• New Manual (freefem++doc.pdf) (@manpdf@). This is a complete rewrite with lots of examples.
• Una documentation es español   freefem++Spanish.pdf (7.3 Mb, 22/05/2010), Thank to Eliseo Chacón Vera (eliseo at us.es)
• INNOVATION : last news.
• HISTORY : life of the software from 2005.
• HISTORY_BEFORE_2005 : life of the software before 2005.
• Old obsolete but shorter version of the full manual still available as manual.pdf (@omanpdf@).

 

News

1/10/2005 Read or participate in general discussions about FreeFEM++ with the FreeFEM++ mailing list

23/9/2005 FreeFem++ and OpenFEM presentation day at IHP (Paris) : details, slides and examples

16/10/2008 Ateliers de Simualtion Numérique, (Setif,Algérie)  : details, par Olivier Pantz

14-15/09/2009 The first tutorial and Workshop on FreeFem++ , held September 14th and 15th, 2009, in Paris at IHP, amphi Hermite ,11 Rue Pierre et Marie Curie. All Presentation, examples, and data are here

1-2/09/2010 The second tutorial and Workshop on FreeFem++ , held September 1st and 2nd, 2010, in Paris at Université Pierre et Marie Curie, Barre 16-15, 3ieme, 4 place Jussieu, Paris All Presentation, examples, and data are here

Some Freefem++ presentation (with useful information):

• A seminar at Departamento de Ecuaciones Diferenciales y Análisis Numérico de la Universidad de Sevilla, Espagne, Jan, 2011 Coarse grid Schwarz DDM parellel solver in FreeFem++ (y ε)
• to install my freefem++ mpi version (3.13-2) on your Mac 10.6 (Snow leopard) See this page .
• A seminar at laga at Villetaneuse, france , jan, 2010 FreeFem++, a tool to solve PDE’s numerically.
• A presentation at MAMERN 09 . at Pau, france , june 11th, 2009, the slide Error indicator and mesh adaption, in FreeFem++ .
• A presentation and all the data files at Finite element fair . Helsinki University of Technology Institute of Mathematics, june 5-6Th 2009 , the zip file : FreeFem++, 3d tools for PDE simulation .
• CIMPA-UNESCO- GUADELOUPE School January, 03-18, 2009, Pointe-à-Pitre, the pdf of my lecture (742Ko) on freefem++ and the archive (.zip) of all the examples (6.2Mo)

• A small movie (340Kb) : Cool air (green) comes from the lower left and mix with hot air (magenta), the right boundary is free. This is Navier-Stokes-Boussinesq integrated with P1-bubblle P1 mixte finite element.

• A very small example 2d of how to solve the Poisson equation on a L shape :

  border aaa(t=0,1){x=t;y=0;}; border bbb(t=0,0.5){x=1;y=t;}; border ccc(t=0,0.5){x=1-t;y=0.5;}; border ddd(t=0.5,1){x=0.5;y=t;}; border eee(t=0.5,1){x=1-t;y=1;}; border fff(t=0,1){x=0;y=1-t;}; mesh Th = buildmesh (aaa(6) + bbb(4) + ccc(4) +ddd(4) + eee(4) + fff(6)); fespace Vh(Th,P1); // to change P1 in P2 to make P2 finite element. Vh u=0,v; func f= 1; func g= 0; int i=0; real error=0.1, coef= 0.1^(1./5.); problem Probem1(u,v,solver=CG,eps=-1.0e-6) = int2d(Th)( dx(u)*dx(v) + dy(u)*dy(v)) + int2d(Th) ( v*f ) + on(aaa,bbb,ccc,ddd,eee,fff,u=g) ; for (i=0;i< 10;i++) { real d = clock(); Probem1; // solve the problem plot(u,Th,wait=1); Th=adaptmesh(Th,u,inquire=1,err=error); error = error * coef; } ;

  Solution on adapted mesh and associated mesh.

• A very small example of how to solve the Stokes equation 3d on cube shape :

  load "msh3" load "medit" // dynamics load tools for 3d. int nn=8; mesh Th2=square(nn,nn); fespace Vh2(Th2,P2); Vh2 ux,uz,p2; int[int] rup=[0,2], rdown=[0,1], rmid=[1,1,2,1,3,1,4,1]; real zmin=0,zmax=1; mesh3 Th=buildlayers(Th2,nn, zbound=[zmin,zmax], reffacemid=rmid, reffaceup = rup, reffacelow = rdown); medit("c10x10x10",Th); // see the 3d mesh with medit software Fe macro Grad(u) [dx(u),dy(u),dz(u)] // EOM macro div(u1,u2,u3) (dx(u1)+dy(u2)+dz(u3)) //EOM VVh [u1,u2,u3,p]; VVh [v1,v2,v3,q]; solve vStokes([u1,u2,u3,p],[v1,v2,v3,q]) = int3d(Th,qforder=3)( Grad(u1)'*Grad(v1) + Grad(u2)'*Grad(v2) + Grad(u3)'*Grad(v3) - div(u1,u2,u3)*q - div(v1,v2,v3)*p + 1e-10*q*p ) + on(2,u1=1.,u2=0,u3=0) + on(1,u1=0,u2=0,u3=0) ; plot(p,wait=1, nbiso=5); // a 3d plot of iso pressure. in progress... march 2009 // to see the 10 cut plan in 2d for(int i=1;i<10;i++) { real yy=i/10.; // compute yy. // do 3d -> 2d interpolation. ux= u1(x,yy,y); uz= u3(x,yy,y); p2= p(x,yy,y); plot([ux,uz],p2,cmm=" cut y = "+yy,wait= 1); }

  Solution on cup plan y=0.5 and mesh 10x10x10 and associated mesh.

• FreeVol: Finite Vol thecnics in freefem for hyperbolic PDEs
• 3D implementation: new solver, new mesh tools, new kind of finite element
• Stabilize and test all // linear solver interface

 

Full List of Downloads

The current version of Freefem++ is @ver@. You can get the latest source from an anonymous Mercurial SCM copy with the following unix shell commands :

hg clone  http://www.freefem.org/ff++/ff++

To install a precompile version of freefem++ with mpi interface freefem++ mpi on your Mac in under version 10.6 (Snow leopard) See this page .

To recompile freefem++ with mpi interface freefem++ mpi under Windows See this page .

Self-contained archives for all other systems :

This directory contains all the different versions of FreeFem.

 

Page written by

Frédéric Hecht et Antoine Le Hyaric

Last modified : @dateofday@