Tomasz Dębiński

The paper deals with the speed up of a computer program, which simulates rolling of steel with semi-solid zone. The mathematical models describing the rolling process are fully three dimensional. It leads to very long computation time while the discretization of the problem is made in finite element manner. The main objectives of the contribution are optimization of the program code, as well as making of the first look at possibilities of parallel computation in application to the presented problem. The paper has proved that efficient optimization of the program code can lead to significant shortening of the computation time also with the automatic and manual parallelization. It was concluded that adaptation of the procedures and loops to rigorous requirements of the parallel compiler is strongly recommended.

The paper deals with visualization of results for simulation of a deformation process of a sample with a mushy zone. The numerical model consists of three basic subsystems: the mechanical, thermal and density changes parts. These describe both solid and semisolid deformation states. Taking into consideration their specific distribution graphical visualization is very helpful for understanding the course of the process. Moreover, a three-dimensional presentation is applied in various fields, ranging from medical imaging systems to technological processes assistance to scientific visualizations and entertainment. The stereoscopic imaging technique is still being developed. It is based on the idea of showing each eye the same scene from a bit different perspective. As an effect the illusion of depth is created due to the way the two images are interpreted by the human brain. Stereoscopy is not a new concept, but in the past few years a significant increase in the interest in this method of visualization could be observed. It is caused by computer and audio-visual technology development. In the paper several techniques of creating stereoscopic images are presented together with their physical bases and devices providing such functionality. The use of projection equipment and possibilities of its application to visualization of semi-solid steel deformation is discussed. Apart from that a description of an implementation of OpenGL specification for stereoscopic presentation of computer simulation results is provided.