... to the definition 18 , whose denominator includes the fin efficiency (lower in wet conditions). Wavy fins in wet conditions at ϕ i = 85 % and u f = 4 m ∕ s : ( a ) temperature distribution and ( b ) mass flow rate of vapor condensing per unit area of the fin surface...

...Z. G. Qu; W. Q. Tao; Y. L. He In this paper, a numerical investigation of air side performance of strip fin surface is presented. Three-dimensional numerical computation was made for a model of a two-row finned tube heat exchanger. The tube configuration is simulated with step-wise approximation...

... has also been discussed. heat transfer mass transfer temperature distribution optimisation Analytical Dehumidification Finned Surfaces Heat Exchangers Optimization Extended surfaces or fins are commonly used on the gas side of the heat exchangers to enhance the rate of heat...

... Condensation Enhancement Finned Surfaces Heat Transfer Efforts have been deployed in recent years toward designing heat exchangers that simultaneously meet the requirements of energy saving, size reduction and subsequent cost reduction. This has led to an extensive use of heat transfer augmentation...

.... Ligrani. 24 July 2003 04 February 2004 16 06 2004 heat exchangers nickel micromachining gas turbines heating friction cooling electroplating LIGA temperature control channel flow Cooling Finned Surfaces Heat Transfer Heat Exchangers Microstructures...

... . 5) The temperature of the boiling liquid is uniform. 6) The heat transfer coefficient h at any point on the nonisothermal fin surface is the same as it would be obtained if the surface surrounding the point was at the same temperature (“local assumption,” Haley and Westwater 2...

...M. Alarco´n; F. Alhama; C. F. González-Fernández classical mechanics mechanical properties Finned Surfaces Heat Transfer After a study of the conceptual and application characteristics of currently used extended surfaces indicators, in a general analysis of fin...

... f = value at fin surface o = value at cylinder surface p = permeable fin s = solid fin ∞ = free stream value Vafai , K. , and Huang , P. C. , 1994 , “ Analysis of Heat Transfer Regulation and Modification Employing Intermittently Emplaced...

... March 2001 05 November 2002 17 07 2003 Bundles Condensation Enhancement Finned Surfaces Refrigeration In accordance with the international regulation on HCFCs (hydrochlorofluorocarbons), a number of zeotropic mixtures of HFC (hydrofluorocarbons) have been developed...

... 2003 natural convection laminar flow finite volume methods confined flow vortices Cavities Finned Surfaces Heat Transfer Natural Convection Vortex Buoyancy-driven convection in a sealed cavity with vertical sides that are cooled and heated is a prototype of many industrial...

... that the fin efficiency can be taken into account only by an additional, internal iterative scheme. In the modified techniques, the issue of experimental uncertainty is not addressed at all. For these reasons the unified method has been suggested. Convection Data Analysis Energy Finned Surfaces...

...-shaped ribs, and a 90 deg channel orientation produces greater rotating effect on heat transfer than a 135 deg orientation. Enhancement Finned Surfaces Heat Transfer Rotating Turbines To achieve high thermal efficiency in a gas turbine engine, the turbine inlet gas temperature should...

... laminar flow boundary layers vortices external flows Computational Finned Surfaces Heat Transfer Natural Convection Laminar convection from a heated cylinder is an important problem in heat transfer. It is used to simulate a wide range of engineering applications as well as provide...

... , and perimeter P , as shown in Fig. 1 . The fin surface loses heat by a combination of convection and radiation mechanisms. Both convective heat transfer coefficient h a and the ambient temperature T a are assumed uniform. These conditions may not necessarily hold in all cases...

... applications. Besides being a simple benchmark geometry for study of complex flow phenomena, a cavity system can simulate a lubricating groove between sliding plates or approximate the separated flow in a surface cavity with an external stream flowing over it. Cavities Convection Finned Surfaces...

... , and the nondimensional baffle height H = 0 , 0.25 , 0.75 , 1.5 , 3 . The baffles were distributed equally around the cylinder perimeter with the first baffle located at θ = 0 , Fig. 1 . Computational Finite Difference Finned Surfaces Heat Transfer Laminar Mixed...

... received May 23, 2002. Associate Editor: B. T. F. Chung. 20 December 2001 23 May 2002 11 09 2002 optimisation space vehicles heat radiation integro-differential equations Finned Surfaces Heat Transfer Radiation Radiating extended surfaces are widely used...

... for publication in the JOURNAL OF HEAT TRANSFER . Manuscript received by the Heat Transfer Division August 21, 2000; revision received April 5, 2002. Associate Editor: T. Y. Chu. 21 August 2000 05 April 2002 11 09 2002 Condensation Enhancement Finned Surfaces Refrigeration Tubes...

... − T w . To compare his model to experimental results, Rose used various finned tubes with different pitches, heights and diameters as well as various fluids (water, ethylene glycol, methanol, R113, R11, R12…). Bundles Condensation Finned Surfaces Zeotropic Mixture Horizontal...

... such as fin surface mounted with VGs, its back surface (mounted without VGs) and flat tube surface are considered. The mass transfer experiments are performed using naphthalene sublimation method. The effects of the fin spacing and VG parameters such as height and attack angle on heat transfer and pressure...