【摘要】 在用无网格方法对有边界移动的气固两相流动进行数值模拟时发现,如果采用背景积分网格对求解域进行积分,将会产生压力场的数值振荡,使计算结果失真.详细分析了产生这种数值振荡的原因,提出了解决方案,并计算了一个颗粒在管道内的下降过程.计算结果表明,提出的解决方案能有效地降低压力场的数值振荡,从而使无网格方法能应用于气固两相流动的直接数值模拟.更多还原

【Abstract】 In a direct numerical simulation of gas-particle flow with meshless method,if the integral is carried out with common background integral cells numerical pressure fluctuation occurs.It results in unsuccessful computations.We analyze the reason and develope a solution strategy.It is used in the simulation of one particle dropping.Reasonable results are obtained.It shows that the new strategy avoids pressure fluctuation.更多还原