中文摘要：

气相采用直接数值模拟方法、颗粒相采用拉格朗日轨道模型方法对摩擦雷诺数为180的充分发展槽道内Stokes数为1～10^4的颗粒趋壁沉积现象进行了研究。研究表明，惯性颗粒在湍流涡的作用下趋向壁面运动，并以一定速率沉积。在“吸收壁面”条件下沉积速率首先随着颗粒弛豫时间增大而增大，在弛豫时间大于100时，沉积速率保持不变。

英文摘要：

A fully developed two-phase channel flow with Reτ=180, laden with different particles with particle Stokes number from 1 to 104, was simulated by means of direct numerical simulation coupled with Lagrangian particle trajectory model. The particles accumulation and deposition near the wall were studied. The inertia particles tend to accumulate towards the walls with a certain deposition rate by turbulence eddies. Under the condition of ＂absorbing wall＂, the particle deposition velocity increases with particle relaxation time τrp first and then keeps constantly when τrp is larger than 100.