InterfaceCompositionModels.C
Go to the documentation of this file.
1/*---------------------------------------------------------------------------*\
2 ========= |
3 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
4 \\ / O peration |
5 \\ / A nd | www.openfoam.com
6 \\/ M anipulation |
7-------------------------------------------------------------------------------
8 Copyright (C) 2017-2022 OpenCFD Ltd.
9-------------------------------------------------------------------------------
10License
11 This file is part of OpenFOAM.
12
13 OpenFOAM is free software: you can redistribute it and/or modify it
14 under the terms of the GNU General Public License as published by
15 the Free Software Foundation, either version 3 of the License, or
16 (at your option) any later version.
17
18 OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
19 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
20 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
21 for more details.
22
23 You should have received a copy of the GNU General Public License
24 along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
25
26\*---------------------------------------------------------------------------*/
27
28#include "addToRunTimeSelectionTable.H"
29
30// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
31
32#include "thermoPhysicsTypes.H"
33
34#include "rhoConst.H"
35#include "perfectFluid.H"
36#include "Boussinesq.H"
37
38#include "pureMixture.H"
39#include "multiComponentMixture.H"
40#include "reactingMixture.H"
41#include "SpecieMixture.H"
42
43#include "rhoThermo.H"
44#include "rhoReactionThermo.H"
45#include "heRhoThermo.H"
46
47#include "solidThermo.H"
48#include "heSolidThermo.H"
49#include "solidThermoPhysicsTypes.H"
50
51#include "kineticGasEvaporation.H"
52#include "Lee.H"
53#include "interfaceHeatResistance.H"
54#include "interfaceOxideRate.H"
55#include "diffusionGasEvaporation.H"
56
57// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
58
59namespace Foam
60{
61 typedef
62 constTransport
63 <
64 species::thermo
65 <
66 hConstThermo
67 <
68 rhoConst<specie>
69 >,
70 sensibleEnthalpy
71 >
72 > constRhoHThermoPhysics;
73
74
75 typedef
76 constTransport
77 <
78 species::thermo
79 <
80 hConstThermo
81 <
82 Boussinesq<specie>
83 >,
84 sensibleEnthalpy
85 >
86 > BoussinesqFluidEThermoPhysics;
87};
88
89
90// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
91
92namespace Foam
93{
94 using namespace meltingEvaporationModels;
95
96 //NOTE: First thermo (from) and second otherThermo (to)
97
98 // kineticGasEvaporation model definitions
99
100 // From pure liquid (rhoConst) to a multi-component gas incomp phase
101 makeInterfaceContSpecieMixtureType
102 (
103 kineticGasEvaporation,
104 heRhoThermo,
105 rhoThermo,
106 pureMixture,
107 constRhoHThermoPhysics,
108 heRhoThermo,
109 rhoReactionThermo,
110 multiComponentMixture,
111 constIncompressibleGasHThermoPhysics
112 );
113
114 // From pure liquid (BoussinesqFluid) to a multi-component gas incomp
115 // phase
116 makeInterfaceContSpecieMixtureType
117 (
118 kineticGasEvaporation,
119 heRhoThermo,
120 rhoThermo,
121 pureMixture,
122 BoussinesqFluidEThermoPhysics,
123 heRhoThermo,
124 rhoReactionThermo,
125 multiComponentMixture,
126 constIncompressibleGasHThermoPhysics
