Laminar dispersion at low and high Peclet numbers in finite-length patterned microtubes

摘要: Laminar dispersion of solutes in finite-length patterned microtubes is investigated at values the Reynolds number below unity. Dispersion strongly influenced by axial flow variations caused patterns periodic pillars and gaps direction. We focus on Cassie-Baxter state, where are filled with air pockets, therefore enforcing free-slip boundary conditions flat liquid-air interface. The analysis approached considering temporal moments solute concentration. Based this approach, we investigate properties a wide range Peclet number, thus gaining insight into how structure microtube influences both Taylor-Aris convection-dominated regimes. Numerical results for velocity field moment hierarchy obtained means finite element method solution corresponding transport equations. show that different geometries, ...