Congratulations to Gaute!
Gaute Linga succesfully defended his thesis titled "Fluid Flow Bounded by Complex Interfaces"
Fluid flow near irregular surfaces appear on all scales from the pore scale in rock and man-made materials to atmospheric flow. Gaute Linga’s work focuses on physical models, numerical methods and tools, and applications of the models and methods to problems ranging from the pore to the pipe scale. At the former scale, the thesis considers the coupling between flow and stress in dissolving porous rock and flows where the effects of a second phase, chemical transport, and electric fields, are included. Efficient numerical methods are developed to study both single- and two-phase electrohydrodynamic flow, and a simulation framework, based on a diffuse-interface model, is introduced to simulate wetting at the pore scale. At the scale of pipe flow, the thesis considers the universality class of the laminar–turbulent transition. For that purpose simple particle-based models are developed to mimic the interaction between turbulent domains in an otherwise laminar pipe flow. To illuminate the joint effects of a disordered geometry and fluid inertia on macroscopic transport properties, direct numerical simulations are performed.