Smoothed Particle Hydrodynamics-Based Study of 3D Confined Microflows

In this study, we investigate the performance of smoothed particle hydrodynamics (SPH) method regarding computation confined flows in microchannels. Modeling and numerical simulation with SPH involve representation flowing matter as distinct mass points, leading to discretization Navier–Stokes equations. The computational methodology exhibits similarities other well-established methods, such molecular dynamics (MD), dissipative (DPD), smooth (SDPD). has been extensively tested free-surface flows. However, studies on internal flow computations are limited. work, study microchannels variable cross-sections a weakly compressible formulation. After preliminary straight constant cross-section ducts, focus channels sudden expansion and/or contraction. Flow models based periodic or various inlet/outlet boundary conditions their implementations discussed context 2D 3D simulations. Numerical experiments conducted evaluate accuracy terms flowrate, velocity profiles, wall shear stress. relation between f Re for is computed excellent accuracy. captured characteristics achieved very good Compressibility effects due (WCSPH) formulation negligible considered. Several typical difficulties pitfalls application closed conduits highlighted well some immediate needs method’s improvement.