IMPINGEMENT OF NON-NEWTONIAN TSUNAMI BORES ON A VERTICAL STRUCTURE

Tsunami wave is a succession of waves produced by movement of great
volume of water which usually occur in the ocean. During its propagation in
shallow water region up to the inundation limits, the tsunami bore wave
transports bed materials i.e. sediments believed to amplify the damage towards
coastal structures along its path. The damage and danger that can be caused by
the tsunami wave are essential to be studied in order to reduce the amount of
damage. Besides, the suspended solid level might alter the rheology of the
waves i.e. from the Newtonian to non-Newtonian fluids. Consequently, the
alteration of the fluid constituents would affect the hydrodynamics of the
waves. As such, rigorous experimentations were conducted to evaluate the
extent of viscous and density influence on the wave hydrodynamics and the
subsequent loadings on a vertical test model. The main objective for this
experiment is to assess the wave kinematics and flow condition for bore
propagating over a horizontal dry flatbed subjected to Newtonian and nonNewtonian fluid of varying solid concentrations as well as to investigate the
impingement forces acting on a vertical structure subjected to Newtonian and
non-Newtonian fluids of different mixture concentrations via physical
modeling.