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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
<meta http-equiv="Content-type" content="text/html; charset=utf-8">
<head>
<meta http-equiv="Content-Type" content="text/html; charset==utf-8"">
<meta name="Description" content="FreeFem++ is a language that allows
the resolution of partial differential equation using the finite
element method">
<meta name="Keywords" content="language, c++, Multi-platform, free
software, Navier-Stokes, elasticity, convection-diffusion, heat
equation, linear elliptic PDE's",MPI,"Scientific computing">
<title>Freefem++ Home Page (20-janvier-2010)</title>
<!-- SUMMARY: -->
<!-- AUTHOR: Frederic hecht & Antoine Le Hyaric -->
<!-- ORG: -->
<!-- ORIG-DATE: 23 nov 2001 -->
<!-- DESCRIPTION: -->
<!-- DESCRIP-END. -->
<link href="mailto:[email protected]" rev="Author">
</head>
<body text="#14277D" bgcolor="#FFFFFF" link="#9026D0" vlink="#609F98"
alink="#F0000F">
<!-- ---------------------------------------------------------------------- -->
<center><table WIDTH="500" BACKGROUND="@[email protected]" ><tr>
<td ALIGN=center><font color="#0000FF"><font size=+3>FreeFem++ version
@ver@ (2d and 3d) </font></td>
</tr></table></center>
<center><table BORDER=0 WIDTH="600"><tr>
<td ALIGN=center><a href="http://www.upmc.fr">Université Pierre
et Marie Curie</a> <a href="http://www.ann.jussieu.fr">Laboratoire
Jacques-Louis Lions</a></td>
</table>
Financé par l'<a href="http://www-anr-ci.cea.fr" target="main">ANR</A>
/ <a href="http://www.freefem.org/ff2a3/" target="main">FF2A3</A>, Réf. : ANR-07-CIS7-002-01
</center>
<p ALIGN=center>FreeFem++ team :
<font color="#FF0000"><a href="http://www.ann.jussieu.fr/~pironnea">Olivier Pironneau</a></font>,
<font color="#FF0000"><a href="http://www.ann.jussieu.fr/~hecht">Frédéric Hecht</a></font>,
<font color="#FF0000"><a href="http://www.ann.jussieu.fr/~lehyaric">Antoine Le Hyaric</a></font>,
<font> Jacques Morice </font>,
<p ALIGN=center>Please send questions, comments and bug reports to <a
href="mailto:[email protected]">Frédéric Hecht</a> or
to the <a
href="http://www.ann.jussieu.fr/mailman/listinfo/freefempp">FreeFem++
mailing list</a>.
<p>
<!-- ---------------------------------------------------------------------- -->
<table WIDTH="500" BACKGROUND="@[email protected]" ><tr>
<td><font color="#0000FF"><font size=+1>Introduction</font></td>
</tr></table>
<p>
<table><tr>
<td><img src="@[email protected]"></td>
<td><b>FreeFem++</b> is
an implementation of a language dedicated to the finite element
method. It enables you to solve Partial Differential Equations (PDE)
easily.
<p>Problems involving PDE (2d, 3d) from several branches of physics such as
fluid-structure interactions require interpolations of data on several
meshes and their manipulation within one program. FreeFem++ includes a
fast 2^d-tree-based interpolation algorithm and a language for the
manipulation of data on multiple meshes (as a follow up of <a
href="http://www-rocq.inria.fr/gamma/cdrom/www/freefem/../bamg/eng.htm">bamg</a>).
