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The recent Worldwide Harmonized Light Vehicles Test Procedure (WLTP) requirements have introduced additional challenges in the car development phase. Continuous demand for environmentally friendly road vehicles has lead all OEMs to minutely investigate any potential feature that could reduce C02 emissions. Comprehension of the aerodynamics of wheels, which are one of the least explored areas, can bring novel solutions for future car designs. As the capacity of experimental facilities is limited, the need for reliable CFD methods has become crucially important. Although computational resources are continuously growing, the number of CFD simulations is increasing even faster. Professionally supported CFD process based on open-source technology has recently become an appealing alternative to commercial codes.