摘要
松耦合算法在数值模拟流固耦合问题时具有应用简单和计算高效的优势,但是需要解决流固界面上的信息传递算法.理论上在同时满足速度和位移相等条件是不可能的.本文基于界面上流固位移相等条件的松耦合,采用新的几何守恒律算法,对具有理论解的活塞问题进行了求解,数值实践表明新方法具有良好的计算精度.算例表明基于新几何守恒律的流体计算方法能良好的与传统的动力学方法Newmark方法相结合,新的松耦合方法在流固耦合数值模拟方面具有良好的应用前景.
The algorithm of transmission in information on the fluid-solid interface should be addressed of the loosely coupled algorithm which is simple and computationally efficient numerical method on simulation of fluid-structure interaction problems.It is impossible to ensure,theoretically,the equivalence of the velocity and displacement conditions at the same time.Piston problems,have the analytical solution,is solved by the loosely coupled algorithm of new GCLin this paper which based on the equivalence of displacement.The examples show that good performance of the new algorithm on the precision.And the combination of the Newmark method and the CFD has a good prospect in the numerical simulation of fluidstructure interaction.
出处
《固体力学学报》
CAS
CSCD
北大核心
2013年第S1期171-175,共5页
Chinese Journal of Solid Mechanics
关键词
流固耦合
松耦合算法
几何守恒律
活塞
fluid-structure interaction
the loosely coupled algorithm
the geometric conservation law
piston
