Implementation of Mass Transfer Model on Parallel Computational System

At present, parallel computational systems are being used more often for implementation of solutions of many phenomena. One of such phenomena is the mass transfer from one location to another that occurs in many porous building materials and the knowledge about this transfer is significant at least in civil engineering practice. In this paper, we consider a complex mass transfer diffusion model that involves beside water and water vapor, the air presence, and moreover, the phase transition of water to vapor or vice versa. The model was developed recently and its exact solution was found. In this paper, our intention is to implement this exact solution of the model on the parallel computational system HybriLIT. We suggest the sequential and parallel CUDA algorithms for the implementation of the solution. Thus, the speed-up of the parallel implementation is obtained and compared to the sequential implementation as a ratio of 44 s for sequential and 0.004 s for parallel implementation. GPU capacity is compared with total capacity used for problem solution on the sequential level. Input parameters of the problem are found so that the GPU capacity limits are reached.