  An effective computer program for three dimensional relativistic
hydrodynamical model has been developed. It implements a new approach to the
early hot phase of relativistic heavy-ion collisions. The computer program
simulates time-space evolution of nuclear matter in terms of ideal-fluid
dynamics. Equations of motions of hydrodynamics are solved making use of finite
difference methods. Commonly-used algorithms of numerical relativistic
hydrodynamics RHLLE and MUSTA-FORCE have been applied in simulations. To
speed-up calculations, parallel processing has been made available for solving
hydrodynamical equations. The test results of simulations for 3D, 2D and
Bjorken expansion are reported in this paper. As a next step we plan to
implement the hadronization algorithm by implementing the continuous particle
emission for freeze-out and comparing it with Cooper-Frye formula.
