稀薄流过渡区气固两相喷流的建模与数值模拟

从描述粒子运动的细观层次出发,运用DSMC方法,构造了稀薄流过渡区气固相互作用模型和颗粒碰撞模型,数值模拟了有气固两相横向喷流干扰的二维有限平板高超声速流场,分析了流场结构和物面气动系数分布等特性.结果表明,对于不同的来流Knudsen数和颗粒质量载荷等参数,喷流干扰流场存在差异,同时反映了基于DSMC方法的气固相互作用模型是研究稀薄及过渡条件下的气固两相流动的有效方法.

Modeling and numerical simulation of gas-solid jet in the transitional-rarefied regime

An approach is presented for computing the interaction between rarefied gas and spherical particles via the direct simulation Monte Carlo(DSMC) method.Simulations are performed for the case of gas-solid transverse jet from a two-dimensional flat plate interacting with rarefied external flows in the transitional regime.The structure of flow field and the aerodynamics properties on the plate surface are analyzed in details.The results show that the interacting flow fields are different on the varied Knudsen parameter and loading ratio etc,and the method for solving the gas-solid interaction based on DSMC is appropriate for studying the gas-solid flow in the transitional-rarefied regime.