Experimental Study of Granular Material Flowability in a Heat ExchangerSamkelo M. Khumalo, Daniel M. Madyira, Waldermar F. Cieslakiewicz, Dewald Scholtz and Garikai T. MarangwandaEPJ Web Conf., 347 (2026) 01005DOI: https://doi.org/10.1051/epjconf/202634701005