The paper deals with the theoretical foundations of laminar and turbulent fluid flows ina boundary layer and the effects of wind on constructions. The application sectiondescribes the flow of compressible Newtonian fluid as a system of partial differentialequations (the Navier-Stokes equation) and solves these equations using FEM at each timestep. Simplifying a 3D task to a plane problem and ignoring vorticity allows for theformulation of a wind flow on an open terrain and the effects of wind on a barrier. Twoapproaches to the numerical solution of wind flows are presented: one involves the Fluentcommercial program to obtain the velocity field and pressure at a constant wind speed inan inlet region, and the other approach involves the development of the SIXIS specificsoftware program for the purpose of this thesis, which modifies the wind velocity profileaccording to EN 1994-1-4. The results obtained - velocity fields around obstacles and thewind pressure coefficients on a barrier are processed and compared in a table.
