A STUDY ON WAVE-INDUCED PARTICLE VELOCITIES IN FLUID MUD LAYER
AbstractCohesive sediments can be found in many coastal zones all over the world. The upper layer of these muddy coasts may be fluidized under the wave action. Fluid mud is also formed by settlement of fine particles when the waves and currents exert a small shearing stress on the bed. When the waves pass over the fluid mud layer, it absorbs wave energy and, in turn, moves due to the wave action. The present study offers a numerical and experimental study of wave-mud interaction on a horizontal bed. A number of wave flume laboratory tests are presented to investigate wave attenuation, particle velocities in fluid mud layer and mud mass transport under different wave characteristics. The laboratory results are also compared with a developed semi-analytical model.
An, N.N., and T. Shibayama. 1994. Wave-current interaction with mud bed. Proceedings of 24th International Conference on Coastal Engineering, ASCE, 2913-2927.
Dalrymple, R.A., and P.L. Liu. 1978. Waves over soft muds: a two-layer fluid model. Journal of Physical Oceanography, 8 (6), 1121-1131.
Dore, B.D. 1970. Mass transport in a layered fluid system. Journal of Fluid Machanics, 40, 113-126.
Gade, H.G. 1958. Effects of a nonrigid, impermeable bottom on plane surface waves in shallow water. PhD Thesis, Texas A&M University, Texas, 35 pp.
Hsu, W.Y., Hwung, H.H., Hsu, T.J., Torres-Freyermuth, A., and Yang, R.Y., An experimental and numerical investigation on wave-mud interactions. Journal of Geophysical Research: Oceans, 118, 1126-1141.
Maa, J.P.Y., and A.J. Mehta. 1990. Soft mud response to water waves. Journal of waterway, port, coastal, and ocean engineering, 116 (5), 634-650.
Sakakiyama, T., and E.W. Bijker. 1989. Mass transport velocity in mud layer owing to progressive waves. Journal of Waterway, Ports, Coastal and Ocean Engineering, ASCE, 115 (5), 614-633.
Shibayama, T., Okuno, M., and S. Sato. 1990. Mud transport rate in mud layer due to wave action. Proceedings of 22nd International Conference on Coastal Engineering, ASCE, 3037-3038.
Soltanpour M., Shibayama T., and Y. Masuya 2007. Irregular wave attenuation and mud mass transport, Coastal Engineering Journal, Vol. 49, No. 2, 127-148.
Soltanpour, M., and F. Samsami. 2011. A comparative study on the rheology and wave dissipation of kaolinite and natural Hendijan Coast mud the Persian Gulf. Ocean Dynamics, 61 (2-3), 295-309.