Welcome to the collection of free CFD codes!

Free CFD Source Codes

Collection of Computation Fluid Dynamics (CFD) source codes, freely downloadable and intended to be useful for educational purposes.

Hyperbolic and parabolic model equations

Schemes for model equations
C codes that implement conservative difference schemes, explicit and implicit, for hyperbolic and parabolic model equations in 1D - modeq.tar.gz

FCT-schemes
Sample C/C++ codes that implement some FCT schemes for hyperbolic model equations in 1D - fct.tar.gz

One-dimensional conservation laws of gas dynamics
First order Godunov schemes
Piecewise-constant approximation to the solution within computational cells, single step advancing in time. Several source codes in ANSI C with different solvers of the Riemann problem are available:
- exact procedure of Godunov - godunov.tar.gz
- approximate flux-difference splitting (FDS) of Roe - roe_fds.tar.gz
- approximate linearized characteristic-based Riemann solver (LCS): lcs.tar.gz - (Fortran 77 and C sources available). Description of LCS solver downloadable as gzipped PS file - solver.ps.gz
Higher order Godunov-type schemes
Piecewise-parabolic spatial reconstruction, minmod() limiter function, LCS solver, three- and two- step Runge-Kutta in time. Sources in C are available for:
- Two- and three-step schemes that use non-iterative (LCS), iterative (LCSS), and weakly linearized (WLCS) versions of characteristic-based Riemann solver and a program for exact solution of Riemann problem: lcs3.tar.gz
- Two-step scheme for variable composition mixture of gases: lcs2mix.tar.gz
A set of different 1D schemes; demo package

Four different schemes solving "subsonic" and "supersonic" Riemann problems, with numerical and exact solutions
compared - sch1d.tar.gz. This package contains:
    1) a non-conservative characteristic-based scheme,
    2) Godunov scheme (as in godunov.tar.gz),
    3) three step higher-order scheme (as in lcs3.tar.gz),
    4) one-step higher-order scheme.

Two-dimensional conservation laws of gas dynamics

Higher order Godunov-type "generic" 2D scheme

Rectangular mesh, piecewise-parabolic spatial reconstruction, minmod() limiter function, characteristic-based solver LCS, three step Runge-Kutta in time. C source - lcs2d3.tar.gz

Higher order scheme for 2D equations in axisymmetrical form

Higher order Godunov-type scheme applied to aeroacoustical problem: a finite-amplitude wave issuing from 1D duct into the 2D atmosphere. Standard C source code - noise.tar.gz

Large Eddy Simulation
Cartesian grid compressible LES
Piecewise-parabolic distribution within computational cells, two-step time integration, 3D, unsteady filtered Navier-Stokes equations.
Description of LES numerical scheme downloadable as gzipped PS file - les.ps.gz.
Test examples in C are available for:
- LES of turbulent mixing layer - layer2.tar.gz.
- LES of turbulent flow in square duct - duct.tar.gz.
High performance LES
Parallel implementation of LES of turbulent flows (uses MPI):
- LES of nonisothermal turbulent jet - mpi_tjet.tar.gz. Sample computed and animated flowfield - tjet.html.
- LES of turbulent flow in square duct - mpi_duct.tar.gz. Computed and animated flowfield - duct.html.
- LES of turbulent jet in coflowing stream - mpi_jet.tar.gz. Animated flowfield - jet.html.
- LES of turbulent mixing layer - mpi_layer2.tar.gz. Animation - layer.html.

Combustion

Propagation of 1D pre-mixed laminar (normal) flame
Numerical scheme for 1D normal premixed combustion based on above listed high-resolution Godunov scheme lcs2mix. C source code - normal.tar.gz

Flow Visualization

WinField 1.07
Visualization of scalar flowfield given by rectangular table. Win32 binary and C source - winfield.zip

This page is permanently under construction
Look at my personal page
Please e-mail any comments to: [email protected]

Last updated: October 14, 2002
URL: http://www.geocities.com/andrei_chernousov/freecfd.htm
Back to home page

Hosted by www.Geocities.ws