Abstract
The work concerns numerical modelling of solidification of castings. Enthalpy formulations were used for mathematical description of solidification. Special attention was paid to the possibility of modelling the structure arising during solidification. The so-called indirect model was used to describe the growth of the solid phase, which allows the created structure to be taken into account in temperature fields calculations. The finite element method was used for numerical solution of the problem. Computer simulations were performed by the use of self-made solvers. One of them works sequentially, which means that, all calculations are performed on a single processor. The other one works in parallel, performing calculations on many processors at the same time. In the parallel version the whole problem is divided into smaller parts, called domains, and solved on particular processors. The parallelisation is the only way of shortening the time of numerical simulations of solidification.