[368] | 1 | #*------------------------------------------------------------------- |
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| 2 | * EMSO Model Library (EML) Copyright (C) 2004 - 2007 ALSOC. |
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| 3 | * |
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| 4 | * This LIBRARY is free software; you can distribute it and/or modify |
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| 5 | * it under the therms of the ALSOC FREE LICENSE as available at |
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| 6 | * http://www.enq.ufrgs.br/alsoc. |
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| 7 | * |
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| 8 | * EMSO Copyright (C) 2004 - 2007 ALSOC, original code |
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| 9 | * from http://www.rps.eng.br Copyright (C) 2002-2004. |
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| 10 | * All rights reserved. |
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| 11 | * |
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| 12 | * EMSO is distributed under the therms of the ALSOC LICENSE as |
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| 13 | * available at http://www.enq.ufrgs.br/alsoc. |
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| 14 | * |
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| 15 | *-------------------------------------------------------------------- |
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| 16 | * FlowSheet showing how to use the 'if' conditional. |
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| 17 | * Ref: K.M. Moudgalya & V. Ryali (2001). Chemical Engineering Science |
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| 18 | * v.56, n.11, pp.3595-3609 |
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| 19 | *-------------------------------------------------------------------- |
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| 20 | * Author: Arge |
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| 21 | * $Id: $ |
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| 22 | *--------------------------------------------------------------------*# |
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| 23 | |
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| 24 | using "types"; |
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| 25 | |
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| 26 | Model GasLiquid |
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| 27 | PARAMETERS |
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| 28 | kgx as positive (Unit = 'mol/atm/s'); |
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| 29 | klx as positive (Unit = 'mol/atm/s'); |
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| 30 | R as positive (Default = 0.082, Unit = 'atm * l / (mol * K)'); |
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| 31 | T as temperature; |
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| 32 | Po as pressure; |
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| 33 | Vd as volume (DisplayUnit = 'l'); |
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| 34 | V as volume (DisplayUnit = 'l'); |
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| 35 | roL as dens_mol (DisplayUnit = 'mol/l'); |
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| 36 | |
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| 37 | VARIABLES |
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| 38 | Mg as mol (DisplayUnit = 'mol'); |
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| 39 | Ml as mol (DisplayUnit = 'mol'); |
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| 40 | Fg as flow_mol (DisplayUnit = 'mol/s'); |
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| 41 | Fl as flow_mol (DisplayUnit = 'mol/s'); |
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| 42 | P as pressure; |
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| 43 | |
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| 44 | EQUATIONS |
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| 45 | P = Mg * R * T / (V - Ml/roL); |
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| 46 | |
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| 47 | if Ml > Vd * roL then |
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| 48 | diff(Mg) = Fg; |
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| 49 | diff(Ml) = Fl - klx * (P - Po); |
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| 50 | else |
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| 51 | diff(Mg) = Fg - kgx * (P - Po); |
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| 52 | diff(Ml) = Fl; |
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| 53 | end |
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| 54 | |
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| 55 | SET |
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| 56 | roL = 50 * 'mol/l'; |
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| 57 | V = 10 * 'l'; |
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| 58 | Vd = 5 * 'l'; |
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| 59 | T = 300 * 'K'; |
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| 60 | Po = 1 * 'atm'; |
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| 61 | kgx = 0.1 * 'mol/atm/s'; |
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| 62 | klx = 0.1 * 'mol/atm/s'; |
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| 63 | end |
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| 64 | |
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| 65 | |
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| 66 | FlowSheet GasLiq1 as GasLiquid |
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| 67 | |
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| 68 | SPECIFY |
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| 69 | Fg = 0.1 * 'mol/s'; |
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| 70 | Fl = 2.5 * 'mol/s'; |
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| 71 | |
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| 72 | INITIAL |
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| 73 | P = 3.5 * 'atm'; |
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| 74 | Ml = 245 * 'mol'; |
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| 75 | |
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| 76 | OPTIONS |
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| 77 | # TimeStep = 100; # for statistical purpose (Detailed Output) |
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| 78 | TimeStep = 1; # for graphical purpose |
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| 79 | TimeEnd = 100; |
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| 80 | TimeUnit = 's'; |
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| 81 | DAESolver (File = "dasslc", |
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| 82 | RelativeAccuracy = 1e-4, |
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| 83 | AbsoluteAccuracy = 1e-6); |
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| 84 | end |
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| 85 | |
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| 86 | |
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| 87 | FlowSheet GasLiq2 as GasLiquid |
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| 88 | |
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| 89 | SPECIFY |
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| 90 | Fg = 2.0 * 'mol/s'; |
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| 91 | Fl = 1.0 * 'mol/s'; |
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| 92 | |
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| 93 | INITIAL |
