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장동순(D.S. Jang),송우영(W.Y. Song),나혜령(H.R. Na),박병수(B.S. Park),이은주(E.J. Lee),김복순(B.S. Kim) 한국전산유체공학회 1995 한국전산유체공학회 학술대회논문집 Vol.1995 No.-
This paper describes computational efforts on the various energy and environmental problems using Patankar's SIMPLE method. The specific problems included in this study are : pollutant and flammable material dispersions in open and confined areas, aerator-induced flow in a lake for DO(dissolved oxygen) concentration, primary clarifier for water and waste water treatment, hood ventilation in workplace, cyclone and LNG combustors and Dow chlorination reactor.<br/> A control-volume based finite-difference method is employed together with the power-law scheme. The pressure-velocity coupling is resolved by the use of the revised version of SIMPLE, says SIMPLER and SIMPLEC. The Reynolds stresses are closed using the standard or the RNG k-ε models. Turbulent reaction is modeled using two fast chemistry methods such as eddy breakup and conserved scalar models. Further, a nonequilibrium model is developed for the application of the chlorination process in the Dow reactor. Other important empirical models and physical insights appeared in this study are presented and discussed in a brief note. The computational method developed in this study is considered, in general, as a viable tool for the design and determination of the optimal condition of various engineering system of interest.
에너지ㆍ環境 諸般 시스템에 관한 수치해석적 연구 (Ⅱ)
장동순(D.S. Jang),박병수(B.S. Park),김복순(B.S. Kim),이은주(E.J. Lee),송우영(W.Y. Song) 한국전산유체공학회 1996 한국전산유체공학회 학술대회논문집 Vol.1996 No.-
This paper describes some computational results of various energy and environmental systems using Patankar's SIMPLE method. The specific topics handled in this study are jet bubbling reactor for flue gas desulfurization, cyclone-type afterburner for incineration, 200m tall stack for 500 MW electric power generation, doubie skin and heat storage systems of building energy saving for the utilization of solar heating, finally turbulent combustion systems with liquid droplet or pulverized coal particle.<br/> A control-volume based finite-difference method with the power-law scheme is employed for discretization. The pressure-velocity coupling is resolved by the use of the revised version of SIMPLE, that is, SIMPLEC. Reynolds stresses are closed using the standard k-ε and RNG k-ε models. Two-phase turbulent combustion of liquid drop or pulverized coal particle is modeled using locally-homogeneous, gas/phase, eddy breakup nodel. However simple approximate models are incorporated for the modeling of the second phase slip and retardation of ignition without consideration of any detailed particle behavior. Some important results are presented and discussed in a brief note. Especially, in order to make uniform exit flow for the jet bubbling reactor, a well-designed structure of distributor is needed. Further, the aspect ratio in the double skin system appears to be one of important factors to give rise to the visible change of the induced air flow rate. The computational tool employed in this study, in general, appears as a viable method for the design of various engineering system of interest.
에너지ㆍ환경 제반 시스템에 관한 수치해석적 연구(Ⅲ) : 싸이클론 전기집진기, 슬래깅 연소로, 연소로 냉간유동, 하이킹 오솔길, 폐수처리 반응조, JBR
장동순(D.S. Jang),박병수(B.S. Park),이은주(E.J. Lee),김복순(B.S. Kim),김영남(Y.N. Kim),김경미(K.M. Kim),김혜숙(H.S. Kim),신미수(M.S. Shin),도희준(H.J. Doh) 한국전산유체공학회 1996 한국전산유체공학회 학술대회논문집 Vol.1996 No.-
A seires of numerical calculations are performed on various energy and environmental systems, which include cyclonic electrostatic precipitator, slagging combustor, cold test furnace, the air movement in a hiking trail, wastewater reactor and jet bubbling reactor for SQx removal. A control-volume based finite-difference method by Patankar is employed together with the SIMPLEC algorithm. The standard two-equation and RNG k-ε turbulence models are implemented for Reynolds stress. Further, a simplified eddy breakup model is incorporated for two-phase coal combustion. Calculated results are presented briefly together with the summary of the important physics of each system.
에너지ㆍ환경 諸般 시스템에 關한 수치 해석식 硏究(Ⅰ) : LPG 확산, 호소 유동, 일차침전소, 국소 환기용 후두, 싸이클론 연소로, Dow 화학 반응로
장동순(D.S. Jang),김경미(K.M. Kim),이은주(E.J. Lee),박병수(B.S. Park),김복순(B.S. Kim) 한국전산유체공학회 1997 한국전산유체공학회지 Vol.2 No.1
This paper describes several computational results on the various energy and environmental problems using Patankar's SIMPLE method. The specific problems included in this study are. pollutant and flammable material (lispersions in open and confined areas, huoyancy-driven now in a lake, primary clarifier for water and waste water treatment. hood ventilation in workplace. cyclone combustor and Dow chlorination reactor.<br/> A control-volume based finite-difference method is employed together with the power-law scheme. The pressure-velocity coupling is resolved by the use of the revised version o[ SIMPLE. says SIMPLER and SIMPLEC. The Reynolds stresses are closed using the standard or RNG k-ε models. A nonequilibrium turbulent reaction model is developed [or the application of the chlorination process in the Dow thermal reactor. Other important empirical models and physical insights appeared this study are presented and discussed in a brief note. The computational method developed in this study is considered. in general as a viable tool for the design and determination of the optimal operating condition of various environmental engineering system of interest.
에너지ㆍ환경 諸般 시스템에 關한 수치 해석식 硏究(Ⅰ) : LPG 확산, 호소 유동, 일차침전소, 국소 환기용 후두, 싸이클론 연소로, Dow 화학 반응로
장동순(D.S. Jang),김경미(K.M. Kim),이은주(E.J. Lee),박병수(B.S. Park),김복순(B.S. Kim) 한국전산유체공학회 1997 한국전산유체공학회지 Vol.2 No.1
This paper describes several computational results on the various energy and environmental problems using Patankar's SIMPLE method. The specific problems included in this study are. pollutant and flammable material (lispersions in open and confined areas, huoyancy-driven now in a lake, primary clarifier for water and waste water treatment. hood ventilation in workplace. cyclone combustor and Dow chlorination reactor.<br/> A control-volume based finite-difference method is employed together with the power-law scheme. The pressure-velocity coupling is resolved by the use of the revised version o[ SIMPLE. says SIMPLER and SIMPLEC. The Reynolds stresses are closed using the standard or RNG k-ε models. A nonequilibrium turbulent reaction model is developed [or the application of the chlorination process in the Dow thermal reactor. Other important empirical models and physical insights appeared this study are presented and discussed in a brief note. The computational method developed in this study is considered. in general as a viable tool for the design and determination of the optimal operating condition of various environmental engineering system of interest.