ライブラリ登録: Guest
Journal of Flow Visualization and Image Processing

年間 4 号発行

ISSN 印刷: 1065-3090

ISSN オンライン: 1940-4336

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 0.6 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.6 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00013 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.14 SJR: 0.201 SNIP: 0.313 CiteScore™:: 1.2 H-Index: 13

Indexed in

REDUCTION OF SCOUR AROUND BRIDGE PIERS USING A VORTEX GENERATOR

巻 26, 発行 3, 2019, pp. 279-299
DOI: 10.1615/JFlowVisImageProc.2019029301
Get accessGet access

要約

Local scours around bridge piers is a complex phenomenon that imperils the safety of river bridges. The flow pattern and scouring mechanism are very complicated. Reduction of scours around obstacles has taken too much research but few countermeasures have been proposed. In this paper, we propose a new countermeasure; it consists of vortex generator (VG) geometry attached to the bridge pier. This geometry is used to break the downflow and reduces the wake zone behind the bridge pier. For that purpose, a number of numerical simulations have been carried out using a finite volume method (FVM) and for the turbulence model we have chosen the detached eddy simulation (DES) for its capability to capture the rich dynamics of the horseshoe vortex at the upstream junction between the pier and the bed. The results of the present study show that the vortex generator attached to the pier strongly affects the flow pattern around it; also, the results show a reduction of about 21% in the bed shear stress.

参考
  1. Ali, K.H.M and Karim, O., Simulations of Flow around Piers, J. Hydraulic Res., vol. 42, no. 2, pp. 161-174, 2002.

  2. Briaud, J.L., Ting, F., Chen, H., Cao, Y., Gudavalli, R., and Perugu, S., SRICOS: Prediction of Scour Rate in Cohesive Soils at Bridge Piers, J. Geo. Geoenv. Soc. Am., ASCE, vol. 125, no. 4, pp. 237-246, April 1999.

  3. Dargahi, B., The Turbulent Flow Field around a Circular Cylinder, J. Exp. Fluids, vol. 8, nos. 1-2, pp. 1-12, 1989.

  4. Debnath, K. and Chaudhuri, S., Local Scour around Non-Circular Piers in Clay-Sand Mixed Cohesive Sediment Beds, J. Eng. Geology, vol. 151, Technical Note, Elsevier, pp. 1-14, 2012.

  5. Dey, S., Bose, S.K., and Sastry, G.L.N., Clear Water Scour at Circular Piers: A Model, J. Hydraul. Eng., vol. 121, no. 12, pp. 869-876, 1995.

  6. Escauriaza, C. and Sotiropoulos, F., Reynolds Number Effects on the Coherent Dynamics of the Turbulent Horseshoe Vortex System, J. Flow Turbulence Combust., vol. 86, no. 2, pp. 231-262, 2011.

  7. Graf, W.H. and Istiarto, I., Flow Pattern in the Scour Hole around a Cylinder, J. Hydraulic Res., vol. 40, no. 1, pp. 13-20, 2002.

  8. Guemou, B., Seddini, A., and Ghenim, A.N., Numerical Investigations of the Bridge Pier Shape Influence on the Bed Shear Stress, EJGE, vol. 18, Bund. Y, pp. 5685-5698, 2013.

  9. Guemou, B., Seddini, A., and Ghenim, A.N., Numerical Investigations of the Round-Nosed Bridge Pier Length Effects on the Bed Shear Stress, Prog. Comput. FluidDyn., vol. 16, no. 5, pp. 313-321, 2016.

  10. Huang, W., Yang, Q., and Xiao, H., CFD Modeling of Scale Effects on Turbulence Flow and Scour around Bridge Piers, J. Computers Fluids, vol. 38, pp. 1050-1058, 2009.

  11. Khosronejad, A., Kang, S., and Sotiropoulos, F., Experimental and Computational Investigation of Local Scour around Bridge Piers, J. Adv. Water Resources, vol. 37, pp. 73-85, 2012.

  12. Liu, C., Liu, C., and Wenxing, M., RANS, Detached Eddy Simulation and Large Eddy Simulation of Internal Torque Converters Flows: A Comparative Study, J. Eng. Appl. Comput. Fluid Mech., vol. 9, no. 1, pp. 114-125, 2015.

  13. Masjedi, A., Bejestan, M.S., and Esfandi, A., Reduction of Local Scour at a Bridge Pier Fitted with a Collar in a 180 Degree Flume Bend, 9th Int. Conf. on Hydrodynamics, October 11-15, Shanghai, China, vol. 22, no. 5, pp. 669-673, 2010.

  14. Najafzadeh, M. and Barani, Gh.A., Comparison of Group Method of Data Handling Based Genetic Programing and Back Propagation Systems to Predict Scour Depth around Bridge Piers, J. Sciebtia Iranica, vol. 18, no. 6, pp. 1207-1213, 2011.

  15. Oliveto, G. and Hager, W.H., Temporal Evolution of Clear-Water Pier and Abutment Scour, J. Hydraul. Eng., vol. 128, no. 9, pp. 811-820, 2002.

  16. Paik, J., Escauriaza, C., and Sotiropoulos, F., On the Bimodal Dynamics of the Turbulent Horseshoe Vortex System in a Wing-Body Junction, J. Phys. Fluids, vol. 19, no. 4, pp. 1-20, 2007.

  17. Pal, M.N., Singh, K., and Tiwari, N.K., M5 Model Tree for Pier Scour Prediction Using Field Dataset, J. Civil Eng., vol. 16, no. 6, pp. 1079-1084, 2011.

  18. Pasiok, R. and Stilger-Szydlo, E., Sediment Particles and Turbulent Flow Simulation around Bridge Piers, Arch. Civil Mech. Eng., vol. 10, no. 2, pp. 67-79, 2010.

  19. Richardson, E.V. and Davis, S.R., Evaluating Scour at Bridges, 4th Ed., Federal Highway Administration, Washington, DC, Hydraulic Engineering Circular No. 18, FHWA NHI 01-001, 2001.

  20. Roulund, A., Utlu Sumer, B., Fredsoe, J., and Michelsen, J., Numerical and Experimental Investigation of Flow and Scour around a Circular Pile, J. FluidMech., vol. 534, pp. 351-401, 2005.

  21. Spalart, P.R., Jou, W.-H., Strelets, M., and Allmaras, S.R., Comments on the Feasibility of LES for Wings, and on a Hybrid RANS/LES Approach, Proc. of the First AFOSR Int. Conf. on DNS/LES, Ruston, LA, 1997.

  22. Sumer, B.M., Mathematical Modeling of Scour: A Review, J. Hydraulic Res., vol. 45, no. 6, pp. 723-735, 2007.

  23. Unger, J. and Hager, W.H., Down-Flow and Horseshoe Vortex Characteristics of Sediment Embedded Bridge Piers, J. Exp. Fluids, vol. 42, no. 1, pp. 1-19, 2007.

  24. Wardhana, K. and Hadipriono, F., Analysis of Recent Bridge Failures in the United States, J. Perform. Constr. Facil, ASCE, vol. 17, no. 3, pp. 144-150, 2003.

  25. Zhao, M., Cheng, L., and Zang, Z., Experimental and Numerical Investigation of Local Scour around a Submerged Vertical Circular Cylinder in Steady Currents, J. Coast. Eng., vol. 57, no. 8, pp. 709-721, 2010.

Begell Digital Portal Begellデジタルライブラリー 電子書籍 ジャーナル 参考文献と会報 リサーチ集 価格及び購読のポリシー Begell House 連絡先 Language English 中文 Русский Português German French Spain