127 );
128
129
130 // From pure liquid (rhoConst) to pure gas (incompressible ideal gas)
131 makeInterfacePureType
132 (
133 kineticGasEvaporation,
134 heRhoThermo,
135 rhoThermo,
136 pureMixture,
137 constRhoHThermoPhysics,
138 heRhoThermo,
139 rhoThermo,
140 pureMixture,
141 constIncompressibleGasHThermoPhysics
142 );
143
144 // From pure liquid (const rho) to pure gas (rhoConst) gas
145 makeInterfacePureType
146 (
147 kineticGasEvaporation,
148 heRhoThermo,
149 rhoThermo,
150 pureMixture,
151 constRhoHThermoPhysics,
152 heRhoThermo,
153 rhoThermo,
154 pureMixture,
155 constRhoHThermoPhysics
156 );
157
158
159 // From pure liquid (Boussinesq) to pure gas (incompressible ideal gas)
160 makeInterfacePureType
161 (
162 kineticGasEvaporation,
163 heRhoThermo,
164 rhoThermo,
165 pureMixture,
166 BoussinesqFluidEThermoPhysics,
167 heRhoThermo,
168 rhoThermo,
169 pureMixture,
170 constIncompressibleGasHThermoPhysics
171 );
172
173 // From pure liquid (Boussinesq) to pure gas (rho const)
174 makeInterfacePureType
175 (
176 kineticGasEvaporation,
177 heRhoThermo,
178 rhoThermo,
179 pureMixture,
180 BoussinesqFluidEThermoPhysics,
181 heRhoThermo,
182 rhoThermo,
183 pureMixture,
184 constRhoHThermoPhysics
185 );
186
187
188 // Lee model definitions
189
190 // From pure phase (rho const) to phase (rho const)
191 makeInterfacePureType
192 (
193 Lee,
194 heRhoThermo,
195 rhoThermo,
196 pureMixture,
197 constRhoHThermoPhysics,
198 heRhoThermo,
199 rhoThermo,
200 pureMixture,
201 constRhoHThermoPhysics
202 );
203
204 // From pure phase (rho const) to phase (Boussinesq)
205 makeInterfacePureType
206 (
207 Lee,
208 heRhoThermo,
209 rhoThermo,
210 pureMixture,
211 constRhoHThermoPhysics,
212 heRhoThermo,
213 rhoThermo,
214 pureMixture,
215 BoussinesqFluidEThermoPhysics
216 );
217
218
219 // From pure solid phase (const) to phase (Boussinesq)
220 makeInterfacePureType
221 (
222 Lee,
223 heSolidThermo,
224 solidThermo,
225 pureMixture,
226 hConstSolidThermoPhysics,
227 heRhoThermo,
228 rhoThermo,
229 pureMixture,
230 BoussinesqFluidEThermoPhysics
231 );
232
233 // From pure solid phase (const) to phase (rho const)
234 makeInterfacePureType
235 (
236 Lee,
237 heSolidThermo,
238 solidThermo,
239 pureMixture,
240 hConstSolidThermoPhysics,
241 heRhoThermo,
242 rhoThermo,
243 pureMixture,
244 constRhoHThermoPhysics
245 );
246
247 // From pure solid phase (const) to phase (tabulated)
248 makeInterfacePureType
249 (
250 Lee,
251 heSolidThermo,
252 solidThermo,
253 pureMixture,
254 hConstSolidThermoPhysics,
255 heRhoThermo,
256 rhoThermo,
257 pureMixture,
258 tabulatedThermoPhysics
259 );
260
261 // From pure solid phase (const) to phase (poly)
262 makeInterfacePureType
263 (
264 Lee,
265 heSolidThermo,
266 solidThermo,
267 pureMixture,
268 hConstSolidThermoPhysics,
269 heRhoThermo,
270 rhoThermo,
271 pureMixture,
272 icoPoly8HThermoPhysics
273 );
274
275 // From pure solid phase (poly) to flow phase (poly)
276 makeInterfacePureType
277 (
278 Lee,
279 heSolidThermo,
280 solidThermo,
281 pureMixture,
282 hPolyTranspPolyIcoSolidThermoPhysics,
283 heRhoThermo,
284 rhoThermo,
285 pureMixture,
286 icoPoly8HThermoPhysics
287 );
288
289 // From pure solid phase (poly) to flow phase (tabulated)
290 makeInterfacePureType
291 (
292 Lee,
