N2 - The paper presents key assumptions of the mathematical model which describes heat and mass transfer phenomena in a solar sewage drying process, as well as techniques used for solving this model with the Fluent computational fluid dynamics (CFD) software. Special attention was paid to implementation of boundary conditions on the sludge surface, which is a physical boundary between the gaseous phase - air, and solid phase - dried matter. Those conditions allow to model heat and mass transfer between the media during first and second drying stages. Selection of the computational geometry is also discussed - it is a fragment of the entire drying facility. Selected modelling results are presented in the final part of the paper. L1 - http://journals.pan.pl/Content/94275/PDF/01_paper.pdf L2 - http://journals.pan.pl/Content/94275 PY - 2011 IS - No 4 December EP - 16 DO - 10.2478/v10173-011-0028-y KW - heat and mass transfer KW - CFD KW - Sewage sludge drying A1 - Krawczyk, Piotr A1 - Badyda, Krzysztof PB - The Committee of Thermodynamics and Combustion of the Polish Academy of Sciences and The Institute of Fluid-Flow Machinery Polish Academy of Sciences DA - 2011 T1 - Two-dimensional CFD modeling of the heat and mass transfer process during sewage sludge drying in a solar dryer SP - 3 UR - http://journals.pan.pl/dlibra/publication/edition/94275 T2 - Archives of Thermodynamics