<p>FreeFem++ is written in C++ and the FreeFem++ language is a C++
idiom. It runs on any <b>Unix</b>-like OS (with g++ version 3 or
higher, X11R6 or OpenGL with GLUT) Linux, FreeBSD, <b>Solaris 10</b>, Microsoft <b>Windows</b> (
2000, NT, XP, Vista,7 ) and <b>MacOS X</b> (native version using
OpenGL). FreeFem++ replaces the older <a
href="freefem/fraold.htm">freefem</a> and <a
href="freefem/frap.htm">freefem+</a>. </td>
</tr></table>
<p>
<!-- ---------------------------------------------------------------------- -->
<table WIDTH="500" BACKGROUND="@[email protected]" ><tr>
<td><font color="#0000FF"><font size=+1>Quick Start</font></td>
</tr></table>
<p>
<p> <font size=+1> The
<A href="http://www.ann.jussieu.fr/~lehyaric/ffcs/index.htm"> <tt> FreeFem++-cs </tt> (IDE: an integrated development environment) </A>
by <A href="http://www.ann.jussieu.fr/~lehyaric"> Antoine Le Hyaric </A> is a excellent tool to develop FreeFem++ scripts.</font>
</p><p> </p>
<table width=100% bgcolor=black><tr><td>
<table width=100% bgcolor=white>
<!-- titles -->
<tr align=center>
<td><b><u>Unix</u></b> <br> Linux, FreeBSD, ... </Td>
<td><b><u>Windows</u></b><br> 98, NT, 2000, XP</td>
<td><b><u>MacOS X</u></b><br>Universal ( 10.3 to 10.6 ) <br> <A HREF="#macmpi10.7">Note the Freefem++.app do not run on 10.7 </></td>
<td><b><u>Documentation</u></b></td>
<!--
<td><b><u>Online Demonstration</u></b></td>
-->
</tr>
<!-- space -->
<tr><td><p> </td></tr>
<!-- links -->
<tr align=center>
<td>Download <a href="@quickstartlinux@">this sources archive</a>,
<br>decompress, compile;</td>
<td>Download <a href="@quickstartwindows@">this EXE</a> <br>and
run it</td>
<td>Download <br> <a href="@quickstartmacosx@"> Universal (Intel, G3)</a>,<br>
decompress, install (see INSTALL-MacOSX) </td>
<td>Full documentation :<br><a
href="@dir@/freefem++doc.pdf">freefem++doc.pdf</a></td>
<!--
<td>Try FreeFem++ online at : <br><a
href="http://titi.ann.jussieu.fr">LJLL Software Online</a></td>
-->
</tr>
</tr>
<!-- space -->
<tr><td><p> </td></tr>
<!-- links -->
<tr align=center>
<td> , install and run</td>
<td></td>
<td> <A HREF="#mac10.6"> for Snow Leopard version (10.6) </A> with
<A HREF="#macmpi"> with mpi </A>,
<A HREF="#macmpi10.7"> with mpi </A></td>
<td></td>
<!--
<td></td>
-->
</tr>
</table>
</td></tr></table><lu>
<p>
<!-- <img src="freefem/new.gif"> <font color="#0000FF" >
<li> I have built a precompiled version on ubuntu 32bits,
to install do under root in /usr/local (with openmpi )
<br><font color="#000000" ><tt>tar zxvf freefem++-v3.5-1-ubuntu.tar.gz -C /
</tt></font>
<br> If some lib is missing, use the -k option (existing files are kept missing ones are
installed in /usr/lib):
<br><font color="#000000" ><tt>tar zxvf freefem++-v3.2-usr-lib.tar.gz -C / -k
<br> </font>
---------------------------------------------------------------------- -->
<!--
<li> Bug under UBUNTU/GLUT: <font color="#FF0000" >missing graphics window title</font> , problem with compiz package
and freeglut, you can try to kill compiz with
<br><font color="#000000" >killall compiz.real && killall compiz && metacity --replace --display :0 &</font>
<br>or To disable/enable it graphically, install the compiz-swith package with synaptic.</font><p>
-->
<li>To compile FreeFem++, go into the FreeFem++ directory and
type :
<br><tt>./configure --enable-download</tt>
<br><tt>make</tt>
<br><tt>make install</tt> (as root).
<p>
<li>For all other platforms and versions, please refer to the <a
href="#download">full list of downloads</a>.
