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Evaluation of Erosion for Coastal Highways & Levees

Lane everett Blocker Dr. Ning Zhang & Dr. Zhuang Li, Faculty Mentors. Evaluation of Erosion for Coastal Highways & Levees. McNeese State University Department of Engineering. OUTLINE. Purpose Numerical Simulation Experimental Study

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Evaluation of Erosion for Coastal Highways & Levees

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  1. Lane everett Blocker Dr. Ning Zhang & Dr. Zhuang Li, Faculty Mentors Evaluation of Erosion for Coastal Highways & Levees McNeese State University Department of Engineering

  2. OUTLINE • Purpose • Numerical Simulation • Experimental Study • Comparison of Numerical Simulation Against Experimental Study • Analysis Conclusion • Future Research

  3. PURPOSE • Coastal Highways Protect Coastal Shorelines • Highways Serve as Barrier to Flood Damage • Loss of Emergency Routes from Coastal Areas • Significant Costs Related to the Rebuilding of Failed Highways • A Better Understanding of Erosion Forces • A Need for Better Highway Construction and Materials

  4. PURPOSE Highway 82 was damaged by hurricane when storm surge toped the highway The damage Occurred in the north shoulder of the highway The need arose to understand the physics behind this erosion.

  5. ANSYS Computer Simulation Twenty-Five Second Simulation Using Fluent Software to Simulate the Flow of Water Over a Road

  6. ANSYS Computational Fluid Dynamics(CFD) Study Velocity Magnitude Shear Force

  7. Experimental Study • Validation for the Simulation Model • Experimental Study to Conduct On-Site Data • Data Loggers Record Water Pressure Variations

  8. Experimental Design • Test Structure by LA Ash , Inc. • Dimensional Design • Strain Gage Placement • Test Structure Materials Structural Design

  9. Test Bed Placement area

  10. Data Collection • Low Tide Levee Placement • High Tide Data Collection • Duration and Timing of Data Collection

  11. Test Levee Test Levee Structure Wave Crash on Test Levee

  12. Experimental & Simulation Data

  13. Experimental vs. Simulation Low Frequency FFT High Frequency FFT

  14. Conclusions • Study Provided Experimental Data to Support CFD Study • Study Revealed Hidden Velocities, Shear Forces, and Surface Pressures • Study Revealed Causes of Erosion

  15. Future Research • Correction of Erosion Causes • Road Construction Materials • Hard Barriers • Soft Barriers

  16. Acknowledgements Louisiana Transportation Research Center LA Ash, Inc.

  17. references • Zhang, N., Li, Z., Klemetson, S., Yadagiri, S., 2010, CFD and Acoustical Analysis for Coastal Highway Erosion, 2010 ASME International Mechanical Engineering Congress & Exposition, November 12-18, Vancouver, Canada, paper-No. IMECE2010-37142 • ANSYS FLUENT 12.0/12.1 Documentation • Brentner K.S., Farassat, F., An Analytical Comparison of the Acoustic Analogy and Kirchhoff Formulations for Moving Surface. AIAA Journal, 36(8), 1998 • Ffowcs-Williams J.E., Hawkings, D.L., Sound Generation by Turbulence and Surfaces in Arbitrary Motion. Proc. Roy. Soc. London, A264: 321-342, 1969 • Howe, M.S., Theory of Vortex Sound, Cambridge University Press, Cambridge • Geokon Embedment Strain Gage Model 3900 Instruction Manual

  18. questions?

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