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새만금 지역의 비산먼지 확산 예측을 위한 CFD 모델 개발
서일환 ( Il-hwan Seo ),이인복 ( In-bok Lee ),홍세운 ( Se-woon Hong ),황현섭 ( Hyun-sup Hwang ) 한국농공학회 2007 한국농공학회 학술대회초록집 Vol.2007 No.-
A computational fluid dynamics (CFD) model was developed to estimate the dispersion of fugitive dust from the reclaimed land of Saemangeum. Field experiment is the ideal method to understand the real aerodynamic phenomenons and mass transfers at the Saemangeun area. However, it is difficult to find out the correlation between weather condition and dust diffusion because it requires multi-pointed high accuracy measurement systems, time and labors. Moreover, the weather condition can not be artificially controlled by the researchers and is always very unstable and unpredictable. To overcome the limitations of field experiment, the CFD technology was used in this study to quantitatively as well as qualitatively analyze the dust dispersion phenomenons according to various weather conditions. To improve the CFD accuracy, our great effort was made on topographic design, mesh structure, particle generation, and computational process using parallel processing technique. Accordingly, the vertical log-profile of the CFD computed dust distribution became very similar with that presented by Gillies et al.(2004). The dust diffusion ranges were also compared to the results of the field experiments, and some results were very acceptable. It showed that the diffusion of the fugitive dust was mainly affected by particle size, wind speed as well as wind direction.
습식공기정화기의 효율적 운용을 위한 강제환기식 돈사의 환기효율성 연구 (1) 돈사의 환기 분석을 위한 CFD 모델 개발
홍세운 ( Hong Se Wooon ),이인복 ( Lee In Bok ),서일환 ( Seo Il Hwan ),황현섭 ( Hwang Hyun Sup ),유재인 ( Ru Jae In ),하태환 ( Ha Tae Hwan ),권경석 ( Kwan Hyung Suk ) 한국농공학회 2007 한국농공학회 학술대회초록집 Vol.2007 No.-
While livestock facilities in Korea have been changed larger and denser, breeding environment has been getting worse and the productivity of domestic animal have been decreased. It would be worse especially In the cold season because of the minimized ventilation rate to save energy cost. Therefore wet air cleaner can be used to enhance the rearing environment by removing noxious gases and dusts. But, it is difficult to analyze the internal air flow and the environmental factors by only field experiment. Therefore, aerodynamic computer simulation was used to upgrade ventilation system including arrangement of the wet air cleaner. To make simulation model accurately and actually, simplified pig models and tracer gas decay method were used. Accuracy of simulation model was enhanced by 4.4 % of errors compared with data of the field experiment. From the verified CFD model, internal ventilation system and its efficiency with wet air cleaner will be analyzed quantitatively as well as qualitatively.
축산악취 확산의 정성적 및 정량적 예측을 위한 공기유동학적 모델 개발 (1) 축산악취 확산 정도 조사 및 이의 영향 요인 규명
이인복 ( Lee In Bok ),홍세운 ( Hong Se Woon ),황현섭 ( Hwang Hyun Sup ),서일환 ( Seo Il Hwan ),유재인 ( Ru Jae In ),하태환 ( Ha Tae Hwan ),권경석 ( Kwan Hyung Suk ) 한국농공학회 2007 한국농공학회 학술대회초록집 Vol.2007 No.-
Odor is one of the major nuisances in the environment. Especially, odor annoyance from livestock production is an increasing problem in communities in many countries. In order to reduce the odor inconvenience and establish good relations between livestock industry and surrounding communities, many studies on the odor dispersion, such as field experiment and diffusion simulation, have been investigated. Especially, CFD being used widely will be effective for aerodynamic analysis with consideration for various wind conditions as well as topographical conditions. Therefore the ultimate objective is to develop the aerodynamic model for predicting qualitative and quantitative diffusion of livestock odor, and in this study, phenomena and factors of livestock odor diffusion were investigated previously.