The growing need for sustainable energy solutions has driven research into co-combustion processes, where coal is blended with biomass to reduce emissions and enhance combustion efficiency. This book overviews best practices to optimise the combustion processes through the use of computational fluid dynamics (CFD) simulations, focusing particularly on solid fuel combustion modelling. It equips the reader with an understanding of combustion parameter optimisation and modelling from a thermodynamic-fluid dynamic-mass transfer perspective. Key featuresOffers a specialised approach to solid fuel co-combustion, using CFD to model and optimise combustion processes for sustainable energy solutionsCombines theoretical and practical applications, with a focus on energy optimisation and emissions reductionIncludes modelling of complex phenomena such as multiphase and reaction modellingGives insights into important sub-models required during combustion modelling, forming the basis of reliable modelsContains detailed case studies and real-world applicationsThis book is aimed at graduate students and researchers in thermodynamics, combustion, energy engineering, fluid dynamics, and clean energy processes.