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An Experimental Study on Surface Wave Modulation Due to Viscoelastic Bottom

  • Dharma Sree
  • Adrian Wing-Keung Law
  • Hayley H. Shen
Conference paper
Part of the Lecture Notes in Civil Engineering book series (LNCE, volume 23)

Abstract

In the present study, we developed viscoelastic bottom layers of required rheological properties in the laboratory using a mixture of a polymer, polydimethylsiloxane with glycerol. The properties of the viscoelastic layers were quantified using oscillatory shear tests in a rheometer. Wave flume experiments with different viscoelastic bottom layers were then conducted under shallow water conditions. The synchronized time series data at seven locations along the direction of wave propagation were obtained using ultrasound sensors, which were used to determine the attenuation rate due to the presence of the bottom boundary. The results of the analysis showed that the attenuation rate of waves change with the variation of rheological property of bottom boundary, with the softer bottom attenuating the waves more significantly.

Keywords

Viscoelastic bottom Attenuation Shallow water 

Notes

Acknowledgements

This work is supported by US Office of Naval Research Grant #N00014-13-1-0294 and US Office of Naval Research Global Grant No: N62909-15-1-2069. The authors would like to thank Mr. Peh Zhisheng at the Nanyang Technological University for assisting in the experiments.

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Dharma Sree
    • 1
    • 2
  • Adrian Wing-Keung Law
    • 1
    • 2
  • Hayley H. Shen
    • 1
    • 3
  1. 1.Environmental Process Modelling Centre (EPMC), Nanyang Environment and Water Research Institute (NEWRI)Nanyang Technological University1 CleanTech Loop,Singapore
  2. 2.School of Civil and Environmental EngineeringNanyang Technological University50 Nanyang AvenueSingapore
  3. 3.132 Rowley Laboratories Civil and Environmental EngineeringClarkson UniversityPotsdamUSA

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