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In vector radiative transfer, backward ray tracing is seldom used. We present a backward and forward Monte Carlo method to simulate vector radiative transfer in a two-dimensional graded index medium, which is new and different from the conventional Monte Carlo method. The backward and forward Monte Carlo method involves dividing the ray tracing into two processes backward tracing and forward tracing...
A method has been developed for analyzing 2-D solid-liquid phase change melting process in the condition of gravity and natural convection. The method solves the phase change problems by the enthalpy method coming from computational fluid dynamics (CFD) software (Fluent 6.2). Solid-liquid interface positions, temperature distributions and speed vector distributions are obtained in separately time...
The latent heat storage unit (LHSU) using phase change material (PCM) is a quite attractive passive thermal management technique. Graphite foam-PCMs composite are very useful especially in electronics cooling system for power system applications due to their high energy to weight ratio and thermal response rate. A numerical study is proposed to investigate and predict the thermal behavior and performance...
An analysis and design trade study was conducted to compare different solar dynamic power systems(SDPS) for space missions application. Closed Brayton Cycle(CBC), alkali-metal Rankine Cycle(RC), free-piston Stirling Cycle(SC) and cogeneration cycles were evaluated and also compared with each other. Conceptual designs were developed for cogeneration cycles of CBC combining with Organic RC or new two-phase...
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