The two Laboratories LAPLACE and IFMT join forces on this innovative project in order to remove the locks essential for a better knowledge and therefore use of potential applications aimed at the implementation of plasmas created by electric shock in a liquid. Some of the quantities being difficult to access, and in order to help in the interpretation of the physical mechanisms the two aspects experimentation, modeling will be developed. This subject will lead to the establishment of two doctorates and will benefit from the expertise of researchers from both laboratories. In addition to this favorable environment, a dynamic will be created through days of animation based on the contacts and interests detected in the region. The discharge of an electric arc over short times (100us to a few milliseconds) in a liquid bath can be used in a number of industrial applications (matrix part forming, electrical network protection (HV circuit breakers), rock fracturing for gas extraction). His study is an innovative research topic at the intersection of different disciplines of physics such as plasma physics, fluid mechanics, diphasic thermal transfers.