/ClassicalField/Diffusion/DiffusionConstantSource/src/DiffusionConstantSourceExample.f90

http://github.com/xyan075/examples · Fortran Modern · 398 lines · 186 code · 69 blank · 143 comment · 0 complexity · fb20d79f0c50f6f46fd90f11906906f0 MD5 · raw file

  1. !> \file
  2. !> \author Chris Bradley
  3. !> \brief This is an example program to solve a diffusion equation using openCMISS calls.
  4. !>
  5. !> \section LICENSE
  6. !>
  7. !> Version: MPL 1.1/GPL 2.0/LGPL 2.1
  8. !>
  9. !> The contents of this file are subject to the Mozilla Public License
  10. !> Version 1.1 (the "License"); you may not use this file except in
  11. !> compliance with the License. You may obtain a copy of the License at
  12. !> http://www.mozilla.org/MPL/
  13. !>
  14. !> Software distributed under the License is distributed on an "AS IS"
  15. !> basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
  16. !> License for the specific language governing rights and limitations
  17. !> under the License.
  18. !>
  19. !> The Original Code is openCMISS
  20. !>
  21. !> The Initial Developer of the Original Code is University of Auckland,
  22. !> Auckland, New Zealand and University of Oxford, Oxford, United
  23. !> Kingdom. Portions created by the University of Auckland and University
  24. !> of Oxford are Copyright (C) 2007 by the University of Auckland and
  25. !> the University of Oxford. All Rights Reserved.
  26. !>
  27. !> Contributor(s):
  28. !>
  29. !> Alternatively, the contents of this file may be used under the terms of
  30. !> either the GNU General Public License Version 2 or later (the "GPL"), or
  31. !> the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  32. !> in which case the provisions of the GPL or the LGPL are applicable instead
  33. !> of those above. If you wish to allow use of your version of this file only
  34. !> under the terms of either the GPL or the LGPL, and not to allow others to
  35. !> use your version of this file under the terms of the MPL, indicate your
  36. !> decision by deleting the provisions above and replace them with the notice
  37. !> and other provisions required by the GPL or the LGPL. If you do not delete
  38. !> the provisions above, a recipient may use your version of this file under
  39. !> the terms of any one of the MPL, the GPL or the LGPL.
  40. !>
  41. !> \example ClassicalField/Diffusion/DiffusionConstantSource/src/DiffusionConstantSourceExample.f90
  42. !! Example program to solve a diffusion equation using openCMISS calls.
  43. !! \htmlinclude ClassicalField/Diffusion/DiffusionConstantSource/history.html
  44. !<
  45. !> Main program
  46. PROGRAM DIFFUSIONCONSTANTSOURCEEXAMPLE
  47. USE OPENCMISS
  48. USE MPI
  49. #ifdef WIN32
  50. USE IFQWIN
  51. #endif
  52. IMPLICIT NONE
  53. INTEGER(CMISSIntg), PARAMETER :: EquationsSetFieldUserNumber=1337
  54. TYPE(CMISSFieldType) :: EquationsSetField
  55. !Test program parameters
  56. REAL(CMISSDP), PARAMETER :: HEIGHT=1.0_CMISSDP
  57. REAL(CMISSDP), PARAMETER :: WIDTH=1.0_CMISSDP
  58. REAL(CMISSDP), PARAMETER :: LENGTH=1.0_CMISSDP
  59. INTEGER(CMISSIntg), PARAMETER :: CoordinateSystemUserNumber=1
  60. INTEGER(CMISSIntg), PARAMETER :: RegionUserNumber=2
  61. INTEGER(CMISSIntg), PARAMETER :: BasisUserNumber=3
  62. INTEGER(CMISSIntg), PARAMETER :: GeneratedMeshUserNumber=4
