Investigation and modeling of bubble-bubble interaction effect in homogeneous bubbly flows
Investigation and modeling of bubble-bubble interaction effect in homogeneous bubbly flows
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DOI：
10.1063/1.3432503
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发表时间：
2010-06
影响因子：
4.6
通讯作者：
J. Seo;S. Lele;G. Tryggvason
中科院分区：
文献类型：
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作者：
J. Seo;S. Lele;G. Tryggvason
本文采用直接数值模拟和气泡混合模型研究了含气率为0.4%~ 13%的均匀泡状流中气泡-气泡相互作用的影响。结果表明，当含气率大于0（1）%时，气泡-气泡相互作用的影响是显著的，气泡-气泡相互作用的影响使分散激波结构中宏观尺度振荡的振幅和波长减小。为了模拟气泡间的相互作用效应，提出了局部体积平均Rayleigh-Plesset（LVARP）方程，该方程是原Rayleigh-Plesset方程的扩展形式。在含气率为13%的情况下，LVARP泡状混合物模型的计算结果与直接模拟结果吻合较好。本文还研究了初始气泡位置随机的非均匀泡状流中的泡-泡相互作用。结果发现，LVARP模型预测的合奏平均行为与合理的准确性。
The effect of bubble-bubble interaction in homogeneous bubbly flow is investigated by direct numerical simulation and a bubbly mixture model for bubbly shock flows at void fraction 0.4%–13%. It is found that the bubble-bubble interaction effect is significant at void fraction higher than O(1)% and decreases the amplitude and wavelength of the macroscale oscillations in the dispersive shock structure. For the modeling of bubble-bubble interaction effect, the locally volume averaged Rayleigh–Plesset (LVARP) equation, which is an extended version of the original Rayleigh–Plesset equation, is proposed in the present study. The results of bubbly mixture model using LVARP agree well with the direct simulation results for bubbly shock flows at void fraction up to 13%. The bubble-bubble interaction in nonuniform bubbly flows is also investigated in bubbly flows with randomized initial bubble positions. It is found that the LVARP model predicts the ensemble averaged behavior with reasonable accuracy.