A multidimensional hydrodynamic code for structure evolution in cosmology

A multidimensional cosmological hydrodynamic code is described and tested. This code is based on modern high-resolution shock-capturing techniques. It can make use of a linear or a parabolic cell reconstruction as well as an approximate Riemann solver. The code has been specifically designed for cosmological applications. Two tests including shocks have been considered: the first is a standard shock tube, and the second involves a spherically symmetric shock. Various additional cosmological tests are also presented. In this way, the code's performance is demonstrated. The usefulness of the code is discussed; in particular, this powerful tool is expected to be useful for studying the evolution of the hot gas component located inside asymmetric cosmological structures.