基于Brown构型场的黏弹性流体数值模拟算法

Numerical Simulation Algorithm of Viscoelastic Fluid Based on Brown Configuration Field

基于黏弹性流体的微宏观耦合模型,提出一种求解Brown构型场方程的含双参数的预估校正数值方法,并通过突然起动的平板Couette流动验证所提出方法的有效性.数值结果表明,所提出的含双参数预估校正方法所得到构型场的应力演化的随机误差大幅度下降,应力场时间演化更加平稳.

Based on the micro-macro-coupling model of viscoelastic fluid,a two-parameter predictive correction numerical method for solving Brown’s configuration field equation is proposed. The effectiveness of the proposed method is verified by the start-up of plane Couette flow. The numerical results show that the random error of the stress evolution of the configuration field obtained by the proposed two-parameter prediction correction method is greatly reduced,and the stress field time evolution is more stable.