应能源与动力工程学院刘海湖教授的邀请，新加坡国立大学的王岩博士将于2017年10月14日至16日来我校进行学术访问，并针对复杂多相流数值模拟的进展进行一次公开学术讲座，届时欢迎各位师生参与交流。

讲座题目：网格自适应算法及其在复杂多相流模拟中的应用

讲座时间：2017年10月15日上午10:00 -12:00

讲座地点：北二楼1402会议室

讲座人：王岩博士

讲座内容：

This talk disscusses the development of an adaptive mesh refinement-multiphase lattice Boltzmann flux solver (AMR-MLBFS) for effective simulation of complex binary fluid flows at large density ratios. In this method, an AMR algorithm is proposed by introducing a simple indicator on the root block for grid refinement and two possible statuses for each block. Unlike available block-structured AMR methods, which refine their mesh by spawning or removing four child blocks simultaneously, the present method is able to refine its mesh locally by spawning or removing one to four child blocks independently when the refinement indicator is triggered. As a result, the AMR mesh used in this work can be more focused on the flow region near the phase interface and its size is further reduced. In each block of mesh, the recently proposed MLBFS is applied for the solution of the flow field and the level-set method is used for capturing the fluid interface. As compared with existing AMR-lattice Boltzmann models, the present method avoids both spatial and temporal interpolations of density distribution functions so that converged solutions on different AMR meshes and uniform grids can be obtained. The proposed method has been successfully validated by simulating a static bubble immersed in another fluid, a falling droplet, instabilities of two-layered fluids, a bubble rising in a box and droplet splashing on a thin film with large density ratio and high Reynolds number. Good agreements with the theoretical solution, the uniform-grid result and/or the published data have been achieved. Numerical results also show its effectiveness in saving computational time and virtual memory as compared with computations on uniform meshes.

讲座人简介：

王岩博士现在是新加坡国立大学淡马锡实验室的Research Scientist。他于2014年获得新加坡国立大学的工学博士学位。他的研究兴趣包括计算流体力学方法及其应用，多相流数值模拟，流固耦合等。王岩博士基于格子玻尔兹曼方法提出了一系列的通量求解算法，能够在任意非结构网格下模拟不可压、传热、多相流和可压缩流动，引起了广泛关注。目前为止，王岩博士已经发表SCI论文近30篇，其中2篇文章入选ESI高被引论文，9篇Journal of Computational Physics, 2篇Physics of Fluids。