本文采用离散颗粒单元法对流化床内颗粒运动及其与固定埋管受热面的相互作用进行颗粒直接数值模拟,其中颗粒之间的碰撞采用Tsuji等提出的软球碰撞模型处理,而流场的计算采用大涡模拟,其亚网格应力为Smagorinsky涡黏性模型,流动工况为两维鼓泡流化床.磨损量的估计是基于祝京旭等人的埋管磨损试验研究的结论,并结合本文数值模拟的结果,揭示了流化床埋管磨损量及其分布的若干规律.
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