Direct Numerical Simulations of Flows with Phase Change

Direct numerical simulations of flows with phase change

We present results from direct numerical simulations of two types of technologically important phase change processes: directional solidification of a binary alloy and film boiling. We use a two-dimensional finite-difference/front-tracking method which allows us to accurately follow the evolution of the interface between the phases. The method is general in the sense that discontinuities in mat...

Parallel Wavelet-adaptive Direct Numerical Simulation of Multiphase Flows with Phase-change

Numerical Simulations of Phase Change in Microgravity

Direct numerical simulations of liquid-solid and liquid-vapor phase change are conducted under microgravity conditions. The time-dependent governing equations are solved using a two-dimensional nitedi erence/front-tracking method. Large interface deformations, topology change, latent heat, surface tension and unequal material properties between the phases are included in the simulations. Result...

Direct Numerical Simulations of Gas-Liquid Multiphase Flows

High performance Python for direct numerical simulations of turbulent flows

Direct Numerical Simulations (DNS) of the Navier Stokes equations is an invaluable research tool in fluid dynamics. Still, there are few publicly available research codes and, due to the heavy number crunching implied, available codes are usually written in low-level languages such as C/C++ or Fortran. In this paper we describe a pure scientific Python pseudo-spectral DNS code that nearly match...