</ul>
<p>
<!-- ----------------------------------------------------------------------
<table WIDTH="500" BACKGROUND="@[email protected]" ><tr>
<td><font color="#0000FF"><font size=+1>Documentation</font></td>
</tr></table>
<p>
<table width=500 align=center><tr>
<td><img align=left src="@[email protected]" border=1></td>
<td>To receive the manual of FreeFem++ 2.21 in book
form, send three blank DVDs and your postal address to :
<p>Dr FREEFEM++
<br>Laboratoire JL Lions
<br>University of Paris VI
<br>175 rue du Chevaleret
<br>75013 Paris France
<p><font color=red>A Sorry thys edition of the book is not available </font>
</td>
</tr></table>
-->
<p>
<ul>
<li><a
href="@dir@/freefem++doc.pdf">New Manual (freefem++doc.pdf)</a>
(@manpdf@). This is a complete rewrite with lots of examples.
<li><img src="freefem/new.gif"> Una documentation es español
<a href="@dir@/freefem++Spanish.pdf">freefem++Spanish.pdf</a> (7.3 Mb, 22/05/2010), Thank to Eliseo Chacón Vera (eliseo at us.es) </li>
<li><a href="@dir@/INNOVATION">INNOVATION<a/> : last news.
<li><a href="@dir@/HISTORY">HISTORY<a/> : life of the software
from 2005.
<li><a href="@dir@/HISTORY_BEFORE_2005">HISTORY_BEFORE_2005<a/> : life
of the software before 2005.
<li>Old obsolete but shorter version of the full manual still available as <a
href="@dir@/manual.pdf">manual.pdf</a> (@omanpdf@).
</ul>
<p>
<!-- ---------------------------------------------------------------------- -->
<table WIDTH="500" BACKGROUND="@[email protected]" ><tr>
<td><font color="#0000FF"><font size=+1>News</font></td>
</tr></table>
<p><b>1/10/2005</b> Read or participate in general discussions about
FreeFEM++ with the <a
href="http://www.ann.jussieu.fr/mailman/listinfo/freefempp">FreeFEM++
mailing list</a>
<p><b>23/9/2005</b> FreeFem++ and OpenFEM presentation day at IHP
(Paris) : <a
href="http://www.cmap.polytechnique.fr/~allaire/gamni/fem.html">details</a>,
<a href="Journee-Gamni-2005">slides and examples</a>
<p><b>16/10/2008</b> Ateliers de Simualtion Numérique, (Setif,Algérie)
: <a
href="http://www.cmap.polytechnique.fr/spip.php?article239"> details</a>, par
<a href="http://www.cmap.polytechnique.fr/spip.php?article105"> Olivier Pantz </a>
<p><b>14-15/09/2009</b></b>
<font color=black> 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.</font>
<A HREF="http://www.ann.jussieu.fr/~hecht/ftp/ff++days"> All Presentation, examples, and data are here </A>
</p>
<p><b>1-2/09/2010</b>
<font >
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</font>
<A HREF="http://www.freefem.org/ff2a3/ff++days-2010/"> All Presentation, examples, and data are here </A>
<p><b>5-7/12/2011</b><font color=purple size=+2> <bf>
<A HREF="http://www.ljll.math.upmc.fr/FreeFem++">
The THIRD tutorial and Workshop on FreeFem++ </A>,
in Paris at Université Pierre
et Marie Curie, Barre 16-15, 3ieme, 4 place Jussieu, Paris</bf>
<A HREF="http://www.ljll.math.upmc.fr/~hecht/ftp/ff++days/2011/index.htm"> All Infomation are here </li>
</font>
<p><p><p><b>Some Freefem++ presentation (with useful information):<img src="freefem/new.gif"> </b>
<ul>
<li>
A seminar at <A HREF="http:http://departamento.us.es/edan/"> Departamento de Ecuaciones Diferenciales y Análisis Numérico
</A> de la Universidad de Sevilla, Espagne, Jan, 2011 <A HREF="http://www.ljll.math.upmc.fr/~hecht/ftp/FF-conf/FF-Seville-2011-MPI-Schwarz-DDM.zip"> Coarse grid Schwarz DDM parellel solver in FreeFem++ (y ε) </A> </li>
<li>to install
my freefem++ mpi version (3.13-2) on your Mac 10.6 (Snow leopard) <A HREF="http://www.ljll.math.upmc.fr/~hecht/ftp/FF-conf/InstallMac10.6.html" > See this page </A>.
