Frozen water waves over rough topographical bottoms

Two-dimensional droplet spreading over random topographical substrates

We examine theoretically the effects of random topographical substrates on the motion of two-dimensional droplets via appropriate statistical approaches. Different random substrate families are represented as stationary random functions. The variance of the droplet shift at both early times and in the long-time limit is deduced and the droplet footprint is found to be a normal random variable at all times. It is shown that substrate roughness decreases droplet wetting, illustrating also the tendency of the droplet to slide without spreading as equilibrium is approached. Our theoretical predict…

将 Reynolds 力向量从高保真数据冻结传播到二次流的 Reynolds 平均模拟

Frozen propagation of Reynolds force vector from high-fidelity data into Reynolds-averaged simulations of secondary flows

针对高保真数据注入 RANS 时的误差放大问题，提出 Reynolds 力向量冻结传播并加入湍动能修正，在低、高 Reynolds 数二次流中均显著降低误差。