Phys. Rev. Lett. 90, 126105 (2003) [4 pages]Reverse Undercompressive Shock Structures in Driven Thin Film FlowReceived 6 June 2002; published 26 March 2003 We show experimental and computational evidence of a new structure: an undercompressive and reverse undercompressive shock for draining films driven by a surface tension gradient against gravity. The reverse undercompressive shock is unstable to transverse perturbations while the leading undercompressive shock is stable. Depending on the pinch-off film thickness, as controlled by the meniscus, either a trailing rarefaction wave or a compressive shock separates from the reverse undercompressive shock. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.90.126105
DOI:
10.1103/PhysRevLett.90.126105
PACS:
68.15.+e, 47.10.+g, 47.20.Ma, 68.08.Bc
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