Abstract
This research presents recent advances on morphodynamic modeling of dunes. Boundary layer separation over gravel fixed dune has been investigated by using particle image velocimetry (PIV) technique. In order to complement and verify the measurements, both ADV and PIV techniques were used. The experiments were focused on the flow pattern based on different dune discharge. The final aim of this research is to improve the knowledge about separation zone. Therefore, the numerical model successfully simulates flow over dune. In order to assess the accuracy of experimental results, a numerical model (SSIIM) was used. The results of this numerical model show that ADV has a weakness point in measuring data 3 cm near to bed, whereas PIV results are more closed to the numerical model.
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Acknowledgments
First, the author is grateful to Prof. Gerald Zenz for his kind support of this research in the Institute of Hydraulic Engineering and Water Resource Management, Graz university of Technology, Austria.
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Motamedi, A., Afzalimehr, H., Harb, G., Galoie, M. (2014). Particle Image Velocimetry (PIV) Measurement and Numerical Modeling of Flow Over Gravel Dune. In: Gourbesville, P., Cunge, J., Caignaert, G. (eds) Advances in Hydroinformatics. Springer Hydrogeology. Springer, Singapore. https://doi.org/10.1007/978-981-4451-42-0_43
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DOI: https://doi.org/10.1007/978-981-4451-42-0_43
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