SUNFLUIDH is a computational software developped by Yann Fraigneau at LIMSI in order to maintain the know-how of the lab in terms of numerical methods development and to be able to respond to the needs of the researchers in the domain of computational fluid dynamics.
A brief description of the computational software is here presented.
More details are provided in the documents that can be downloaded here.
SUNFLUIDH is developped for the simulation of 2D and 3D unsteady incompressible flows or flows under Low Mach number hypothesis. The code covers a large range of flows :
The geometrical configurations mainly rely on a cartesian topology as the mesh is restricted to an orthogonal structured form. It is however possible to define complex geometries by means of immersed bodies which modelize solid parts. Cylindrical geometries are also available.
The Navier-Stokes equations are solved with a usual projection method. The spatial discretization of the governing equations are carried out on a staggered grid (MAC approach). Differents numerical schemes are available. Their accuracy is generally of 2nd order in time and space (a specific numerical scheme based on fourth order compact discretization is also available). The main numerical schemes are listed here :
The projection method implies a Poisson's equation that can be solved with different methods :
This last method can be used for different formulations of the Poisson equation :