...Zihao Zheng; Xiaohui Bai; Akira Nakayama The Graetz problem in a transpiration-cooled channel was analytically attacked so as to explore the developing temperature field due to a sudden change in wall temperature of the channel subject to an arbitrary distribution of the local mass flux over...

...Ajit K. Sahoo; Ashok K. Barik; Prafulla K. Swain Different designs of novel coolant (i.e., water) circuits have been proposed using a well-established constructal law to cool a square substrate made up of aluminum oxide and subjected to a uniform wall heat flux (i.e., q ″ = 200 W/m 2 ) at its top...

...Volkan Kirmaci In this study, heating and cooling performances of two vortex tubes connected in parallel using different working fluids were compared. In experimental studies, oxygen, nitrogen, and air were used as working fluids in counterflow Ranque–Hilsch vortex tube (RHVT) and performance...

... boundary conditions are applied Cooling fluid/bottom condenser surface (22) λ s ∂ T ∂ n = h ( T - T ∞ ) Heater/top evaporator surface (23) λ s ∂ T ∂ n = q " All other surrounding walls are assumed adiabatic (24) ∂ T...

... aisle arrangement of racks cooled by one CRAC unit. While the thermal data throughout the facility can be collected in about 30 min using a 3D temperature mapping tool, the POD method is able to generate temperature field throughout the data center in less than 2 s on a high end desktop personal...

... limited by the low thermal conductivity of foods and increasing heating and cooling rates is critical in maximizing product quality. This paper briefly reviews the heat transfer problems found in food processing, with particular reference to the modeling of heating to ensure safety, problems found...

...Allan D. Kraus The forced cooled electronic chassis is revisited and, because of recent developments, changes which amend the design procedure are proposed. These considerations involve the thickness of the cover and splitter plates dictated by the Murray–Gardner assumptions, the impact of the so...

... military engines. To ensure the turbine airfoil component integrity operated under such a condition, advanced cooling capacity by both external and internal means was necessary to remove the excessive heat load from the turbine airfoil. This paper discusses state-of-the-art airfoil cooling technologies...

... the heating period, and associated with the existence of a large temperature hysteresis in a heating and cooling cycle. Experimental measurement also shows that over 12% of the liquid by volume is lost without being phase changed, due to high-speed vapor flow induced liquid splash. Liquid splash...

... temperature, temperature distribution, and cooling power using only inlet gas properties as input variables. To achieve this, the model incorporated gas equations of state to account for changing gas properties due to heat transfer within the heat exchanger and expansion within the capillary. In consideration...

...Markus Schwänen; Andrew Duggleby Internal cooling of the trailing edge region in a gas turbine blade is typically achieved with an array of pin fins. In order to better understand the effectiveness of this configuration, high performance computations are performed on cylindrical pin fins...

...Tailian Chen; Suresh V. Garimella The cooling capacity of two-phase transport in microchannels is limited by the occurrence of critical heat flux (CHF). Due to the nature of the phenomenon, it is challenging to obtain reliable CHF data without causing damage to the device under test. In this work...

...T. S. Dhanasekaran; Ting Wang Film cooling techniques have been successfully applied to gas turbine blades to protect them from the hot flue gas. However, a continuous demand of increasing the turbine inlet temperature to raise the efficiency of the turbine requires continuous improvement in film...

...Myeongsub Kim; Minami Yoda Cooling microelectronics with heat flux values of hundreds of kW/cm 2 over hot spots with typical dimensions well below 1 mm will require new single- and two-phase thermal management technologies with micron-scale addressability. However, experimental studies of thermal...

...Zhongxuan Du; Wensheng Lin; Anzhong Gu Cooling of supercritical CH 4 /N 2 mixture is the most important heat transfer process during coalbed methane (CBM) liquefaction. In this paper, numerical studies of the turbulent convective heat transfer of supercritical CH 4 /N 2 flowing inside a vertical...

.... However, system lifetime has a weak relationship with optical thickness. 06 04 2010 15 05 2011 31 08 2011 31 08 2011 automotive components cooling drops evaporation flow simulation heat radiation two-phase flow liquid droplet radiator combined radiation-evaporation...

... are discretized by using the finite volume method. The algebraic system equations deduced from this discretization are solved with the Thomas and Gauss algorithms. Results show that the evaporative cooling of the wetted wall and the air flow through the tube can be produced by low heat flux applied to the tube...

...  = 150 mm) for the present study. The chamber and the sample, as a whole, operate in a manner analogous to a thermosyphon. Liquid evaporated off the wick surface is condensed on the chamber walls, returns to the reservoir by gravity, and flows back to the evaporator wick. Cooling water from a thermal...

... thermal conductivity. Unfortunately, a heat pipe integrated with cooling fin in the adiabatic section has changed its original heat transfer property. The integrated cooling fin in the adiabatic section has in advance taken heat of the vapor away and caused the vapor to be condensed in the adiabatic...

... of the dimensionless Debye-Huckel parameter is accompanied by a higher Nusselt number for wall cooling, whereas the opposite is true for wall heating case. Although to increase the dimensionless Joule heating term is to decrease Nusselt number for both pseudoplastic and dilatant fluids, nevertheless its effect...