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annotate +sbp/+implementations/intOpMC_orders_6to6_ratio2to1.m @ 1031:2ef20d00b386 feature/advectionRV

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For easier comparison, return both the first order and residual viscosity when evaluating the residual. Add the first order and residual viscosity to the state of the RungekuttaRV time steppers
author Vidar Stiernström <vidar.stiernstrom@it.uu.se>
date Thu, 17 Jan 2019 10:25:06 +0100
parents c923fe6197ff
children
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1 % Marks New interpolation operators
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2 % 6th order accurate (diagonal norm)
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3 % M=19 is the minimum amount of points on the coarse mesh
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4
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5 function [IC2F,IF2C] = intOpMC_orders_6to6_ratio2to1(M_C)
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6
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7 M_F=M_C*2-1;
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8
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9 % Coarse to fine
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10 I1=zeros(M_F,M_C);
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12 t1= [6854313/6988288 , 401925/6988288 , -401925/6988288 ...
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53 -601/614400 , 601/245760 , -601/368640 , 0 , 0 , ...
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58 231/256 , 75/1024 , -15/512 , 5/1024 ] ;
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60 t2= [5/1024 , -15/512 , 75/1024, 231/256 , 75/1024 , -15/512 , 5/1024];
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64 I1(1:17,1:12)=t1;
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65 I1(M_F-16:M_F,M_C-11:M_C)=fliplr(flipud(t1));
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66 I1(18,7:12)=t3;
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67 for i=19:2:M_F-18
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68 j=(i-3)/2;
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69 I1(i,j-1:j+5)=t2;
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70 I1(i+1,j:j+5)=t3;
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71 end
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72
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73 % Fine to coarse
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74 I2=zeros(M_C,M_F);
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97 -3005/5552128];
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103 75/2048 , -25/512 , -15/1024 , 3/512 , 5/2048];
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105 I2(1:3,1:17)=t1;
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106
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107 I2(M_C-2:M_C,M_F-16:M_F)=fliplr(flipud(t1));
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109 for i=4:M_C-3
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110 j=2*(i-4)+1;
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111 I2(i,j:j+12)=t2;
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112 end
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113 IC2F = sparse(I1);
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114 IF2C = sparse(I2);
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115