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arXiv · 1912.07022

Near-surface dynamics of a gas bubble collapsing above a crevice

Theresa Trummler·Spencer H. Bryngelson·Kevin Schmidmayer·Steffen J. Schmidt·Tim Colonius·Nikolaus A. Adams
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Abstract

The impact of a collapsing gas bubble above rigid, notched walls is considered. Such surface crevices and imperfections often function as bubble nucleation sites, and thus have a direct relation to cavitation-induced erosion and damage structures. A generic configuration is investigated numerically using a second-order-accurate compressible multi-component flow solver in a two-dimensional axisymmetric coordinate system. Results show that the crevice geometry has a significant effect on the collapse dynamics, jet formation, subsequent wave dynamics, and interactions. The wall-pressure distribution associated with erosion potential is a direct consequence of development and intensity of these flow phenomena.

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Theresa Trummler, Spencer H. Bryngelson, Kevin Schmidmayer, Steffen J. Schmidt, Tim Colonius, Nikolaus A. Adams. 2019-12-15. Near-surface dynamics of a gas bubble collapsing above a crevice. https://doi.org/10.1017/jfm.2020.432

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