<li>to install
my freefem++ mpi version (3.14) on your Mac 10.7 (Lion) <A HREF="http://www.ljll.math.upmc.fr/~hecht/ftp/FF-conf/InstallMac10.7.html" > See this page </A>.
</li>
<li>
A seminar at <A HREF="http://www-math.univ-paris13.fr/laga/"> laga </A>
at Villetaneuse, france , jan, 2010 <A HREF="http://www.ljll.math.upmc.fr/~hecht/ftp/FF-conf/ff++-laga-2010.pdf">FreeFem++, a tool to solve PDE’s numerically. </A>
</li>
<li>
A presentation at <A HREF="http://lma.univ-pau.fr/meet/mamern09/"> MAMERN 09 .</A>
at Pau, france , june 11th, 2009, <A HREF="http://www.ljll.math.upmc.fr/~hecht/ftp/FH-Mamerm09.pdf">the slide Error indicator and mesh
adaption, in FreeFem++ </A>.
</li>
<li>
A presentation and all the data files at <A HREF="http://math.tkk.fi/numericsyear/fefair/"> Finite element fair .</A>
Helsinki University of Technology
Institute of Mathematics, june 5-6Th 2009 , the zip file :<A HREF="http://www.ljll.math.upmc.fr/~hecht/ftp/HECHT-FEFE09-dir.zip "> FreeFem++, 3d tools for
PDE simulation </A>.</li>
</li>
<li>
<A HREF="http://www.cimpa-icpam.org/index.php"> CIMPA</A>-UNESCO-
<A HREF="http://www.univ-ag.fr/aoc/?guadeloupe09">GUADELOUPE School </A>
January, 03-18, 2009, Pointe-à-Pitre, the <A HREF="ftp/CIMPA/CIMPA-Guadeloupe-FF.pdf"> pdf of my lecture (742Ko)</A> on freefem++ and the <A HREF="ftp/CIMPA/FF-CIMPA.zip"> archive (.zip) of all the examples (6.2Mo) </A>
</li>
</ul>
</p>
<!-- ---------------------------------------------------------------------- -->
<table WIDTH="500" BACKGROUND="@[email protected]" ><tr>
<td><font color="#0000FF"><font size=+1>Examples in 2d and 3d.</font></td>
</tr></table>
<ul>
<li><a href="http:@[email protected]">A small movie (340Kb)</a> :
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.
</ul>
<ul>
<li>A very small example 2d of how to solve the Poisson equation on a L
shape :
<table><tr>
<td>
<blockquote><TT><font size=-1><PRE>
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); <font color=red> // to change P1 in P2 to make P2 finite element.</font>
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; <font color=red>// solve the problem </font>
plot(u,Th,wait=1);
Th=adaptmesh(Th,u,inquire=1,err=error);
error = error * coef;
} ;
</PRE></TT></blockquote>
</td>
<td>
<img SRC="@[email protected]" BORDER=0 height=250 width=250><img
SRC="@[email protected]" BORDER=0 height=250 width=250> </p>
<p align=CENTER> Solution on adapted mesh and associated mesh. </p>
</td>
</tr>
</table>
</ul>
A 3d example
<ul>
<li>A very small example of how to solve the Stokes equation 3d on cube
shape :
<table><tr>
<td>
<blockquote><TT><font size=-1><PRE>
load "msh3" load "medit" <font color=red> // dynamics load tools for 3d.</font>
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); <font color=red> // see the 3d mesh with medit software</font>
Fe<ce VVh(Th,[P23d,P23d,P23d,P13d]);
<font color=blue> macro Grad(u) [dx(u),dy(u),dz(u)] // EOM</font>
<font color=blue> macro div(u1,u2,u3) (dx(u1)+dy(u2)+dz(u3)) //EOM</font>
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); <font color=red> // a 3d plot of iso pressure. in progress... march 2009</font>
<font color=red> // to see the 10 cut plan in 2d </font>
for(int i=1;i<10;i++)
{
real yy=i/10.; <font color=red>// compute yy.</font>
<font color=red> // do 3d -> 2d interpolation.</font>
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);
}
</PRE></TT></blockquote>
</td>
<td>
