Numerical Modeling of Polydisperse Bubbly Flows by the OpenMP Parallel Algorithm

Abstract

Numerical modeling of gas and liquid flows and, in particular, multiphase mediums, is a promising direction of scientific investigations and development of industrial apparatus. Experimental approach in the field of multiphase flows is not always capable of obtaining required information about the flow structure due to the excessive amount of physical phenomena involved. Numerical simulations of real flows with inclusion of all processes and phenomena or on real-scale geometries are very resource-demanding and are not feasible on stand-alone personal working stations. Thus, applying parallelization techniques at the existing solution algorithms with the means of OpenMP library alongside with supercomputer technologies can reduce computational time and can help with simulations of complex flows on the systems with shared memory.The study presents the description of the previously developed mathematical model of polydisperse multiphase flows, numerical algorithm for the solution of governed equations of the model and description of the numerical method. Simulations by the means of the proposed algorithm were carried out for the case of polydisperse bubbly flow inside water-filled rectangular column. Results presented in the paper, which are obtained during numerical experiments carried out on the “SC Politechnichesky”, comprise of the obtained flow field and bubble distributions and of the dependencies of program working time on the amount of threads and model parameters.