Mercurial > repos > public > sbplib
annotate +scheme/Utux2d.m @ 1303:49e3870335ef feature/poroelastic
Make the hollow scheme generation more efficient by introducing the D2VariableHollow opSet
author | Martin Almquist <malmquist@stanford.edu> |
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date | Sat, 11 Jul 2020 06:54:15 -0700 |
parents | cab047de7f5d |
children | 78db023a7fe3 f029b97dbc72 c12b84fe9b00 |
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1 classdef Utux2d < scheme.Scheme |
591 | 2 properties |
3 m % Number of points in each direction, possibly a vector | |
4 h % Grid spacing | |
5 grid % Grid | |
6 order % Order accuracy for the approximation | |
7 v0 % Initial data | |
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8 |
591 | 9 a % Wave speed a = [a1, a2]; |
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10 % Can either be a constant vector or a cell array of function handles. |
591 | 11 |
12 H % Discrete norm | |
595 | 13 H_x, H_y % Norms in the x and y directions |
14 Hi, Hx, Hy, Hxi, Hyi % Kroneckered norms | |
591 | 15 |
16 % Derivatives | |
17 Dx, Dy | |
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18 |
591 | 19 % Boundary operators |
20 e_w, e_e, e_s, e_n | |
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21 |
591 | 22 D % Total discrete operator |
23 end | |
24 | |
25 | |
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26 methods |
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27 function obj = Utux2d(g ,order, opSet, a) |
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28 |
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29 default_arg('a',1/sqrt(2)*[1, 1]); |
591 | 30 default_arg('opSet',@sbp.D2Standard); |
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31 |
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32 assertType(g, 'grid.Cartesian'); |
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33 if iscell(a) |
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34 a1 = grid.evalOn(g, a{1}); |
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35 a2 = grid.evalOn(g, a{2}); |
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36 a = {spdiag(a1), spdiag(a2)}; |
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37 else |
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38 a = {a(1), a(2)}; |
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39 end |
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40 |
591 | 41 m = g.size(); |
42 m_x = m(1); | |
43 m_y = m(2); | |
44 m_tot = g.N(); | |
45 | |
595 | 46 xlim = {g.x{1}(1), g.x{1}(end)}; |
47 ylim = {g.x{2}(1), g.x{2}(end)}; | |
591 | 48 obj.grid = g; |
49 | |
50 % Operator sets | |
51 ops_x = opSet(m_x, xlim, order); | |
52 ops_y = opSet(m_y, ylim, order); | |
53 Ix = speye(m_x); | |
54 Iy = speye(m_y); | |
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55 |
591 | 56 % Norms |
57 Hx = ops_x.H; | |
58 Hy = ops_y.H; | |
59 Hxi = ops_x.HI; | |
60 Hyi = ops_y.HI; | |
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61 |
595 | 62 obj.H_x = Hx; |
63 obj.H_y = Hy; | |
591 | 64 obj.H = kron(Hx,Hy); |
65 obj.Hi = kron(Hxi,Hyi); | |
66 obj.Hx = kron(Hx,Iy); | |
67 obj.Hy = kron(Ix,Hy); | |
68 obj.Hxi = kron(Hxi,Iy); | |
69 obj.Hyi = kron(Ix,Hyi); | |
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70 |
591 | 71 % Derivatives |
72 Dx = ops_x.D1; | |
73 Dy = ops_y.D1; | |
74 obj.Dx = kron(Dx,Iy); | |
75 obj.Dy = kron(Ix,Dy); | |
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76 |
591 | 77 % Boundary operators |
78 obj.e_w = kr(ops_x.e_l, Iy); | |
79 obj.e_e = kr(ops_x.e_r, Iy); | |
80 obj.e_s = kr(Ix, ops_y.e_l); | |
81 obj.e_n = kr(Ix, ops_y.e_r); | |
82 | |
83 obj.m = m; | |
84 obj.h = [ops_x.h ops_y.h]; | |
85 obj.order = order; | |
595 | 86 obj.a = a; |
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87 obj.D = -(a{1}*obj.Dx + a{2}*obj.Dy); |
591 | 88 |
89 end | |
90 % Closure functions return the opertors applied to the own domain to close the boundary | |
91 % Penalty functions return the opertors to force the solution. In the case of an interface it returns the operator applied to the other doamin. | |
92 % boundary is a string specifying the boundary e.g. 'l','r' or 'e','w','n','s'. | |
93 % type is a string specifying the type of boundary condition if there are several. | |
94 % data is a function returning the data that should be applied at the boundary. | |
95 % neighbour_scheme is an instance of Scheme that should be interfaced to. | |
96 % neighbour_boundary is a string specifying which boundary to interface to. | |
97 function [closure, penalty] = boundary_condition(obj,boundary,type) | |
98 default_arg('type','dirichlet'); | |
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99 |
591 | 100 sigma = -1; % Scalar penalty parameter |
101 switch boundary | |
102 case {'w','W','west','West'} | |
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103 tau = sigma*obj.a{1}*obj.e_w*obj.H_y; |
591 | 104 closure = obj.Hi*tau*obj.e_w'; |
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105 |
591 | 106 case {'s','S','south','South'} |
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107 tau = sigma*obj.a{2}*obj.e_s*obj.H_x; |
591 | 108 closure = obj.Hi*tau*obj.e_s'; |
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109 end |
591 | 110 penalty = -obj.Hi*tau; |
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111 |
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112 end |
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113 |
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114 % type Struct that specifies the interface coupling. |
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115 % Fields: |
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116 % -- couplingType String, type of interface coupling |
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117 % % Default: 'upwind'. Other: 'centered' |
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118 % -- interpolation: type of interpolation, default 'none' |
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119 % -- interpolationDamping: damping on upstream and downstream sides, when using interpolation. |
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120 % Default {0,0} gives zero damping. |
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121 function [closure, penalty] = interface(obj,boundary,neighbour_scheme,neighbour_boundary,type) |