<img SRC="@[email protected]" BORDER=0 height=250 width=250><img
SRC="@[email protected]" BORDER=0 height=250 width=250> </p>
<p align=CENTER> Solution on cup plan y=0.5 and mesh 10x10x10 and associated mesh. </p>
</td>
</tr>
</table>
</ul>
<!-- ---------------------------------------------------------------------- -->
<table WIDTH="500" BACKGROUND="@[email protected]" ><tr>
<td><font color="#0000FF"><font size=+1>Ongoing Work</font></td>
</tr></table>
<ul>
<li>
<img src="@[email protected]">FreeVol: Finite Vol thecnics in freefem for hyperbolic PDEs </li>
<li>
3D implementation: new solver, new mesh tools, new kind of finite
element </li>
<li> Stabilize and test all // linear solver interface</li>
</ul>
<p>
<!-- ---------------------------------------------------------------------- -->
<table WIDTH="500" BACKGROUND="@[email protected]" ><tr>
<td><font color="#0000FF"><font size=+1><a name="download">Full List
of Downloads</a></font></td>
</tr></table>
<p><img src="freefem/new.gif"> The current version of <i>Freefem++</i> is <tt><font
color="#FF0000"> @ver@</tt></font>. You can get the latest source from
an anonymous <A href="http://mercurial.selenic.com/" > Mercurial SCM </A> copy with the following unix shell commands :
<PRE>
<tt>hg clone http://www.freefem.org/ff++/ff++
</tt></PRE>
<p><A NAME="macmpi"> <img src="@[email protected]">To install a precompile version of freefem++ with mpi interface freefem++ mpi on your Mac in under version 10.6 (Snow leopard) <A HREF="http://www.ljll.math.upmc.fr/~hecht/ftp/FF-conf/InstallMac10.6.html" > See this page </A>.<p>
<p><A NAME="macmpi10.7"> <img src="@[email protected]"><b><font color="#FF0000"> First the FreeFem++.app do not work under Lion (to old) </font></b> but the terminal command work, and to install a precompile version of freefem++ with mpi interface freefem++ mpi on your Mac in under version 10.7 (Lion) <A HREF="http://www.ljll.math.upmc.fr/~hecht/ftp/FF-conf/InstallMac10.7.html" > See this page </A>.<p>
<p><img src="@[email protected]">To recompile freefem++ with mpi interface freefem++ mpi under Windows <A HREF="http://www.ljll.math.upmc.fr/~hecht/ftp/FF-conf/InstallWin32.html" > See this page </A>.<p>
<!--
<p>To install and update FreeFem++ automatically on a Debian system,
insert one of the following lines in the file
<tt>/etc/apt/sources.list</tt> then run (as root) "<tt>apt-get
update</tt>" and "<tt>apt-get install freefem++-x11
freefem++-nw </tt>" :
<ul>
<li>for Debian "testing" : <tt>deb
http://www.freefem.org/ff++/debian testing ff++</tt>
<li>for Debian "unstable" : <tt>deb
http://www.freefem.org/ff++/debian unstable ff++</tt>
<li>for Debian "amd64" : <tt>deb
http://www.freefem.org/ff++/debian debian64 ff++</tt>
<li> for FreeBSD port you can see <a href="http://www.freshports.org/math/freefem++/"> http://www.freshports.org/math/freefem++/ </a> page
</ul>
-->
<p>Self-contained archives for all other systems :
<A NAME="mac10.6"> <menu>
@download@
</menu>
<p>This <a href="ftp"> directory</A> contains all the different
versions of <i>FreeFem</i>.</font>
<p>
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<table WIDTH="500" BACKGROUND="@[email protected]" ><tr>
<td><font color="#0000FF"><font size=+1>Page written by</font></td>
</tr></table>
<p>
<A HREF="mailto:[email protected]">Frédéric Hecht</A> et
<A HREF="http://www.ann.jussieu.fr/~lehyaric"> Antoine Le Hyaric</A>
<P>
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