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annotate inst/example/Evolution/Evolution.m @ 164:7190852cf57f

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Update the examples giving two input parameters to the BilinearForm.
author gedeone-octave <marcovass89@hotmail.it>
date Sat, 05 Oct 2013 10:40:06 +0100
parents d03d998e64af
children e85390ed620d
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08dc5547f4d6 Update the examples to the new naming conventions.
gedeone-octave <marcovass89@hotmail.it>
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1 pkg load fem-fenics msh
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3 problem = 'Evolution';
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4 import_ufl_Problem (problem);
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6 mesh = Mesh (msh2m_structured_mesh (0:0.05:1, 0:0.05:1, 1, 1:4));
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8 V = FunctionSpace(problem, mesh);
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10 bc = DirichletBC (V, @(x,y) 1, 1:4);
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12 t = 0;
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13 dt = 0.01;
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14 T = 0.3;
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16 k = Expression ('dt', @(x,y) dt);
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18 u0 = Expression ('u0', @(x,y) 10*exp(-((x - 0.5)^2 + (y - 0.5)^2) / 0.02));
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20 a = BilinearForm (problem, V, V, k);
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21 L = LinearForm (problem, V, k, u0);
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23 A = assemble (a, bc);
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25 # solve the problem for each time step
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26 # We need to update only the lhs
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27 while t < T
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28 t += dt;
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30 # we can pass u0 to the lhs indifferently as a fem_coeff or
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31 # as a fem_func
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32 L = LinearForm (problem, V, k, u0);
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33 b = assemble (L, bc);
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35 u = A \ b;
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37 u0 = Function ('u0', V, u);
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39 #press Q to make the plot continue
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40 plot (u0);
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41 end