Development and evaluation of a numerical model for laser-induced liquid jet under the influence of wall elasticity

Abstract

Laser-Induced Liquid Jet (LILJ) is a promising surgical knife because it reserves blood vessel and emits less heat. LILJ is ejected at high speed by shock wave and expansion wave caused by llie pulsed laser focusing. In practice. strong shock and expansion wave bring elastic deformation of the thin tube wall as well. In this study, we try to develop a numerical model to analyze the effect of wall elasticity in jet fomiation. A simple model that can be implemented as a boundary condition into an existing algorithm for two-phase 110w simulation is proposed. The model has been validated in the simulation ofan oscillating high pressure channel with steel and acrv lie walls. The wall displacement and the wall pressure are resolved well with a good spatial and temporal convergence. In the simulation of LILJ based on the elastic wall model, it was found that a low pressure zone ma appear in a short duration in the tube, and the shape of the water jet agrees better with experimental results than that based on the rigid wall model. © 2012 The Japan Society of Mechanical Engineers.