McNeese State University Department of Engineering

Purpose Numerical Simulation Experimental Study Comparison of Numerical Simulation Against Experimental Study Analysis Conclusion Future Research

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

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.

ANSYS COMPUTER SIMULATION Twenty-Five Second Simulation Using Fluent Software to Simulate the Flow of Water Over a Road

ANSYS COMPUTATIONAL FLUID DYNAMICS (CFD) STUDY Velocity Magnitude Shear Force

EXPERIMENTAL STUDY Validation for the Simulation Model Experimental Study to Conduct On-Site Data Data Loggers Record Water Pressure Variations

EXPERIMENTAL DESIGN Test Structure by LA Ash, Inc. Dimensional Design Strain Gage Placement Test Structure Materials Structural Design

TEST BED PLACEMENT AREA

DATA COLLECTION Low Tide Levee Placement High Tide Data Collection Duration and Timing of Data Collection

TEST LEVEE Test Levee StructureWave Crash on Test Levee

EXPERIMENTAL & SIMULATION DATA

EXPERIMENTAL VS. SIMULATION Low Frequency FFTHigh Frequency FFT

CONCLUSIONS Study Provided Experimental Data to Support CFD Study Study Revealed Hidden Velocities, Shear Forces, and Surface Pressures Study Revealed Causes of Erosion

FUTURE RESEARCH Correction of Erosion Causes Road Construction Materials Hard Barriers Soft Barriers

ACKNOWLEDGEMENTS Louisiana Transportation Research Center LA Ash, Inc.

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. IMECE 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: , 1969 Howe, M.S., Theory of Vortex Sound, Cambridge University Press, Cambridge Geokon Embedment Strain Gage Model 3900 Instruction Manual

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