A multiscale study of the boundary layer development for microfluidic system

The evolution and characterisation of the boundary layer are critical in many CFD applications. In microfluidic systems, the performance of microfluidic fuel cells is based on the boundary layer development of two fluid streams. In this article, the Micropolar theory (MPT) is used as a multiscale theory to study the boundary layer development for small scales. Different scale simulations are performed to study the molecule size effect in the boundary layer development. Different boundary conditions for gyration are examined and interpreted as surface roughness for microfluidic systems. Therefore, the effects of surface roughness on the boundary layer growth are explored. The multiscale nature of the MPT is used to study the energy transfer between the two scales in the theory.