20.500.12556/DKUM-79793 Validacija numeričnih orodij za aerodinamiko poenostavljenega avtomobila diplomsko delo Validation of Numerical Tools for Bluff Body Aerodynamics V diplomskem delu sem predstavil validacijo numeričnih orodij na primeru aerodinamike poenostavljenega vozila. Primerjal sem tri programe za računalniško dinamiko tekočin: Ansys CFX, Simscale in DualSPHysics. Na začetku na kratko predstavim osnovno problematiko aerodinamike vozil in zapišem nekaj osnovnih principov o numeričnih metodah. Nato opišem geometrijo, robne pogoje in nastavitve simulacij v vseh treh programih. Rezultate sem primerjal z eksperimentalnimi rezultati iz članka »Some Salient Features of the Time - Averaged Ground Vehicle Wake«. Analiziral sem natančnost rezultatov v odvisnosti od gostote računskih mrež. Glavni parameter po katerih sem ovrednotil rezultate je bil koeficient upora, poleg tega sem opazoval še hitrostna in tlačna polja. The diploma thesis presents validation of numerical tools on the example of bluff body aerodynamics. I compared three programs for computational fluid dynamics: Ansys CFX, Simscale and DualSPHysics. At the beginning, I briefly present the basic problems of vehicle aerodynamics and discuss some basic principles about numerical methods. I then describe the geometry, boundary conditions, and simulation settings in all three programs. I compared the results with the experimental results from the article "Some Salient Features of the Time - Averaged Ground Vehicle Wake". I observed how the accuracy of the results changes with mesh refinement. The main parameter by which I evaluated the results was the drag coefficient. I also observed velocity and pressure fields. Validacija računalniška dinamika tekočin aerodinamika Ahmed body koeficient upora Validation computational fluid dynamics aerodynamics Ahmed body drag coefficient true true false [Ž. Ogorevc] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2021-08-17 19:07:38 2021-09-24 10:47:40 2022-08-09 22:03:40 0000-00-00 00:00:00 2021 0 Maribor 0 Maribor VIII, 38 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 629.3.015.3(043.2) 85153283 UN_Ogorevc_Zan_2021.pdf UN_Ogorevc_Zan_2021.pdf 1 88F6A58B81024B5633A30DD0566CF1A8 75e3ce0bd15471f42230a036b2438703f34886c1517a57bbe63e1336283da1d2 3d03681d-0c04-11ec-a776-00155d581298 20.500.12556/dkum/52315f8d-14bd-481d-b6ca-43efcda52e8c https://dk.um.si/Dokument.php?lang=slv&id=152971 Fakulteta za strojništvo 0 0 0