OSCILLATORY BOTTOM BOUNDARY LAYER BY LOW-REYNOLDS NUMBER TURBULENCE MODEL

Toshiyuki Asano, Hitomi Goda, Yuichi Iwagaki

Abstract


Characteristics of mean velocity and turbulence properties in oscillatory bottom boundary layers are investigated with low- Reynolds number turbulence model. Since this model is capable to describe the flow field close to the bottom, special attentions are paid on the characteristics of the viscous sublayer. Several interesting results, which coincide with or differ from existing knowledge on steady bottom boundary layers, are presented in paticular on the mean velocity profile, turbulent viscosity coefficient and growth of the viscous sublayer.

Keywords


low Reynolds number turbulence; turbulence model; bottom boundary layer; oscillatory boundary layer

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