Two approaches are proposed to simulate tsunamis generated by granular landslides: a depth-averaged model, AVALANCHE, and laminar Navier–Stokes simulations using the OpenFOAM model. Both models are validated against two 2D benchmarks, a subaerial and a submerged one involving a triangle initial slide shape. In both models, the landslide is defined as a viscous fluid flowing downslope. Except in the first instants, both models can reproduce either the landslide behavior or the generated first water waves but cannot reproduce simultaneously both the landslide and the water surface. There is an overlap in the optimal viscosity range between both models. Sensitivity studies are carried out by varying the slope angle and the landslide submergence for the subaerial benchmark. The largest waves are obtained for initial landslide position close to the free surface. The height of the generated waves increases linearly with the slope angle and the landslide Reynolds number in the depth-averaged model. The relationships are more complex in the Navier–Stokes model. For low slide Reynolds numbers and with an initial slide close to the free surface, both models produce similar waves. Nine additional cases are performed with a $k-\epsilon$ turbulence closure model and varying the submergence and the slope angle.

提出了两种方法来模拟由颗粒滑坡产生的海啸：深度平均模型 AVALANCHE 和使用 OpenFOAM 模型的层流 Navier-Stokes 模拟。两种模型都针对两个 2D 基准进行了验证，一个是空中基准，另一个是水下基准，涉及三角形初始滑梯形状。在这两个模型中，滑坡被定义为向下流动的粘性流体。除了第一时刻，两种模型都可以再现滑坡行为或产生的第一次水波，但不能同时再现滑坡和水面。两种模型之间的最佳粘度范围存在重叠。通过改变地面基准的坡度角和滑坡淹没度来进行敏感性研究。在靠近自由表面的初始滑坡位置获得最大的波浪。在深度平均模型中，产生的波浪的高度随着坡度角和滑坡雷诺数线性增加。Navier-Stokes 模型中的关系更为复杂。对于低滑动雷诺数和接近自由表面的初始滑动，两种模型产生相似的波。九个额外的案例是用一个$克-\epsilon$ 湍流闭合模型和改变淹没和倾斜角。