A semi implicit compressible solver for two-phase flows of real fluids

Parallel monolithic implicit solver for compressible flows

This paper introduces a monolithic compressible flow implicit scheme, capable of scaling up to a few thousand processors. The scheme is programmed in Alya, the BSC in-house code for simulating multiphysics problems in supercomputers [1,2,3]. It is monolithic, assembling a global matrix for the delta form of the conservative unknowns linear momentum, density and total energy and solving the resu...

An efficient semi-implicit compressible solver for large-eddy simulations

In most combustion devices, the Mach number is small, and the most efficient computational approach is the solving of the low-Mach number formulation of the Navier-Stokes equations. In this approach, the acoustic waves propagate at an infinite speed. Nevertheless, when the acoustic speed plays an important role, as in the formation of instabilities, the compressible Navier-Stokes equations must...

A Scalable Fully Implicit Compressible Euler Solver for Mesoscale Nonhydrostatic Simulation of Atmospheric Flows

A fully implicit solver is developed for the mesoscale nonhydrostatic simulation of atmospheric flows governed by the compressible Euler equations. To spatially discretize the Euler equations on a height-based terrain-following mesh, we apply a cell-centered finite volume scheme, in which an AUSM-up method with a piecewise linear reconstruction is employed to achieve secondorder accuracy for th...

A Two -Step Modification toward Implementing Compressible Source Terms in Low Compressible Flows

An implicit compact scheme solver for two-dimensional multicomponent flows

A 2D implicit compact scheme solver has been implemented for the vorticity–velocity formulation in the case of nonreacting, multicomponent, axisymmetric, low Mach number flows. To stabilize the discrete boundary value problem, two sets of boundary closures are introduced to couple the velocity and vorticity fields. A Newton solver is used for solving steady-state and time-dependent equations. I...