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基于有限体积法采用雷诺应力湍流模型并结合Cross本构方程模拟研究了高分子对Rayleigh-Bénard对流在软(Ra=5×105～4×107)、硬(Ra>4×107)湍流区热输运的影响。模拟结果显示:添加高分子可加强湍流Rayleigh-Bénard对流热输运,相对于软湍流区在硬湍流区的有效作用范围较大;相应地大尺度环流也随之充满整个腔体,封闭腔体内对角线上两个对称小涡也随着高分子浓度和Ra数的增加而减小。
Based on the finite volume method and the Reynolds stress turbulence model and the Cross constitutive equation simulation, the effects of polymer on the Rayleigh-Bénard convection in soft (Ra = 5 × 105 ~ 4 × 107) and hard (Ra> 4 × 107) The impact of transport. The simulation results show that the addition of polymer can enhance the convective heat transport of turbulent Rayleigh-Bénard turbulent flow, and the effective range of turbulent flow is larger than that of soft turbulent flow. Correspondingly, the large-scale circulation also fills the whole cavity, The two symmetric vortices on the diagonal also decrease with the increase of polymer concentration and Ra number.