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| 94 | P = 1.0 * 'atm'; |
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| 95 | Ml = 249 * 'mol'; |
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| 96 | |
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| 97 | OPTIONS |
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| 98 | # TimeStep = 10; # for statistical purpose (Detailed Output) |
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| 99 | TimeStep = 0.1; # for graphical purpose |
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| 100 | TimeEnd = 10; |
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| 101 | TimeUnit = 's'; |
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| 102 | DAESolver (File = "dasslc", |
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| 103 | RelativeAccuracy = 1e-4, |
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| 104 | AbsoluteAccuracy = 1e-6); |
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| 105 | end |
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| 106 | |
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| 107 | |
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| 108 | Model GasLiquid_reg |
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| 109 | PARAMETERS |
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| 110 | kgx as positive (Unit = 'mol/atm/s'); |
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| 111 | klx as positive (Unit = 'mol/atm/s'); |
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| 112 | R as positive (Default = 0.082, Unit = 'atm * l / (mol * K)'); |
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| 113 | T as temperature; |
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| 114 | Po as pressure; |
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| 115 | Vd as volume (DisplayUnit = 'l'); |
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| 116 | V as volume (DisplayUnit = 'l'); |
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| 117 | roL as dens_mol (DisplayUnit = 'mol/l'); |
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| 118 | eps as Real (Default=1e-5); |
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| 119 | |
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| 120 | VARIABLES |
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| 121 | Mg as mol (DisplayUnit = 'mol'); |
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| 122 | Ml as mol (DisplayUnit = 'mol'); |
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| 123 | Fg as flow_mol (DisplayUnit = 'mol/s'); |
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| 124 | Fl as flow_mol (DisplayUnit = 'mol/s'); |
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| 125 | P as pressure; |
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| 126 | n as Real; |
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| 127 | |
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| 128 | EQUATIONS |
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| 129 | P = Mg * R * T / (V - Ml/roL); |
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| 130 | |
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| 131 | n = 0.5 * (1 + tanh((Ml/(Vd * roL)-1)/eps)); # regularization function |
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| 132 | # n = 0.5 * (1+((Ml/(Vd * roL)-1)/eps)/(sqrt(1+((Ml/(Vd * roL)-1)/eps)^2))); # regularization function |
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| 133 | |
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| 134 | diff(Mg) = Fg - kgx * (P - Po)*(1-n); |
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| 135 | diff(Ml) = Fl - klx * (P - Po)*n; |
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| 136 | |
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| 137 | SET |
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| 138 | roL = 50 * 'mol/l'; |
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| 139 | V = 10 * 'l'; |
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| 140 | Vd = 5 * 'l'; |
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| 141 | T = 300 * 'K'; |
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| 142 | Po = 1 * 'atm'; |
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| 143 | kgx = 0.1 * 'mol/atm/s'; |
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| 144 | klx = 0.1 * 'mol/atm/s'; |
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| 145 | end |
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| 146 | |
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| 147 | FlowSheet GasLiq1_reg as GasLiquid_reg |
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| 148 | |
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| 149 | SPECIFY |
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| 150 | Fg = 0.1 * 'mol/s'; |
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| 151 | Fl = 2.5 * 'mol/s'; |
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| 152 | |
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| 153 | INITIAL |
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| 154 | P = 3.5 * 'atm'; |
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| 155 | Ml = 245 * 'mol'; |
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| 156 | |
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| 157 | OPTIONS |
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| 158 | # TimeStep = 100; # for statistical purpose (Detailed Output) |
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| 159 | TimeStep = 1; # for graphical purpose |
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| 160 | TimeEnd = 100; |
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| 161 | TimeUnit = 's'; |
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| 162 | DAESolver (File = "dasslc", |
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| 163 | RelativeAccuracy = 1e-4, |
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| 164 | AbsoluteAccuracy = 1e-6); |
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| 165 | end |
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| 166 | |
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| 167 | |
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| 168 | FlowSheet GasLiq2_reg as GasLiquid_reg |
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| 169 | |
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| 170 | SPECIFY |
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| 171 | Fg = 2.0 * 'mol/s'; |
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| 172 | Fl = 1.0 * 'mol/s'; |
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| 173 | |
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| 174 | INITIAL |
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| 175 | P = 1.0 * 'atm'; |
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| 176 | Ml = 249 * 'mol'; |
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| 177 | |
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| 178 | OPTIONS |
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| 179 | # TimeStep = 10; # for statistical purpose (Detailed Output) |
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| 180 | TimeStep = 0.1; # for graphical purpose |
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| 181 | TimeEnd = 10; |
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| 182 | TimeUnit = 's'; |
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| 183 | DAESolver (File = "dasslc", |
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| 184 | RelativeAccuracy = 1e-4, |
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| 185 | AbsoluteAccuracy = 1e-6); |
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| 186 | end |
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