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: andrei99@iname.com

---

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