Interaction and fragmentation of pulsed laser induced microbubbles in a narrow gap
Interaction and fragmentation of pulsed laser induced microbubbles in a narrow gap
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DOI：
10.1103/physrevlett.96.034505
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发表时间：
2006-01-27
影响因子：
8.6
通讯作者：
I, L
中科院分区：
文献类型：
--
作者：
Chen, YH;Chu, HY;I, L
研究了在两块玻璃薄片之间的薄墨片中，一个稳定的微泡B-1和另一个激光诱导的邻近膨胀的微泡B-2的相互作用动力学。快速膨胀的B-2导致B-1的各向异性压缩，并具有向前穿透的射流。在B-1的后续膨胀阶段，与射流突出到B-1的相对边缘相关的气体和不均匀的周围流场诱导颈缩，并从旁瓣横向向内喷射，其进一步与轴向射流相互作用并导致最终破碎成较小的气泡。在较小的气泡间距下，B-1的后向相互作用首先导致膨胀的B-2的尖极，然后在其坍缩过程中导致后向喷射。强相互作用可以使两个气泡以复杂的非对称中介模式融合。
We investigate the interaction dynamics of an existing stable microbubble B-1 and another laser induced nearby expanding microbubble B-2 in a thin ink sheet between two glass slices. The fast expanding B-2 causes anistropic compression of B-1 with a forward penetrating jet. In the subsequent expansion stage of B-1, the gas associated with jet protrusion to the opposite edge of B-1 and the nonuniform surrounding flow field induce necking with transverse inward jetting from the side lobes, which further interact with the axial jet and lead to the final fragmentation into smaller bubbles. At small interbubble distance, the backward interaction from B-1 first leads to the pointed pole of the expanding B-2 and then a backward jetting during its collapsing. The strong interaction can merge the two bubbles with complicated asymmetric intermediated patterns.