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122 |
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123 defaultType.couplingType = 'upwind'; |
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124 defaultType.interpolation = 'none'; |
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125 defaultType.interpolationDamping = {0,0}; |
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126 default_struct('type', defaultType); |
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127 |
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128 switch type.interpolation |
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129 case {'none', ''} |
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130 [closure, penalty] = interfaceStandard(obj,boundary,neighbour_scheme,neighbour_boundary,type); |
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131 case {'op','OP'} |
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132 [closure, penalty] = interfaceNonConforming(obj,boundary,neighbour_scheme,neighbour_boundary,type); |
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133 otherwise |
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134 error('Unknown type of interpolation: %s ', type.interpolation); |
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135 end |
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136 end |
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137 |
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138 function [closure, penalty] = interfaceStandard(obj,boundary,neighbour_scheme,neighbour_boundary,type) |
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139 couplingType = type.couplingType; |
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140 |
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141 % Get neighbour boundary operator |
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142 switch neighbour_boundary |
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143 case {'e','E','east','East'} |
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144 e_neighbour = neighbour_scheme.e_e; |
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145 case {'w','W','west','West'} |
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146 e_neighbour = neighbour_scheme.e_w; |
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147 case {'n','N','north','North'} |
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148 e_neighbour = neighbour_scheme.e_n; |
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149 case {'s','S','south','South'} |
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150 e_neighbour = neighbour_scheme.e_s; |
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151 end |
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152 |
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153 switch couplingType |
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154 |
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155 % Upwind coupling (energy dissipation) |
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156 case 'upwind' |
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157 sigma_ds = -1; %"Downstream" penalty |
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158 sigma_us = 0; %"Upstream" penalty |
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159 |
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160 % Energy-preserving coupling (no energy dissipation) |
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161 case 'centered' |
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162 sigma_ds = -1/2; %"Downstream" penalty |
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163 sigma_us = 1/2; %"Upstream" penalty |
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164 |
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165 otherwise |
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166 error(['Interface coupling type ' couplingType ' is not available.']) |
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167 end |
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168 |
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169 switch boundary |
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170 case {'w','W','west','West'} |
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171 tau = sigma_ds*obj.a{1}*obj.e_w*obj.H_y; |
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172 closure = obj.Hi*tau*obj.e_w'; |
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173 penalty = -obj.Hi*tau*e_neighbour'; |
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|
174 case {'e','E','east','East'} |
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|
175 tau = sigma_us*obj.a{1}*obj.e_e*obj.H_y; |
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|
176 closure = obj.Hi*tau*obj.e_e'; |
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177 penalty = -obj.Hi*tau*e_neighbour'; |
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178 case {'s','S','south','South'} |
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179 tau = sigma_ds*obj.a{2}*obj.e_s*obj.H_x; |
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|
180 closure = obj.Hi*tau*obj.e_s'; |
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|
181 penalty = -obj.Hi*tau*e_neighbour'; |
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|
182 case {'n','N','north','North'} |
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|
183 tau = sigma_us*obj.a{2}*obj.e_n*obj.H_x; |
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|
184 closure = obj.Hi*tau*obj.e_n'; |
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185 penalty = -obj.Hi*tau*e_neighbour'; |
605
0f9d20dbb7ce
Add centered interface coupling in addition to upwind
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595
diff
changeset
|
186 end |
610
b7b3c11fab4d
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605
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|
187 |
914
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|
188 end |
610
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Martin Almquist <malmquist@stanford.edu>
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|
189 |
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190 function [closure, penalty] = interfaceNonConforming(obj,boundary,neighbour_scheme,neighbour_boundary,type) |
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191 |
