耦合有限体积法的Brown构型场并行算法

基于FENE珠-簧链分子模型,采用耦合有限体积法的Brown构型场并行算法,对压力驱动、速度-压力同向或反向驱动的管道流进行数值模拟.数值算例验证了算法的有效性,获得了相应速度、应力及分子链拉伸量的信息.数值结果表明:链段数的增加使得流动达到稳态所需时间缩短;该并行算法有效地克服了Brown构型场方法计算量大、耗时长的缺点;当珠子数大于2时,并行效率可达85%以上.

Parallel Algorithm for Brownian Configuration Fields with Finite Volume Method

In a FENE bead-spring chain model,a parallel algorithm for Brownian configuration fields with finite volume method is used to simulate pressure driven pipe flows,velocity-pressure driven pipe flows with same and opposite directions.Validity of the algorithm is verified with numerical examples.Velocity,stress and stretch of molecular chain of pipe flows are obtained.It shows that the proposed algorithm overcomes shortcomings of huge computation and time-consuming for Brownian configuration fields.And it has excellent expansibility.Parallel efficiency is over 85% as number of beads is greater than two.It also shows that the time of flow to reach steady state is shorter with increasing number of chain segments.