293 heSolidThermo,
294 solidThermo,
295 pureMixture,
296 hPolyTranspPolyIcoSolidThermoPhysics,
297 heRhoThermo,
298 rhoThermo,
299 pureMixture,
300 tabulatedThermoPhysics
301 );
302
303 // From pure solid tabulated to pure tabulated flow
304 makeInterfacePureType
305 (
306 Lee,
307 heSolidThermo,
308 solidThermo,
309 pureMixture,
310 hTabulatedPolyIcoSolidThermoPhysics,
311 heRhoThermo,
312 rhoThermo,
313 pureMixture,
314 tabulatedThermoPhysics
315 );
316
317 // From pure phase (exp-Transp, hPower solidThermo) to phase (ico-rho)
318 makeInterfacePureType
319 (
320 Lee,
321 heSolidThermo,
322 solidThermo,
323 pureMixture,
324 hPowerSolidThermoPhysics,
325 heRhoThermo,
326 rhoThermo,
327 pureMixture,
328 icoPoly8HThermoPhysics
329 );
330
331
332 // From pure phase (const rho) to multi phase (incomp ideal gas)
333 makeInterfaceContSpecieMixtureType
334 (
335 Lee,
336 heRhoThermo,
337 rhoThermo,
338 pureMixture,
339 constRhoHThermoPhysics,
340 heRhoThermo,
341 rhoReactionThermo,
342 multiComponentMixture,
343 constIncompressibleGasHThermoPhysics
344 );
345
346
347 // From pure phase (Boussinesq) to phase (solidThermo)
348 makeInterfacePureType
349 (
350 Lee,
351 heRhoThermo,
352 rhoThermo,
353 pureMixture,
354 BoussinesqFluidEThermoPhysics,
355 heSolidThermo,
356 solidThermo,
357 pureMixture,
358 hConstSolidThermoPhysics
359 );
360
361 // From pure phase (rho const) to phase (solidThermo)
362 makeInterfacePureType
363 (
364 Lee,
365 heRhoThermo,
366 rhoThermo,
367 pureMixture,
368 constRhoHThermoPhysics,
369 heSolidThermo,
370 solidThermo,
371 pureMixture,
372 hConstSolidThermoPhysics
373 );
374
375 //From pure phase (poly) to solid phase (exp)
376 makeInterfacePureType
377 (
378 Lee,
379 heRhoThermo,
380 rhoThermo,
381 pureMixture,
382 icoPoly8HThermoPhysics,
383 heSolidThermo,
384 solidThermo,
385 pureMixture,
386 hPowerSolidThermoPhysics
387 );
388
389 //From pure phase (poly) to solid phase (poly)
390 makeInterfacePureType
391 (
392 Lee,
393 heRhoThermo,
394 rhoThermo,
395 pureMixture,
396 icoPoly8HThermoPhysics,
397 heSolidThermo,
398 solidThermo,
399 pureMixture,
400 hPolyTranspPolyIcoSolidThermoPhysics
401 );
402
403 //From pure phase (poly) to solid phase (const)
404 makeInterfacePureType
405 (
406 Lee,
407 heRhoThermo,
408 rhoThermo,
409 pureMixture,
410 icoPoly8HThermoPhysics,
411 heSolidThermo,
412 solidThermo,
413 pureMixture,
414 hConstSolidThermoPhysics
415 );
416
417 //From pure phase (tabulated) to solid phase (poly)
418 makeInterfacePureType
419 (
420 Lee,
421 heRhoThermo,
422 rhoThermo,
423 pureMixture,
424 tabulatedThermoPhysics,
425 heSolidThermo,
426 solidThermo,
427 pureMixture,
428 hPolyTranspPolyIcoSolidThermoPhysics
429 );
430
431 //From pure phase (tabulated) to solid phase (const)
432 makeInterfacePureType
433 (
434 Lee,
435 heRhoThermo,
436 rhoThermo,
437 pureMixture,
438 tabulatedThermoPhysics,
439 heSolidThermo,
440 solidThermo,
441 pureMixture,
442 hConstSolidThermoPhysics
443 );
444
445 makeInterfacePureType
446 (
447 Lee,
448 heRhoThermo,
449 rhoThermo,
450 pureMixture,
451 constRhoHThermoPhysics,
452 heSolidThermo,
453 solidThermo,
454 pureMixture,
455 hTabulatedPolyIcoSolidThermoPhysics
456 );
457
458 makeInterfacePureType
459 (
460 Lee,
461 heRhoThermo,
462 rhoThermo,
