different porosities. The authors concluded that the frictional drag and interstitial heat transfer coefficient increased at lower porosities at a given channel hydraulic diameter-based Reynolds number. Lu et al. [ 3 ] were the first ones to use metal...

... 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...

... in a different way at different C/W and G/W . The time- and surface-averaged heat transfer coefficient h / h w ¯ ¯ of the three areas is calculated separately and presented in Fig. 11 . It is observed that h / h w ¯ ¯ at different C/W displays...

...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...

... (mustard, raagi and bajara) was investigated. The effect of fluidizing gas velocity on the heat transfer coefficient in the immersed tube bundles in in-line and staggered arrangement is discussed. The parameters particle diameter, temperature difference between bed and immersed surface were used...

... transfer coefficient in the staggered cylinder banks a simulation of the experimental process, based on a VAT model, is carried out. The only unknown in the simulation is the heat transfer coefficient. By matching the simulation's results to those of the experiment the heat transfer coefficient can...

... 25 05 2012 Experiments were conducted to investigate local heat transfer coefficients and flow characteristics of air flow in a 962  μ m inner diameter stainless steel microtube (minichannel). The effects of heat loss, axial heat conduction and viscous heating were systematically analyzed...

...Ting-Yu Lin; Satish G. Kandlikar The data reduction procedure is the same as that employed in Part I [ 18 ] of this study. The primary result of this work was the determination of friction factor and heat transfer coefficient for air flow of mircotubes of different diameters, materials...

... standard lithography and etching techniques. Pores which separate microscale pin fins are used to generate high capillary suction, while larger microchannels are used to reduce overall flow resistance. The heat transfer coefficient is found to depend on the area coverage of a liquid film with thickness...