Direct Numerical Simulation (DNS) of mass, momentum and heat transfer in dense fluid-particle systems

Direct Numerical Simulation (DNS) of complex multiphase flows is rapidly gaining attention. In this paper we explain the role of Direct Numerical Simulation (DNS) in the context of a multi-scale approach to model systems involving mass, momentum and heat transfer in dense fluid-particle systems. Following a brief description of the theoretical framework and the associated computational methods we present several illustrative results highlighting the power of DNS to generate detailed closures for fluid-particle interaction. Finally, several future challenges are indicated.