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The gasification progress which was coupled between heat transfer and fluid-flow on rib-tube of Open Rack Vaporizer (ORV) was studied in this paper. Based on theoretical analysis and experiment, the k ε − model and wall-function were chose to simulate the flow field of rib-tube, and the multiphase flow was described by the mixture model, in which the dispersed phase was defined by different velocity. In addition, self-defining functions were used and governing equations were set up to solve the dispersed phase, and the results were compared with the experiment. The process of fluid-flow and heat exchange on rib-tube was simulated, and the contours of temperature, pressure, velocity, gas fraction were obtained, which showed that, the parameters of above changed when the temperature rises and the LNG evaporate along the rib-tube, and a mixed process existed in the middle of the heat tube.

This paper presents the thermal management of an automatic teller machine (ATM) using ICEPAK. Four different design variations were investigated to determine the effects of an additional intake fan, orientation of the components, etc. on the air circulation and temperatures of parts within the electronic system. Comparison of the simulated results from a numerical model with experimental measurements indicated that the temperature deviations are within a 10% range. The numerical analysis was used to improve the ATM design. The results indicated that better thermal performance and air circulation within the ATM can be achieved by installing an ATM exhaust fan, re-orientating the ATM power supply unit, and removing problematic areas where flow re-circulation occurred within the computer assembly.