463 pureMixture,
464 tabulatedThermoPhysics,
465 heSolidThermo,
466 solidThermo,
467 pureMixture,
468 hTabulatedPolyIcoSolidThermoPhysics
469 );
470
471 makeInterfacePureType
472 (
473 Lee,
474 heRhoThermo,
475 rhoThermo,
476 pureMixture,
477 icoPoly8HThermoPhysics,
478 heSolidThermo,
479 solidThermo,
480 pureMixture,
481 hTabulatedPolyIcoSolidThermoPhysics
482 );
483
484 // From pure phase (tabulated) to solid phase (icoTabulated)
485 makeInterfacePureType
486 (
487 Lee,
488 heRhoThermo,
489 rhoThermo,
490 pureMixture,
491 tabulatedThermoPhysics,
492 heSolidThermo,
493 solidThermo,
494 pureMixture,
495 hTabulatedIcoTabulatedSolidThermoPhysics
496 );
497
498 // From solid phase (icoTabulated) to pure phase (tabulated)
499 makeInterfacePureType
500 (
501 Lee,
502 heSolidThermo,
503 solidThermo,
504 pureMixture,
505 hTabulatedIcoTabulatedSolidThermoPhysics,
506 heRhoThermo,
507 rhoThermo,
508 pureMixture,
509 tabulatedThermoPhysics
510 );
511
512
513 // interfaceHeatResistance model definitions
514
515 // From pure phase (rho const) to phase (rho const)
516 makeInterfacePureType
517 (
518 interfaceHeatResistance,
519 heRhoThermo,
520 rhoThermo,
521 pureMixture,
522 constRhoHThermoPhysics,
523 heRhoThermo,
524 rhoThermo,
525 pureMixture,
526 constRhoHThermoPhysics
527 );
528
529 // From pure phase (rho const) to phase (Boussinesq)
530 makeInterfacePureType
531 (
532 interfaceHeatResistance,
533 heRhoThermo,
534 rhoThermo,
535 pureMixture,
536 constRhoHThermoPhysics,
537 heRhoThermo,
538 rhoThermo,
539 pureMixture,
540 BoussinesqFluidEThermoPhysics
541 );
542
543
544 // From pure phase (solidThermo) to phase (Boussinesq)
545 makeInterfacePureType
546 (
547 interfaceHeatResistance,
548 heSolidThermo,
549 solidThermo,
550 pureMixture,
551 hConstSolidThermoPhysics,
552 heRhoThermo,
553 rhoThermo,
554 pureMixture,
555 BoussinesqFluidEThermoPhysics
556 );
557
558 // From pure phase (solidThermo) to phase (rho const)
559 makeInterfacePureType
560 (
561 interfaceHeatResistance,
562 heSolidThermo,
563 solidThermo,
564 pureMixture,
565 hConstSolidThermoPhysics,
566 heRhoThermo,
567 rhoThermo,
568 pureMixture,
569 constRhoHThermoPhysics
570 );
571
572 // From pure phase (all-poly solidThermo) to phase (ico-rho)
573 makeInterfacePureType
574 (
575 interfaceHeatResistance,
576 heSolidThermo,
577 solidThermo,
578 pureMixture,
579 hPolyTranspPolyIcoSolidThermoPhysics,
580 heRhoThermo,
581 rhoThermo,
582 pureMixture,
583 icoPoly8HThermoPhysics
584 );
585
586 // From pure phase (exp-Transp, hPower solidThermo) to phase (ico-rho)
587 makeInterfacePureType
588 (
589 interfaceHeatResistance,
590 heSolidThermo,
591 solidThermo,
592 pureMixture,
593 hPowerSolidThermoPhysics,
594 heRhoThermo,
595 rhoThermo,
596 pureMixture,
597 icoPoly8HThermoPhysics
598 );
599
600
601 // From pure phase (const rho) to multi phase (incomp ideal gas)
602 makeInterfaceContSpecieMixtureType
603 (
604 interfaceHeatResistance,
605 heRhoThermo,
606 rhoThermo,
607 pureMixture,
608 constRhoHThermoPhysics,
609 heRhoThermo,
610 rhoReactionThermo,
611 multiComponentMixture,
612 constIncompressibleGasHThermoPhysics
613 );
614
615
616 // From pure phase (Boussinesq) to phase (solidThermo)
617 makeInterfacePureType
618 (
619 interfaceHeatResistance,
620 heRhoThermo,
