FreeFOAM The Cross-Platform CFD Toolkit
Gulders.C
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25 
26 #include "Gulders.H"
28 
29 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
30 
31 namespace Foam
32 {
33 namespace laminarFlameSpeedModels
34 {
35  defineTypeNameAndDebug(Gulders, 0);
36 
38  (
39  laminarFlameSpeed,
40  Gulders,
41  dictionary
42  );
43 }
44 }
45 
46 
47 // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
48 
49 Foam::laminarFlameSpeedModels::Gulders::Gulders
50 (
51  const dictionary& dict,
52  const hhuCombustionThermo& ct
53 )
54 :
55  laminarFlameSpeed(dict, ct),
56 
57  coeffsDict_(dict.subDict(typeName + "Coeffs").subDict(fuel_)),
58  W_(readScalar(coeffsDict_.lookup("W"))),
59  eta_(readScalar(coeffsDict_.lookup("eta"))),
60  xi_(readScalar(coeffsDict_.lookup("xi"))),
61  f_(readScalar(coeffsDict_.lookup("f"))),
62  alpha_(readScalar(coeffsDict_.lookup("alpha"))),
63  beta_(readScalar(coeffsDict_.lookup("beta")))
64 {}
65 
66 
67 // * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
68 
70 {}
71 
72 
73 // * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * * //
74 
75 inline Foam::scalar Foam::laminarFlameSpeedModels::Gulders::SuRef
76 (
77  scalar phi
78 ) const
79 {
80  if (phi > SMALL)
81  {
82  return W_*pow(phi, eta_)*exp(-xi_*sqr(phi - 1.075));
83  }
84  else
85  {
86  return 0.0;
87  }
88 }
89 
90 
91 inline Foam::scalar Foam::laminarFlameSpeedModels::Gulders::Su0pTphi
92 (
93  scalar p,
94  scalar Tu,
95  scalar phi,
96  scalar Yres
97 ) const
98 {
99  static const scalar Tref = 300.0;
100  static const scalar pRef = 1.013e5;
101 
102  return SuRef(phi)*pow((Tu/Tref), alpha_)*pow((p/pRef), beta_)*(1 - f_*Yres);
103 }
104 
105 
106 Foam::tmp<Foam::volScalarField> Foam::laminarFlameSpeedModels::Gulders::Su0pTphi
107 (
108  const volScalarField& p,
109  const volScalarField& Tu,
110  scalar phi
111 ) const
112 {
113  tmp<volScalarField> tSu0
114  (
115  new volScalarField
116  (
117  IOobject
118  (
119  "Su0",
120  p.time().timeName(),
121  p.db(),
124  ),
125  p.mesh(),
126  dimensionedScalar("Su0", dimVelocity, 0.0)
127  )
128  );
129 
130  volScalarField& Su0 = tSu0();
131 
132  forAll(Su0, celli)
133  {
134  Su0[celli] = Su0pTphi(p[celli], Tu[celli], phi, 0.0);
135  }
136 
137  forAll(Su0.boundaryField(), patchi)
138  {
139  forAll(Su0.boundaryField()[patchi], facei)
140  {
141  Su0.boundaryField()[patchi][facei] =
142  Su0pTphi
143  (
144  p.boundaryField()[patchi][facei],
145  Tu.boundaryField()[patchi][facei],
146  phi,
147  0.0
148  );
149  }
150  }
151 
152  return tSu0;
153 }
154 
155 
156 Foam::tmp<Foam::volScalarField> Foam::laminarFlameSpeedModels::Gulders::Su0pTphi
157 (
158  const volScalarField& p,
159  const volScalarField& Tu,
160  const volScalarField& phi
161 ) const
162 {
163  tmp<volScalarField> tSu0
164  (
165  new volScalarField
166  (
167  IOobject
168  (
169  "Su0",
170  p.time().timeName(),
171  p.db(),
174  ),
175  p.mesh(),
176  dimensionedScalar("Su0", dimVelocity, 0.0)
177  )
178  );
179 
180  volScalarField& Su0 = tSu0();
181 
182  forAll(Su0, celli)
183  {
184  Su0[celli] = Su0pTphi(p[celli], Tu[celli], phi[celli], 0.0);
185  }
186 
187  forAll(Su0.boundaryField(), patchi)
188  {
189  forAll(Su0.boundaryField()[patchi], facei)
190  {
191  Su0.boundaryField()[patchi][facei] =
192  Su0pTphi
193  (
194  p.boundaryField()[patchi][facei],
195  Tu.boundaryField()[patchi][facei],
196  phi.boundaryField()[patchi][facei],
197  0.0
198  );
199  }
200  }
201 
202  return tSu0;
203 }
204 
205 
208 {
209  if (hhuCombustionThermo_.composition().contains("ft"))
210  {
211  const volScalarField& ft = hhuCombustionThermo_.composition().Y("ft");
212 
213  return Su0pTphi
214  (
215  hhuCombustionThermo_.p(),
216  hhuCombustionThermo_.Tu(),
218  (
219  hhuCombustionThermo_.lookup("stoichiometricAirFuelMassRatio")
220  )*ft/((1 + SMALL) - ft)
221  );
222  }
223  else
224  {
225  return Su0pTphi
226  (
227  hhuCombustionThermo_.p(),
228  hhuCombustionThermo_.Tu(),
229  equivalenceRatio_
230  );
231  }
232 }
233 
234 
235 // ************************ vim: set sw=4 sts=4 et: ************************ //