双层管与流体多场耦合数值模拟

Numerical simulation of multiphysics coupling for double-pipe and fluid

双层管与流体耦合作用是石油石化工程中普遍存在的物理现象,采用分域耦合方法,建立双层管与管内外流体的多场耦合力学模型;根据界面位移协调和力平衡条件及温度和热流密度连续性条件,推导耦合界面信息传递方法和收敛判断准则;为解决多场耦合大规模数值计算问题,提出流体特性描述数据库和分布式协同求解方法;通过算例分析双层管与管内外流体的温度场和流场耦合、位移场和流场耦合以及弹性管多场耦合,为指导工程应用和产品研发提供理论方法.

The interaction of double-pipe and fluid is general physics phenomenon in oil and petrochemical engineering.Partitioned coupling method was used to establish multiphysics coupled mechanical model of double-pipe and fluid.Based on the interface displacement compatibility and force equilibrium conditions,and the continuity boundary conditions of temperature and heat flux,information transfer method on coupling interface was derived,and convergence method was also derived.According to three types of coupling e...