Genesis:: A high-resolution code for three-dimensional relativistic hydrodynamics

The main features of a three-dimensional, high-resolution special relativistic hydro code based on relativistic Riemann solvers are described. The capabilities and performance of the code are discussed. In particular, we present the results of extensive test calculations that demonstrate that the code can accurately and efficiently handle strong shocks in three spatial dimensions. Results of the performance of the code on single and multiprocessor machines are given. Simulations (in double precision) with less than or equal to 7 x 10(6) computational cells require less than 1 Gbyte of RAM memory and approximate to 7 x 10(-5) CPU s per zone and time step (on a SCI Gray-Origin 2000 with a R10000 processor). Currently, a version of the numerical code is under development, which is suited for massively parallel computers with distributed memory architecture (such as, e.g., Cray T3E).