自動車用ヘッドランプ内の自然対流解析 : 第3報,部品表面,特にレンズ表面の結露予測(流体工学,流体機械)

概要

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In the former study, a method called FSI-DM was developed. This FSI-DM is the method of connecting fluid and solid parts using a discontinuous mesh, and the density of the mesh inside the solid and the fluid can be changeable. The temperature results by CFD were within ±7 degrees as compared with the experimental results. In the present study, in order to predict a vapor condensation, the analogy was assumed between heat transfer and vapor transfer in the boundary layer formed on the surface of the parts inside a headlamp and transport equations of velocity, temperature and vapor concentration was analyzed. As the results, after turn on the bulb, the moisture was once emitted from plastic parts to fluid inside the headlamp, and moisture concentration of fluid became rise. In such stage, by cooling down the surface of the lens, the fog on the surface of the lens arose.
一般社団法人日本機械学会の論文
2004-10-25