Thermal treatment inside a partially heated triangular cavity filled with casson fluid with an inner cylindrical obstacle via FEM approachZafar Hayat Khan, Muhammad Usman, Waqar Ahmed Khan, Muhammad Hamid and Rizwan Ul HaqEur. Phys. J. Spec. Top., 231 13-14 (2022) 2683-2694DOI: https://doi.org/10.1140/epjs/s11734-022-00587-6