Rapid development of urban areas dramatically increases an energy demand. In order to respond to this fact and to ensure a proper diversification of its sources, renewable energy seems to be a reasonable solution. Savonius wind turbine meets all of the above expectations, while having unique features, contributing to its superiority over the commonly used turbines with a horizontal axis of rotation. The aim of this study was to develop a physical representation of the flow in the Savonius wind turbine, allowing to precisely compare alternative projects in terms of parameters of their work....