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192 % User can request special interpolation operators by specifying type.interpOpSet |
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193 default_field(type, 'interpOpSet', @sbp.InterpOpsOP); |
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194 |
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195 interpOpSet = type.interpOpSet; |
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196 couplingType = type.couplingType; |
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197 interpolationDamping = type.interpolationDamping; |
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198 |
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199 % Get neighbour boundary operator |
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200 switch neighbour_boundary |
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201 case {'e','E','east','East'} |
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202 e_neighbour = neighbour_scheme.e_e; |
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203 case {'w','W','west','West'} |
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204 e_neighbour = neighbour_scheme.e_w; |
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205 case {'n','N','north','North'} |
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206 e_neighbour = neighbour_scheme.e_n; |
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207 case {'s','S','south','South'} |
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|
208 e_neighbour = neighbour_scheme.e_s; |
905
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Include type as (optional) input parameter in the interface method of all schemes.
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743
diff
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|
209 end |
459eeb99130f
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210 |
914
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211 switch couplingType |
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212 |
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213 % Upwind coupling (energy dissipation) |
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214 case 'upwind' |
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215 sigma_ds = -1; %"Downstream" penalty |
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216 sigma_us = 0; %"Upstream" penalty |
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217 |
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218 % Energy-preserving coupling (no energy dissipation) |
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219 case 'centered' |
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220 sigma_ds = -1/2; %"Downstream" penalty |
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|
221 sigma_us = 1/2; %"Upstream" penalty |
666
2d85f17a8aec
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|
222 |
914
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223 otherwise |
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|
224 error(['Interface coupling type ' couplingType ' is not available.']) |
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225 end |
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226 |
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|
227 int_damp_us = interpolationDamping{1}; |
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228 int_damp_ds = interpolationDamping{2}; |
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229 |
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|
230 % u denotes the solution in the own domain |
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|
231 % v denotes the solution in the neighbour domain |
942
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232 % Find the number of grid points along the interface |
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233 switch boundary |
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|
234 case {'w','e'} |
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235 m_u = obj.m(2); |
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236 case {'s','n'} |
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|
237 m_u = obj.m(1); |
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|
238 end |
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|
239 m_v = size(e_neighbour, 2); |
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|
240 |
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|
241 % Build interpolation operators |
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|
242 intOps = interpOpSet(m_u, m_v, obj.order, neighbour_scheme.order); |
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|
243 Iu2v = intOps.Iu2v; |
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244 Iv2u = intOps.Iv2u; |
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|
245 |
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|
246 I_local2neighbour_ds = intOps.Iu2v.bad; |
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247 I_local2neighbour_us = intOps.Iu2v.good; |
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248 I_neighbour2local_ds = intOps.Iv2u.good; |
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249 I_neighbour2local_us = intOps.Iv2u.bad; |
914
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|
250 |
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diff
changeset
|
251 I_back_forth_us = I_neighbour2local_us*I_local2neighbour_us; |
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diff
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|
252 I_back_forth_ds = I_neighbour2local_ds*I_local2neighbour_ds; |
666
2d85f17a8aec
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610
diff
changeset
|
253 |
2d85f17a8aec
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diff
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|
254 |
942
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changeset
|
255 switch boundary |
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|
256 case {'w','W','west','West'} |
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257 tau = sigma_ds*obj.a{1}*obj.e_w*obj.H_y; |
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|
258 closure = obj.Hi*tau*obj.e_w'; |
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|
259 penalty = -obj.Hi*tau*I_neighbour2local_ds*e_neighbour'; |
666
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Add possibility for damping terms at interpolation interface.
