분진 유동 정화를 위한 다공매질체 주위 유동 해석
Numerical Analysis for Airflow through Porous Media for Purification of Particulate Flow
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
최근 황사, 차량 배기가스, 특히 화산재 등에 따른 미세먼지 등으로 인해 발생하는 대기 오염에 대한 우려로 저감 설비에 대한 사회적 관심이 증가하고 있다. 이에 본 논문에서는 화산재 등과 같은 입자성 유동에 대한 공기정화 설비에 많이 활용되는 다공판이나 다공매질을 통과하는 유동 특성 분석을 위한 전산해석을 다루었다. 실제 다공판이나 다공매질의 경우 공극이 작을 때는 전산해석에 많은 어려움이 있어 경험적 모형이 활용되는 추세인데, 경험적 모형에 포함된 경험계수의 산정 방법과 결과를 실제 다공영역에 대한 전산 모형을 활용하거나 실험에 의한 압력강하 계측 결과와 비교함으로써 효과적인 전산해석 방법을 제시하고자 하였다.
Abstract
Particulate flow and related mitigation measures have been of recent public interest because of increased occurrence of yellow dust and potential threat of volcanic ash around Korea. This paper presents computational method to analyze the flow around or through apparatus using porous media to purify particulate airflow. In general, computational modeling for porous media is very difficult task due to complexity and geometrical scale incurred by tiny pores in the filtering mechanism. Most of computational approach to deal with flow in the porous media employ many forms of empirical methods to model the flow resistance inside the porous zone; however, some of empirical coefficients used in the methods are not always easy to determine. In this paper, computational models for actual porous media as well as empirical methods are presented in order to quantifying the relevant coefficients and the results are compared with experimental measurement carried out for perforated plate. Both 2D and 3D porous zone are analyzed, showing that empirical methods using known pressure loss and Ergun equation are capable of assessing pressure drop in the flow through the porous zone, except for Ergun equation’s application to 2D flow. The present results suggest that the mitigation devices to particulate flow such as volcanic ash can be analyzed and developed using computational fluid dynamics.
참고문헌 (12)
- Wilson, T., "Volcanic Ash Fall vulnerability analysis and impact assessment", Proc. 4th Int. Workshop for Volcanic Disaster Preparedness (2014)
- 함희정, "농업시설물에 대한 화산재 취약도 평가", 한국전산구조공학회논문집, 27(6), pp.493~500 (2014), 한국전산구조공학회[DOI]
- Hasert, M., "Lattice Boltzmann Simulation of non-Darcy Flow in Porous Media", Procedia Computer Science, International 10. Conference on Computer Science, 4, pp.1048~1057 (2011)
- Kim, J. H., "Pressure Drop and Regeneration of a Pellet Filter for Diesel Particulate Trap", J. Res. Inst. Indust. Tech., 25, pp.54~58 (2006)
- Park, C. W., "Porous Fence Effects on Surface-Pressure of a Triangular Prism in Atmospheric Boundary Layer", Trans. Korean Soc. Mech. B., 20(8), pp.2670~2680 (1996)
- 손영석, "다공성매질을 삽입한 수평채널의 열전달 및 압력강하 특성", 한국마린엔지니어링학회지, 33(2), pp.244~251 (2009), 한국마린엔지니어링학회
- Piscaglia, F., "Multi-dimensional computation of compressible reacting flows through porous media to apply to Internal Combustion Engine simulation", Mathematical and Computer Modelling, 52, pp.1133~1142 (2010)
- Hunt, M. L., "Effect of Thermal Dispersion on Forced Convection in Fibrous Media", International Journal of Heat and Mass Transfer, 31(2), pp.301~309 (1988)
- 이승수, "타일형 지분 외장재의 내풍성 전산 해석", 한국풍공학회지, 6(1), pp.60~65 (2002), 한국풍공학회
- Lim, H. C., "A Numerical Study on the Shelter Effect behind a Porous Wind Fence", J. Wind Eng. Inst. Korea, 4(1), pp.74~81 (2000)
- Perry, R. H., "Perry’s Chemical Engineer's Handbook" (1984), McGraw-Hill
- Ergun, "Fluid Flow through Packed Columns", Chem. Eng. Prog., pp, pp.89~94 (1952)