Controlling boiling incipience is of paramount importance for reliable operation of liquid-cooled microelectronic heat sources during power transients. This study focuses on heat transfer from a simulated multichip module to a falling film. Experiments have been performed to develop an understanding of the influence of surface tension and wetting characteristics on sensible heat transfer and bo...

As is well known, boiling is an effective mode of heat transfer in that high heat flux levels are possible with relatively small temperature differences. Its optimal application requires that the process be adequately understood. A measure of the understanding of any physical event lies in the ability to predict its behavior in terms of the relevant paramem. Despite many years of research the p...

An Agilent Simulated Distillation (SimDis) system is described for characterizing petroleum fractions for quality control and monitoring of refinery feedstocks and products. The system uses a 6890N gas chromatograph (GC) equipped with a high temperature programmable temperature vaporizer (HT PTV) inlet designed specifically for simulated distillation analysis. A SimDis software program that cou...

Dioxane and water form a positive homoazeotrope which has an azeotropic decrease in temperature sufficiently large to effect the complete r emoval, by fractional distillation through an efficient column, of water present as an impurity. The boiling-point-composition diagram, including the composition of the vapor in equilibrium with the boiling liquid, was determined. The normal boiling point o...

It’s believed that the macrolayer plays an important role in nucleate and transition boiling heat transfer at high heat flux. Many experiments have been carried out to support the macrolayer evaporation model, however, little has been conducted in the numerical simulation of boiling heat transfer. In this study, based on the macrolayer evaporation model of Maruyama et al. (1992), a numerical si...

The evolution of fluid chemistry and mineral alteration around a potential waste emplacement tunnel (drift) is evaluated using numerical modeling. The model considers the flow of water, gas, and heat, plus reactions between minerals, CO(2) gas, and aqueous species, and porosity-permeability-capillary pressure coupling for a dual permeability (fractures and matrix) medium. Two possible operating...

An experimental study is presented for droplets containing an alcohol-resistant aqueous film forming foam (AR-AFFF) impacting and boiling on a heated stainless steel surface. Experiments with solutions of 3% (volume fraction) AR-AFFFldistilled water were compared to ones with distilled water and 3% AR-AFFF/simulated seawater. The latter experiments were motivated by the practice of mixing AR-AF...

The purpose of this paper is to report the results of a new model study examining the high temperature nuclear waste disposal concept at Yucca Mountain using MULTIFLUX, an integrated indriftand mountain-scale thermal-hydrologic model. The results show that a large amount of vapor flow into the drift is expected during the period of above-boiling temperatures. This phenomenon makes the emplaceme...

Mixtures of ethylene glycol and water are used in cooling the engines in automotive applications. Heat is transferred essentially under subcooled flow boiling conditions as the mixture flows over the hot surfaces, which are at temperatures well above the local saturation temperature of the mixture. Very little information is available in the literature on the subcooled flow boiling characterist...

basic understanding of the process of coolant heat transfer inside an engine is an indispensable prerequisite to devise an infallible cooling strategy. coolant flow and its heat transfer affect the cooling efficiency, thermal load of heated components, and thermal efficiency of a diesel engine. an efficient approach to studying cooling system for diesel engine is a 3d computational fluid dynami...