Momentum transfer within a porous medium. II. Stress boundary condition (original) (raw)

This paper focuses on the momentum transfer at the interface between a porous medium and an overlying fluid layer, building on previous works and boundary conditions established in the field. It reviews classical approaches, including Beavers and Joseph's kinematic condition and Neale and Nader's stress balance, while introducing new insights into the behavior of stress at the interface using non-local averaging methods. The findings highlight the variations in effective viscosity dependent on the structure of the porous medium and the implications for both theoretical and practical applications in environmental and industrial contexts.