风沙两相流数值模拟研究进展

大气表面层中的风沙运动是典型的高雷诺数湍流气固两相流动，同时具有可蚀地表上的冲击溅起过程、风-沙-电多场耦合、多尺度与跨尺度等复杂特性，使其定量预测极具挑战性。回顾了近30年风沙运动数值模拟的研究进展以及取得的成果，主要包括基于湍流雷诺平均Navier-Stokes （RANS）方法的风沙运动多场耦合模拟与风成地貌耦合尺度模型建立，基于湍流大涡模拟（LES）与高雷诺数湍流理论的风沙运动模拟方法。最后明确了风沙运动现有数值模拟方法的不足和值得进一步研究的方向。

Advances in numerical simulation of wind-blown sand

Wind-blown sand in the atmospheric surface layer is a typical two-phase flow characterized by the splashing process as sand particles impacting the erodible surface bed, multi-field coupling among turbulent wind, electrostatic field and charged sand particles, and multiscale and trans-scale problem. Therefore, accurate simulation and prediction of wind-blown sand has been very challenging. In this paper, we review the research progresses obtained in the past 30 years, including mainly simulation of multi-field coupling of wind-blown sand and scale-coupled model of aeolian geomorphology based on Reynolds-Averaged Navier-Stokes (RANS) equations, and simulation of sand movement based on Large Eddy Simulation (LES) and high Reynolds number wall turbulence. Shortcomings of existing numerical simulation methods for aeolian sand movement and the directions worthy of further research are also discussed.