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박희용,두민수,Pak, Hi-Yong,Doo, Min-Soo 대한설비공학회 1985 설비저널 Vol.14 No.2
In this study, a numerical analysis was performed for the natural convection heat transfer in a vertical channel which was consisted of two finite-thickness vertical walls with heat source. The ratio of the thermal conductivity of wall to air played an important role in the analysis. The case for which one side wall has protrusion resistances was also examined. The governing equations for the system was discretized by control volume formulation and solved by SIMPLE method. As the result of this study, it was found that the uniform heat flux boundary condition could be applied when the conductivity ratio was below approximately 50 and the uniform temperature boundary condition could be used when the conductivity rat io was over approximately 15,000. However, when the conductivity ratio was between 50 and 15,000, the thermal conductivity ratio value should be considered for the analysis. It was also found that the existence of protrusion resistance influenced the thermal field up to the distance of 3-4 times of the protrusion length.
신현정(Hyun-Jung Shin),조성호(Sung-Ho Cho),이상권(Sang-Kwon Lee),두민수(Min-Soo Doo) 한국자동차공학회 1994 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Studying with various kinds of sensing methods in order to develop excellent performance height sensor needed for Electronic Control Suspension (ECS), We have decided non-contact height sensor using magnetic device such as Hall effect and Magnetostrictive etc.. Test results is presented which comes from computer simulation for electronic and magnetic circuit to get basic performance factors of sensor.<br/> With simulation results. We have set up the proto sample. Results of performance test on automotive also have been shown in this paper.<br/>