Browse > Article

Investigation of Flow Characteristics of Sharply Curved Channels by Using CCHE2D Model  

Kim, Yeon-Su (충남대학교 토목공학과)
Jang, Chang-Lae (충주대학교 토목공학과)
Lee, Gi-Ha (충남대학교 건설방재연구소)
Jung, Kwan-Sue (충남대학교 토목공학과)
Publication Information
Journal of the Korean Society of Hazard Mitigation / v.10, no.5, 2010 , pp. 125-133 More about this Journal
Abstract
In general, curved bends raises a risk of overtopping due to floods and also threatens a bank safety due to a local flow concentration. This study aims to test the applicability of CCHE2D model for experimental flumes with two different types of bends and then investigate flow characteristics in the sharply-curved bend of a natural channel. The results demonstrated that the percent error of water level was within 4.9% for experimental flume applications and the simulated spatial distribution of velocity matched the observed results very closely. The calibrated model based on the experimental flumes was also applied to analyze the flow characteristics in natural channel bends of the Daeyu reach, located in a downstream of the Youngdam Dam. The results showed that in upstream, the simulated water level by the CCHED was observed at 1.5 m higher than the 1-D numerical model (HEC-RAS) result since the HEC-RAS could not represent the bend geometry effect on streamflow. However, the calculated results by several empirical formula support that the CCHE2D is suitable for the super elevation simulation as well as flood stage and velocity in a natural channel bend.
Keywords
Bend; CCHE2D; Super-elevation; Flood stage;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Molls, T. and Chaudhry, M.H. (1995) Depth averaged open-channel flow model, Journal of Hydraulic Engineering, ASCE, Vol. 121, No. 6, pp. 453-465.   DOI   ScienceOn
2 Rozovskii, I.L. (1961). Flow of water in bends of open channels, Israel Program for Scientific Translations, Jerusalem, Israel., pp. 69-143.
3 Schlichting, H. and Gersten, K. (2000). Boundary-Layer Theory, 8th edt, Springer, Berlin.
4 Shukry, A. (1950). Flow around bends in an open flume". ASCE Trans., Vol. 115, pp. 751-779.
5 Wang, S.S.Y. and Hu, K.K. (1992) Improved methodology for formulating finite element hydrodynamic models, Finite Element in Fluids, Vol. 8, Hemisphere Publication Cooperation, pp. 457-478.
6 Chow, V.T. (1986) Open-Channel Hydraulics, McGRAW-HILL Books Co., pp. 439-460.
7 De Vriend (1977) A mathmatical model of steady flow in curved open channels, Journal of Hydraulic Research, IAHR, Vol. 15, No. 1, pp. 37-52.   DOI   ScienceOn
8 Duan, J.G. (2004) Simulation of Flow and Mass Dispersion in Meandering channel, Journal of Hydraulic Engineering, ASCE, Vol. 130, No. 10, pp. 964-976.   DOI   ScienceOn
9 Jia, Y. and Wang, S.S.Y. (2001) CCHE2D Two-dimensional Hydrodynamic and Sediment Transport Model for Unsteady Open Channel Flows over Loose Bed, Technical Report No. NCCHETR-2001-1, The University of Mississippi.
10 Jia, Y. and Wang, S.S.Y. (2001) CCHE2D Verification and Validation Tests Documentation, Technical Report No. NCCHE-TRB 2001-2, The University of Mississippi.
11 Kahn, A.A. and Koshino, K. (2000) Application of Three Two-Dimensional Depth-Averaged Models to Flow in River Bends, in: Proc. 4th Int. Conf. on Hydro-Science and Engineering(CDROM), 2000, Seoul, KWRA.
12 Leschziner, M.A. and Rodi, W. (1979) Calculation of strongly curved open channel flow, Journal of Hydraulic Division, ASCE, Vol. 105, No. 10, pp. 1297-1314.
13 Lien, H.C., Hsieh, T.Y. and Yang, J.C. (1999) Bend flow simulation using 2D depth-Averaged model, Journal of Hydraulic Engineering, ASCE, Vol. 125, No. 10, pp. 1097-1108.   DOI
14 박상덕 (2009) 산지하천 수충부의 공학적인 문제와 과제, 한국수자원학회지, Vol. 42, No. 6, pp. 66-69.   과학기술학회마을
15 우효섭 (2007) 하천수리학, 청문각, p. 217.
16 윤광석 (2003) CCHE2D 모형의 적용성 검토, 대한토목학회 학술대회 논문집, Vol. 2003 No.10, pp. 1960-1965
17 윤세의, 이종태, 이원환 (1986) 만곡수로에서 2차원 흐름해석, 대한토목학회논문집, Vol. 6, No. 1, pp. 87-94.
18 이광만, 이을래, 이요상 (2009) 댐과 하천정비사업의 연계 효과 분석, 한국수자원학회 학술대회논문집, pp. 1616-1620
19 이규환 (2006). 사행수로의 흐름특성에 관한 실험적 연구, 공학석사학위논문, 서울대학교
20 이길성, 김태원, 박재현 (2006), 급변만곡부에서 종방향 유속의 연직분포, 한국수자원학회 논문집, Vol. 39, No. 12, pp. 1023-1030   과학기술학회마을
21 이정규, 김주영, 박현진, 강지예 (2009) 한강 이촌-반포 만곡부의 편수위 연구, 한국수자원학회 학술대회논문집, pp. 810-814.
22 한국수자원공사 (2009) 용담댐 하류하천 정비사업.
23 정대진 (2007) FLUMEN 모형에 의한 갑천과 유등천 합류부 흐름특성 분석, 공학석사학위논문, 충남대학교.
24 정재욱, 정현수, 이종설, 윤세의 (2000) RMA-2 모형을 이용한 만곡수로의 흐름특성 분석, 대한토목학회 논문집, Vol.20, No.4-B, pp. 479-489.
25 최호균, 김원일, 류영훈, 이삼희, 안원식 (2007) 하천 협착부에서 하도형태에 관한 하도수리학적 평가 -낙동강 선산지구를 중심으로-, 한국수자원학회 학술대회논문집, pp. 1711-1715.
26 Blanckaert, K. (2002) Flow and turbulence in sharp open channel bends, Ph.D thesis, Ecole Polytechnique Federale de Lausannne, Lausanne, EPFL, Switzerland.
27 Chang, H.H. (1984) Variation of flow resistance through curved channels. Journal of Hydraulic Engineering, ASCE, Vol. 110, No. 12, pp. 1772-1782.   DOI   ScienceOn
28 김상호, 김원, 우효섭, 한건연 (2001) 2차원 동수역학 해석을 위한 CCHE2D 모형의 적용, 한국수자원학회 학술발표회 논문집(II), pp. 871-876.
29 건설교통부 (2002) 금강수계 하천정비기본계획.
30 건설교통부 (2006) 2006년 7월 태풍 및 집중호우 피해조사.
31 김남형 (2002) 수치유체역학, 원기술, pp. 345-377.
32 김연수 (2010) CCHE2D모형을 이용한 용담댐 하류의 만곡부 흐름특성분석, 공학석사학위논문, 충남대학교.
33 김윤태, 김지호, 박영진, 송재우 (1996) 만곡수로에성의 편수위상승 산정 모형에 관한 연구, 한국수자원학회 학술발표회 논문집, pp. 69-74.
34 김준호, 장창래 (2009) CCHE2D 모형을 이용한 합류부에서 흐름 및 하상변동 분석, 한국수자원학회 학술발표회 논문집, pp. 678-682.
35 노의근 (2003) 난류론, 시그마프레스, pp. 1-42.