AI 中文总结
通过DNS模拟发现，气泡诱导湍流的K41标度源于单气泡尾迹的叠加，推导的稀BIT耗散率标度与实验结果一致。
AI 中文摘要
我们采用高分辨率、界面解析的直接数值模拟（DNS），研究气泡诱导湍流（BIT）中柯尔莫哥洛夫（K41）标度的起源。分区域速度结构函数显示，2/3标度仅出现在气泡尾迹区域。与匹配的单气泡DNS对比进一步表明，全BIT场中观测到的K41标度源于单个气泡尾迹的叠加。在此基础上，我们推导了稀BIT中耗散率的标度，该标度与文献中的实验结果一致。
英文摘要
We use high-resolution, interface-resolved direct numerical simulations (DNS) to investigate the origin of Kolmogorov (K41) scaling in bubble-induced turbulence (BIT). Region-wise velocity structure functions show that the 2/3 scaling appears only within bubble wake regions. Comparison with matched single-bubble DNS further indicates that the K41 scaling observed in the full BIT field arises from the superposition of individual bubble wakes. On this basis, we derive a scaling for the dissipation rate in dilute BIT that is consistent with experimental results from the literature.
