On experimental and numerical study of the dynamics of a liquid metal jet hit by a laser pulse
- PDF / 1,918,551 Bytes
- 12 Pages / 595.276 x 790.866 pts Page_size
- 16 Downloads / 196 Views
RESEARCH ARTICLE
On experimental and numerical study of the dynamics of a liquid metal jet hit by a laser pulse Boris Iartsev1 · Ilia Vichev1 · Ilia Tsygvintsev1 · Yuri Sidelnikov2 · Mikhail Krivokorytov2,3 · Viacheslav Medvedev2,3 Received: 23 January 2020 / Revised: 1 April 2020 / Accepted: 2 April 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract In this paper, we present an experimental and numerical study of the laser pulse impact on the liquid metal jet target. The jet motion was recorded with the stroboscopic ultrafast shadow photography. Simulations were carried out in a two-step approach. At the first step, we simulated laser interaction with the target using the radiation hydrodynamics code 3DLINE, which accounts for a number of effects: liquid–gas phase transition, dynamics of ionization, radiation transfer, laser reflection, refraction and absorption. However, this code cannot be used on a deeply refined mesh near the liquid surface and does not account for the surface tension, which strongly affects liquid motion on the microsecond timescale after the laser pulse ends. Therefore, for the second step we employed the OpenFOAM solver, based on the volume-of-fluid method, which overcomes these limitations. The simulated target dynamics is found to be in a fairly good agreement with the experiment. Graphic abstract
* Ilia Vichev [email protected] Extended author information available on the last page of the article
13
Vol.:(0123456789)
119
Page 2 of 12
1 Introduction Liquid jets are inherently unstable. Their breakup has been systematically studied in various conditions (McCarthy and Molloy 1974; Sterling and Sleicher 1975; Bogy 1979; Lin and Lian 1990; Leroux et al. 1996, 1997; Eggers 1997). In atmospheric conditions, the breakup of a cylindrical liquid jet is classically divided into three main categories: Rayleigh breakup, wind-induced breakup and sprays. The latter two mechanisms are caused by the interaction of the jet with a surrounding medium. Under conditions close to a vacuum, these mechanisms become irrelevant. However, in this case, cavitation-induced breakup becomes significant. For instance, a water jet injected into a vacuum becomes superheated due to the rapid drop of the liquid pressure below a critical value (typically the vapor pressure). As a result, nucleation and growth of cavitation bubbles occur leading to a rupture of the jet. In contrast, liquid metal jets (LMJs) are resistant to the cavitationinduced breakup since the vapor pressure of most metals is well below any standard laboratory vacuum. Hence, Rayleigh breakup is the only relevant breakup mechanism in this case. Limiting the LMJ diameter allows to achieve a stable laminar flow. Due to these reasons, it is possible to develop devices providing relatively stable laminar flows of LMJs in a vacuum, which is of interest for various applications. The LMJ finds their application in novel sources of short-wavelength radiation (Hemberg et al. 2003; Jansson et al. 2004; Larsson et al. 2011; Ha
Data Loading...
