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annotate +sbp/+implementations/intOpMC_orders_2to2_ratio2to1.m @ 958:72cd29107a9a feature/poroelastic

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Temporary changes in multiblock.DiffOp. Change traction operators in Elastic2dvariable to be true boundary operators. But adjoint FD conv test fails for dirichlet BC so need to debug!
author Martin Almquist <malmquist@stanford.edu>
date Wed, 05 Dec 2018 18:58:10 -0800
parents c923fe6197ff
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1 function [IC2F,IF2C] = intOpMC_orders_2to2_ratio2to1(mc)
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3 mf = 2*(mc-1) + 1;
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5 stencil_F2C = [1.0./4.0,1.0./2.0,1.0./4.0];
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6 stencil_width = length(stencil_F2C);
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7 stencil_halfwidth = (stencil_width-1)/2;
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9 BC_F2C = [1.0./2.0,1.0./2.0];
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11 Hc = speye(mc,mc);
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12 Hc(1,1) = 1/2;
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13 Hc(end,end) = 1/2;
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15 Hf = 1/2*speye(mf,mf);
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16 Hf(1,1) = 1/4;
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17 Hf(end,end) = 1/4;
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19 IF2C = sparse(mc,mf);
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20 [BCrows, BCcols] = size(BC_F2C);
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21 IF2C(1:BCrows, 1:BCcols) = BC_F2C;
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22 IF2C(mc-BCrows+1:mc, mf-BCcols+1:mf) = rot90(BC_F2C,2);
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24 for i = BCrows+1 : mc-BCrows
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25 IF2C(i,(2*i-stencil_halfwidth-1) :(2*i+stencil_halfwidth-1))...
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26 = stencil_F2C;
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27 end
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29 IC2F = Hf\(IF2C'*Hc);
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