温度体动网格模型中控制参数的研究

Parameter Control in Temperature Analogy Method

采用调整导热系数和源项分布的方式,对温度体动网格模型所生成的网格品质进行控制.温度体动网格模型将运动边界的位移虚拟为求解域的温度边界条件,以流体能量方程或固体导热方程作为控制方程,通过选取不同的导热系数或源项分布可以得到适合不同求解问题需要的温度分布,并将求解得到的网格节点的温度作为其动态位移量.采用温度体动网格模型计算平动、三维旋转运动、柔性体运动等流固耦合计算中可能涉及的动网格算例.结果表明,在计算效率和生成网格的品质方面,与已有的动态网格生成方法相比,具有较大的优势,可以有效解决流固耦合数值模拟中存在的动态网格生成难题.

Parameter control are used to adjust grid quality in temperature analogy method.Movement of boundary is considered as temperature boundary condition.Energy equation or heat conduction equation is solved to get temperature distribution.In temperature analogy method,node’s temperature is regarded as node’s movement.By using different thermal conductivity and source term,different temperature distributions/node’s movements are obtained to meet requirements.It shows that the method solves effectively dynamic grid puzzle in fluid-solid coupling.