621 rhoThermo,
622 pureMixture,
623 BoussinesqFluidEThermoPhysics,
624 heSolidThermo,
625 solidThermo,
626 pureMixture,
627 hConstSolidThermoPhysics
628 );
629
630 // From pure phase (rho const) to phase (solidThermo)
631 makeInterfacePureType
632 (
633 interfaceHeatResistance,
634 heRhoThermo,
635 rhoThermo,
636 pureMixture,
637 constRhoHThermoPhysics,
638 heSolidThermo,
639 solidThermo,
640 pureMixture,
641 hConstSolidThermoPhysics
642 );
643
644 //From pure liquid phase (ico-rho) to pure phase (exp-Transp, hPower solidThermo)
645 makeInterfacePureType
646 (
647 interfaceHeatResistance,
648 heRhoThermo,
649 rhoThermo,
650 pureMixture,
651 icoPoly8HThermoPhysics,
652 heSolidThermo,
653 solidThermo,
654 pureMixture,
655 hPowerSolidThermoPhysics
656 );
657
658
659 // interfaceOxideRate model definitions
660
661 // From pure phase (tabulated) to solid phase (const)
662 makeInterfacePureType
663 (
664 interfaceOxideRate,
665 heRhoThermo,
666 rhoThermo,
667 pureMixture,
668 tabulatedThermoPhysics,
669 heSolidThermo,
670 solidThermo,
671 pureMixture,
672 hConstSolidThermoPhysics
673 );
674
675 // From pure phase (rho const) to phase (rho const)
676 makeInterfacePureType
677 (
678 interfaceOxideRate,
679 heRhoThermo,
680 rhoThermo,
681 pureMixture,
682 constRhoHThermoPhysics,
683 heRhoThermo,
684 rhoThermo,
685 pureMixture,
686 constRhoHThermoPhysics
687 );
688
689 // From pure phase (ico) to solid phase (const)
690 makeInterfacePureType
691 (
692 interfaceOxideRate,
693 heRhoThermo,
694 rhoThermo,
695 pureMixture,
696 icoPoly8HThermoPhysics,
697 heSolidThermo,
698 solidThermo,
699 pureMixture,
700 hConstSolidThermoPhysics
701 );
702
703 // From pure phase (tabulated) to phase (rho const)
704 makeInterfacePureType
705 (
706 interfaceOxideRate,
707 heRhoThermo,
708 rhoThermo,
709 pureMixture,
710 tabulatedThermoPhysics,
711 heRhoThermo,
712 rhoThermo,
713 pureMixture,
714 constRhoHThermoPhysics
715 );
716
717 // From pure phase (ico) to phase (rho const)
718 makeInterfacePureType
719 (
720 interfaceOxideRate,
721 heRhoThermo,
722 rhoThermo,
723 pureMixture,
724 icoPoly8HThermoPhysics,
725 heRhoThermo,
726 rhoThermo,
727 pureMixture,
728 constRhoHThermoPhysics
729 );
730
731
732 // diffusionGasEvaporation model definitions
733
734 // From pure liquid (rhoConst) to a multi-component gas incomp phase
735 makeInterfaceContSpecieMixtureType
736 (
737 diffusionGasEvaporation,
738 heRhoThermo,
739 rhoThermo,
740 pureMixture,
741 constRhoHThermoPhysics,
742 heRhoThermo,
743 rhoReactionThermo,
744 multiComponentMixture,
745 constIncompressibleGasHThermoPhysics
746 );
747
748
749 // From pure liquid (BoussinesqFluid) to a multi-component gas incomp
750 // phase
751 makeInterfaceContSpecieMixtureType
752 (
753 diffusionGasEvaporation,
754 heRhoThermo,
755 rhoThermo,
756 pureMixture,
757 BoussinesqFluidEThermoPhysics,
758 heRhoThermo,
759 rhoReactionThermo,
760 multiComponentMixture,
761 constIncompressibleGasHThermoPhysics
762 );
763}
764
765
766// ************************************************************************* //
addToRunTimeSelectionTable.H
Macros for easy insertion into run-time selection tables.
Foam::Boussinesq
Incompressible gas equation of state using the Boussinesq approximation for the density as a function...
