Shock wave focusing in water inside convergent structures


  • C Wang
  • V Eliasson



Experiments on shock focusing in water-filled convergent structures have been performed. A shock wave in water is generated by means of a projectile, launched from a gas gun, which impacts a water-filled convergent structure. Two types of structures have been tested; a bulk material and a thin shell structure. The geometric shape of the convergent structures is given by a logarithmic spiral, and this particular shape is chosen because it maximizes the amount of energy reaching the focal region. High-speed schlieren photography is used to visualize the shock dynamics during the focusing event. Results show that the fluid-structure interaction between the thin shell structure and the shock wave in the water is different from that of a bulk structure; multiple reflections of the shock wave inside the thin shell are reflected back into the water, thus creating a wave train, which is not observed for shock focusing in a bulk material.


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How to Cite

Wang, C. and Eliasson, V. (2012) “Shock wave focusing in water inside convergent structures”, The International Journal of Multiphysics, 6(3), pp. 267-282. doi: 10.1260/1750-9548.6.3.267.