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가상경계 격자 볼츠만법을 이용한 사각 캐비티 내부 열유동 해석에 관한 전산 해석
정해권(Hae-Kwon Jeong),김래성(Las-Sung Kim),김두현(Doo-Hyun Kim),양희주(Hui-Ju Yang),하만영(Man-Yeong, Ha) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
In this paper, we propose a new approach to implementing Immersed-Boundary in the lattice Boltzmann method. We adapt the Immersed-Boundary to the thermal lattice Boltzmann method using an equilibrium velocity. This model does not have additional external force term when we calculate the collision process and is much easier to be implemented. This model is validated by the numerical simulation of the natural convection and lid-driven flow in a square cavity with a cylinder.
정해권(Hae-Kwon Jeong),하만영(Man-Yeong Ha),김경천(Kyung-Chun Kim),전충환(Chung-Hwan Jeon),최호진(Ho-Jin Choi),주재천(Jae-Chun Joo),문정만(Jeong-Man Mun),황성기(Seong-Ki Hwang) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.11
According to the development of the economy and to the improvement in life quality, it is increased for the desire for the comfortable circumstance in the underground subway station. And recently, an accident, fire, suicide and so on have been risen. An advanced countries have introduced PSD, and they satisfies with the effect of PSD. The optimum design standard to set up PSD have to satisfy the by train wind beyond the maximum static pressure. This paper includes the maximum static pressure what can be applied to the PSD installation design.
비평형 1차 외삽 경계조건을 이용한 격자 볼츠만 법의 수치적 안정성 및 정확도에 관한 연구
정해권(Hae-Kwon Jeong),김래성(Las-Sung Kim),이현구(Hyun-Goo Lee),하만영(Man-Yeong Ha) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
Non-equilibrium first order extrapolation boundary condition proposed by Guo et al. proposed has a good application for complex geometries, a second order accuracy and a treatment on non-slip wall boundary condition easily. However it has a lack of the numerical stability from high Reynolds number. Guo et al. substituted the density value of adjacent nodes for the density of boundary nodes. This procedure causes the numerical instability on the boundary. In this paper, we derived a procedure of density extrapolation and compared to previous results.
초청총설논문 : 제올라이트막과 제올라이트/고분자 복합막의 전망과 도전
정해권 ( Hae Kwon Jeong ) 한국공업화학회 2010 공업화학 Vol.21 No.5
최근 에너지 효율이 높은 공정기술의 수요가 증가하면서 분리막을 이용한 기체분리가 많은 연구자들의 관심을 모으고 있다. 현재 분리막에 의한 기체 분리 시장은 고분자막이 독점하고 있으며 탄화수소와 같은 응축기체 분리시장이 휠씬 큼에도 불구하고 주로 비응축 기체분리에 제한되고 있다. 이는 고분자 재료의 물성에 한계가 있기 때문이다. 제올라이트막이나 제올라이트/고분자 복합막이 제올라이트의 우수한 분리력과 화학적/열적 특성으로 인해 고분자막의 한계를 극복할 수 있는 대안이 될 수 있다. 이번 총설에서는 이러한 기체분리를 위한 제올라이트막과 제올라이트/고분자 복합막에 대해 간략히 소개하고자 한다. Recently membrane-based gas separation has attracted a great deal of research interests due to the growing demands on greener technologies. Current membrane-based gas separation is dominant by polymer membranes and limited mostly to non-condensable gases even though condensable gases such hydrocarbon isomers are much more attractive. This is primarily due to the limitations of polymer materials. Zeolites and their composites with polymer can offer alternative to current polymeric membranes owing to their superior separation and chemical/thermal properties. This review is intended to provide a brief overview on zeolite and zeolite/polymer composite membranes for gas separation applications.
공동주택의 표준건물 설정에 따른 에너지소비량 산정 및 특성분석
정해권(Jung, Hae-Kwon),정영선(Jeong, Young-Sun),허정호(Huh, Jung-Ho) 대한건축학회 2017 대한건축학회논문집 Vol.33 No.9
The purpose of the study was to set up reference buildings based on the apartments design status and the National Statistical data, and to calculate the energy consumption of the reference building by simulation program. In addition, the energy consumption of apartments including the energy consumption by appliances consumption behavior was calculated. We surveyed the design data of 174 apartments which were granted building permission from 2010 to 2014. The energy consumption of the reference building was divided into heating, hot water, lighting and was calculated using the ECO2 simulation program. Home appliances calculated energy consumption by heating, cooling, hot water, cooking, lighting, and white & brown goods. The results show that the total annual energy consumption of reference building is 18,266.8㎾h/y. The composition percentages are 58.4%(10,659.2㎾h/y) for heating, 16.5%(3,018.1㎾h/y) for hot water, 13.1%(2,397.6㎾h/y) for cooking, 7.2%(1,318.7㎾h/y) for lighting, 3.4%(622.4㎾h/y) for home appliances and 1.4%(250.8㎾h/y) for cooling. The annual energy consumption unit of the reference building was estimated as 214.93 ㎾h/㎡·y.