The session is intended for the presentation of those works that involve the resolution of fluid flow and/or transport in non-homogeneous media or systems. Generally, these non-homogeneities occur on a micrometric scale, and as examples we can mention porous media, microdroplets, microemulsions or heterogeneities due to accumulation of electrical charges in solution, among others. Two of the intrinsic characteristics of the physical systems mentioned are the laminar fluid flow regimes or at very low Reynolds number, and in the case of mass transport, the high Peclet number. Among the applications that we understand a priori that may be integrated into this session we can include: Microfluidics on paper, Studies of microdroplets and microemulsions, Transport in artificial biological media, Transport of biomolecules in micro and nanostructured spaces, Transport in soils and aquifers, Lubrication flow.