Computational modelling of superheated steam drying of compacted distillers’ spent grain coated with solubles

•Superheated steam is a suitable drying medium for drying wet spent grain.•Use of drying nuclei for drying wet paste over dry core.•Temporal and spatial variation of moisture and temperature of multilayer pellet.•Coupling diffusion models and Reynolds-Average Navier–Stokes and energy equations.