Definition: Boussinesq.H:96
Foam::constIsoSolidTransport
Constant properties Transport package. Templated into a given thermodynamics package (needed for ther...
Definition: constIsoSolidTransport.H:76
Foam::constTransport
Constant properties Transport package. Templated into a given thermodynamics package (needed for ther...
Definition: constTransport.H:85
Foam::exponentialSolidTransport
Exponential properties for solid heat transport Templated into a given thermodynamics package.
Definition: exponentialSolidTransport.H:74
Foam::hConstThermo
Constant properties thermodynamics package templated into the EquationOfState.
Definition: hConstThermo.H:91
Foam::heRhoThermo
Energy for a mixture based on density.
Definition: heRhoThermo.H:56
Foam::heSolidThermo
Energy for a solid mixture.
Definition: heSolidThermo.H:55
Foam::meltingEvaporationModels::Lee
Mass transfer Lee model. Simple model driven by field value difference as:
Definition: Lee.H:134
Foam::meltingEvaporationModels::diffusionGasEvaporation
Gas diffusion based evaporation/condensation mass transfer model.
Definition: diffusionGasEvaporation.H:188
Foam::meltingEvaporationModels::interfaceHeatResistance
Interface Heat Resistance type of condensation/saturation model using spread source distribution foll...
Definition: interfaceHeatResistance.H:130
Foam::meltingEvaporationModels::interfaceOxideRate
The interfaceOxideRate is a simple model to calculate the formation rate of oxide inclusions (mDotOxi...
Definition: interfaceOxideRate.H:230
Foam::meltingEvaporationModels::kineticGasEvaporation
Considering the Hertz Knudsen formula, which gives the evaporation-condensation flux based on the kin...
Definition: kineticGasEvaporation.H:208
Foam::multiComponentMixture
Foam::multiComponentMixture.
Definition: multiComponentMixture.H:59
Foam::polynomialSolidTransport
Transport package using polynomial functions for solid kappa.
Definition: polynomialSolidTransport.H:116
Foam::polynomialTransport
Transport package using polynomial functions for mu and kappa.
Definition: polynomialTransport.H:130
Foam::pureMixture
Foam::pureMixture.
Definition: pureMixture.H:54
Foam::rhoReactionThermo
Foam::rhoReactionThermo.
Definition: rhoReactionThermo.H:63
Foam::rhoThermo
Basic thermodynamic properties based on density.
Definition: rhoThermo.H:58
Foam::sensibleEnthalpy
Thermodynamics mapping class to expose the sensible enthalpy functions.
Definition: sensibleEnthalpy.H:50
Foam::solidThermo
Fundamental solid thermodynamic properties.
Definition: solidThermo.H:55
Foam::tabulatedSolidTransport
Transport properties package using non-uniform tabulated data for thermal conductivity vs temperature...
Definition: tabulatedSolidTransport.H:92
Foam::tabulatedTransport
Transport properties package using non-uniform tabulated data for viscosity and thermal conductivity ...
Definition: tabulatedTransport.H:103
makeInterfaceContSpecieMixtureType
#define makeInterfaceContSpecieMixtureType(Type, Thermo, Comp, Mix, Phys, OtherThermo, OtherComp, OtherMix, OtherPhys)
Definition: InterfaceCompositionModel.H:200
makeInterfacePureType
#define makeInterfacePureType(Type, Thermo, Comp, Mix, Phys, OtherThermo, OtherComp, OtherMix, OtherPhys)
Definition: InterfaceCompositionModel.H:217
Foam
Namespace for OpenFOAM.
Definition: atmBoundaryLayer.C:34
Foam::constRhoHThermoPhysics
constTransport< species::thermo< hConstThermo< rhoConst< specie > >, sensibleEnthalpy > > constRhoHThermoPhysics
Definition: InterfaceCompositionModels.C:72
Foam::BoussinesqFluidEThermoPhysics
constTransport< species::thermo< hConstThermo< Boussinesq< specie > >, sensibleEnthalpy > > BoussinesqFluidEThermoPhysics
Definition: InterfaceCompositionModels.C:86
solidThermoPhysicsTypes.H
Type definitions for solid-thermo-physics models.
thermoPhysicsTypes.H
Type definitions for thermo-physics models.