... Wesselingh, J.A., The Maxwell – Stefan approach to mass transfer, Chemical Engineering Science, 52, (1997), 861 – 911 [5] Levenspiel, O., Modeling in chemical engineering, Chemical Engineering ... exist, the computational domain has to be discretized into cells or elements with nodal points marking the boundaries of each cell and combining the physical domain into one computational entity. ... geometry as shown in Figure 3. This model discusses the drying of sludge material and linked to an earlier work presented by Jamaleddine and Mass Transfer in Chemical Engineering Processes 100...