Athanasios Nenes
ChBE Faculty Profile  •  EAS Faculty Profile

Athanasios Nenes' research interests often necessitate the numerical solution of complex fluid flows (both single and two phase). Examples of problems solved were the simulation and design of instrumentation used to measure cloud condensation nuclei (CCN), instrumentation used for measuring ambient particle size distributions, silicon nanoparticle deposition chamber for nonvolatile memory devices, two-phase batch sedimentation, aeration tank design, airlift pump design, flows of viscoelastic fluids, simulations of solidification/freezing processes and two-phase mass transfer across distillation plates. The solvers and the graphical post-processors developed have evolved to a fairly capable CFD package. (Representative samples of this work can be found at here.)

All of the codes numerically solve the Navier-Stokes equations by using a finite volume descretization formulation. A hybrid upwind-central differencing scheme is used for calculating the convective-diffusive fluxes over each cell of the computational grid. A staggered grid is used for representation of the velocity and scalar fields. The hydrodynamic equations for single-phase flows are solved using the Semi-Implicit Method for Pressure-Linked Equations, while the corresponding cycle for two-phase flows is solved by using the Interspersed Phase Solution Algorithm. The codes are capable of solving turbulent and laminar flows.

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