| Abstract [eng] |
Computational fluid dynamics simulation can be helpful for understanding the heart and blood vessels diseases, fixing changes of blood pressure and flow rate. Nevertheless the computational mechanics applications are highly developed in most areas of engineering, the applications in biomedicine are still challenging due to very complex material properties and multi-physical interactions. During this research, the methods to realize the transient flow processes in blood vessels systems were overviewed, also mathematical model of the flow and 1D finite element implementation for pressure wave propagation were set up. The flow has been analyzed in the cases the vessel was horizontal, tilted up or tilted down. Model was extended for the branched blood vessels structure. In a rough mesh of the sample structure (grid sizes 25, 50 and 100) the solution was imprecise, however, convergence was achieved by using more elements. The level of “numerical noise” was in acceptable limits. The longitudinal wave velocity was compared with the theoretical value, however, exact comparison is hardly possible as the theoretical evaluation fails to account for the damping effects. At small damping values the coincidence of the results was good. MATLAB software was used during this research. |
