CFD Analysis of The Stage-Ratio Factor on Savonius Wind Turbine Performance to Optimize Clean-Energy ConversionDandun Mahesa Prabowoputra, Maria Krisnawati, Akhlis Rahman Sari Nurhidayat, Mohammad Khosyi, Ryan Febrian Nur Halim and Haidar ZumaraE3S Web of Conf., 465 (2023) 01007DOI: https://doi.org/10.1051/e3sconf/202346501007