Simulation of Proppant Transport in Fractures with DNS-Derived Drag Correlations
The aim of DNS is not only to understand the influence of the dimensionless numbers, but also to obtain data for developing the needed drag correlation. A drag correlation developed from DNS data using quadratic polynomials and interpolations was incorporated into MFIX. MFIX simulations of particle transport in narrow fractures predicted slower formation of particle sediment layers at the bottom of the fracture compared to default drag laws, because particle-fluid drag is enhanced by the width of fractures. Simulations using the DNS-derived drag correlation can better match experimentally determined sediment layer thickness, compared to those using other drag laws.