Airflow analysis around a simplified car model with FEM solver

U ovom radu provedena je numerička analiza protoka oko pojednostavljenog modela automobila. Prvi dio rada predstavlja teorijsku osnovu, a osnovni principi mehanike fluida koji definiraju protok oko tijela opisani su u drugom dijelu. Nakon svega izvedena je numerička simulacija protoka oko Ahmed tijela s prikazanim rezultatima za dva različita rješavača Ansys Fluent i Altair AcuSolve. Izvedeno je ukupno 12 simulacija za 3 različite konfiguracije. Usporedba s eksperimentalnim podacima otkrila je sličnosti i izvrsno slaganje između CFD-a i eksperimenta za određene odjeljke, dok u nekim slučajevima razlike su značajne.In this study a numerical analysis of the flow around the simplified car model is conducted. First part of the thesis presents theoretical basis. Basic principles of fluid mechanics which define the flow around the body are described in second part. Finally, numerical simulation of the flow around the Ahmed body is conducted with results for two distinct solvers Ansys Fluent and Altair Acusolve presented. In total 12 simulations were conducted for 3 different configurations. Comparison with the experimental data revealed similarities and excellent agreement between CFD and experiment for certain sections, whereas in some cases disparities were significant