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610
diff
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|
260 |
942
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|
261 beta = int_damp_ds*obj.a{1}... |
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262 *obj.e_w*obj.H_y; |
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|
263 closure = closure + obj.Hi*beta*I_back_forth_ds*obj.e_w' - obj.Hi*beta*obj.e_w'; |
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264 case {'e','E','east','East'} |
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265 tau = sigma_us*obj.a{1}*obj.e_e*obj.H_y; |
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266 closure = obj.Hi*tau*obj.e_e'; |
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267 penalty = -obj.Hi*tau*I_neighbour2local_us*e_neighbour'; |
666
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610
diff
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|
268 |
942
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|
269 beta = int_damp_us*obj.a{1}... |
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270 *obj.e_e*obj.H_y; |
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271 closure = closure + obj.Hi*beta*I_back_forth_us*obj.e_e' - obj.Hi*beta*obj.e_e'; |
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272 case {'s','S','south','South'} |
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273 tau = sigma_ds*obj.a{2}*obj.e_s*obj.H_x; |
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274 closure = obj.Hi*tau*obj.e_s'; |
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275 penalty = -obj.Hi*tau*I_neighbour2local_ds*e_neighbour'; |
666
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610
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|
276 |
942
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|
277 beta = int_damp_ds*obj.a{2}... |
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278 *obj.e_s*obj.H_x; |
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279 closure = closure + obj.Hi*beta*I_back_forth_ds*obj.e_s' - obj.Hi*beta*obj.e_s'; |
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280 case {'n','N','north','North'} |
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281 tau = sigma_us*obj.a{2}*obj.e_n*obj.H_x; |
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282 closure = obj.Hi*tau*obj.e_n'; |
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283 penalty = -obj.Hi*tau*I_neighbour2local_us*e_neighbour'; |
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284 |
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285 beta = int_damp_us*obj.a{2}... |
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286 *obj.e_n*obj.H_x; |
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287 closure = closure + obj.Hi*beta*I_back_forth_us*obj.e_n' - obj.Hi*beta*obj.e_n'; |
591 | 288 end |
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289 |
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290 |
591 | 291 end |
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292 |
591 | 293 function N = size(obj) |
294 N = obj.m; | |
295 end | |
296 | |
297 end | |
298 | |
299 methods(Static) | |
300 % Calculates the matrices needed for the inteface coupling between boundary bound_u of scheme schm_u | |
301 % and bound_v of scheme schm_v. | |
302 % [uu, uv, vv, vu] = inteface_coupling(A,'r',B,'l') | |
303 function [uu, uv, vv, vu] = interface_coupling(schm_u,bound_u,schm_v,bound_v) | |
304 [uu,uv] = schm_u.interface(bound_u,schm_v,bound_v); | |
305 [vv,vu] = schm_v.interface(bound_v,schm_u,bound_u); | |
306 end | |
307 end | |
308 end |