粘塑性流体の跳水現象の数値解析

抄録

Hydraulic jump of viscoplastic fluids in a two-dimensional open channel was numerically analyzed. The numerical simulation was performed with an open-source CFD software OpenFOAM. The viscoplasticity is described using Herschel-Bulkley model as a constitutive equation. Flows in a two-dimensional open channel with a dam. In viscoplastic flows, the magnitude of stress exceeds the yield stress and the apparent viscosity dramatically decreases with increasing the flow rate. As a result, the height of hydraulic jump notably appears at high flow rates.