/usr/share/doc/freefem3d/examples/temperature.ff is in freefem3d 1.0pre10-3.4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 | // -*- c++ -*-
// This file is part of ff3d - http://www.freefem.org/ff3d
// Copyright (C) 2003 Laboratoire J.-L. Lions UPMC Paris
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2, or (at your option)
// any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software Foundation,
// Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
// $Id: temperature.ff,v 1.3 2005/10/16 13:38:36 delpinux Exp $
vector n = (10,10,10);
vector a = (-5,-5,-5);
vector b = (5,5,5);
scene S = pov("temperature.pov");
mesh M = structured(n,a,b);
domain O = domain(S,outside(<1,0,0>) and outside(<0,1,0>));
solve(u) in O by M
memory(matrix=none),
method(type=penalty)
{
pde(u)
-div(grad(u)) = 0;
u = 10 on <1,0,0>;
u = 25 on <0,1,0>;
dnu(u) = 0 on M;
};
save(medit,"temperature",M);
save(medit,"temperature",u,M);
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