  63. INTEGER(CMISSIntg), PARAMETER :: MeshUserNumber=5
  64. INTEGER(CMISSIntg), PARAMETER :: DecompositionUserNumber=6
  65. INTEGER(CMISSIntg), PARAMETER :: GeometricFieldUserNumber=7
  66. INTEGER(CMISSIntg), PARAMETER :: DependentFieldUserNumber=8
  67. INTEGER(CMISSIntg), PARAMETER :: MaterialsFieldUserNumber=9
  68. INTEGER(CMISSIntg), PARAMETER :: EquationsSetUserNumber=10
  69. INTEGER(CMISSIntg), PARAMETER :: ProblemUserNumber=11
  70. INTEGER(CMISSIntg), PARAMETER :: ControlLoopNode=0
  71. INTEGER(CMISSIntg), PARAMETER :: SourceFieldUserNumber=12
  72. INTEGER(CMISSIntg), PARAMETER :: AnalyticFieldUserNumber=13
  73. !Program types
  74. !Program variables
  75. INTEGER(CMISSIntg) :: NUMBER_GLOBAL_X_ELEMENTS,NUMBER_GLOBAL_Y_ELEMENTS,NUMBER_GLOBAL_Z_ELEMENTS
  76. INTEGER(CMISSIntg) :: NUMBER_OF_DOMAINS
  77. INTEGER(CMISSIntg) :: MPI_IERROR
  78. !CMISS variables
  79. TYPE(CMISSBasisType) :: Basis
  80. TYPE(CMISSBoundaryConditionsType) :: BoundaryConditions
  81. TYPE(CMISSCoordinateSystemType) :: CoordinateSystem,WorldCoordinateSystem
  82. TYPE(CMISSDecompositionType) :: Decomposition
  83. TYPE(CMISSEquationsType) :: Equations
  84. TYPE(CMISSEquationsSetType) :: EquationsSet
  85. TYPE(CMISSFieldType) :: GeometricField,DependentField,MaterialsField,SourceField,AnalyticField
  86. TYPE(CMISSFieldsType) :: Fields
  87. TYPE(CMISSGeneratedMeshType) :: GeneratedMesh
  88. TYPE(CMISSMeshType) :: Mesh
  89. TYPE(CMISSProblemType) :: Problem
  90. TYPE(CMISSControlLoopType) :: ControlLoop
  91. TYPE(CMISSRegionType) :: Region,WorldRegion
  92. TYPE(CMISSSolverType) :: Solver, LinearSolver
  93. TYPE(CMISSSolverEquationsType) :: SolverEquations
  94. LOGICAL :: EXPORT_FIELD,IMPORT_FIELD
  95. #ifdef WIN32
  96. !Quickwin type
  97. LOGICAL :: QUICKWIN_STATUS=.FALSE.
  98. TYPE(WINDOWCONFIG) :: QUICKWIN_WINDOW_CONFIG
  99. #endif
  100. !Generic CMISS variables
  101. INTEGER(CMISSIntg) :: EquationsSetIndex
  102. INTEGER(CMISSIntg) :: FirstNodeNumber,LastNodeNumber
  103. INTEGER(CMISSIntg) :: Err
  104. #ifdef WIN32
  105. !Initialise QuickWin
  106. QUICKWIN_WINDOW_CONFIG%TITLE="General Output" !Window title
  107. QUICKWIN_WINDOW_CONFIG%NUMTEXTROWS=-1 !Max possible number of rows
  108. QUICKWIN_WINDOW_CONFIG%MODE=QWIN$SCROLLDOWN
  109. !Set the window parameters
  110. QUICKWIN_STATUS=SETWINDOWCONFIG(QUICKWIN_WINDOW_CONFIG)
  111. !If attempt fails set with system estimated values
  112. IF(.NOT.QUICKWIN_STATUS) QUICKWIN_STATUS=SETWINDOWCONFIG(QUICKWIN_WINDOW_CONFIG)
  113. #endif
  114. !Intialise OpenCMISS
  115. CALL CMISSInitialise(WorldCoordinateSystem,WorldRegion,Err)
  116. CALL CMISSErrorHandlingModeSet(CMISS_ERRORS_TRAP_ERROR,Err)
  117. NUMBER_GLOBAL_X_ELEMENTS=10
  118. NUMBER_GLOBAL_Y_ELEMENTS=10
  119. NUMBER_GLOBAL_Z_ELEMENTS=10
  120. NUMBER_OF_DOMAINS=1
  121. CALL MPI_BCAST(NUMBER_GLOBAL_X_ELEMENTS,1,MPI_INTEGER,0,MPI_COMM_WORLD,MPI_IERROR)
  122. CALL MPI_BCAST(NUMBER_GLOBAL_Y_ELEMENTS,1,MPI_INTEGER,0,MPI_COMM_WORLD,MPI_IERROR)
  123. CALL MPI_BCAST(NUMBER_GLOBAL_Z_ELEMENTS,1,MPI_INTEGER,0,MPI_COMM_WORLD,MPI_IERROR)
  124. CALL MPI_BCAST(NUMBER_OF_DOMAINS,1,MPI_INTEGER,0,MPI_COMM_WORLD,MPI_IERROR)
  125. !Start the creation of a new RC coordinate system
  126. CALL CMISSCoordinateSystem_Initialise(CoordinateSystem,Err)
  127. CALL CMISSCoordinateSystem_CreateStart(CoordinateSystemUserNumber,CoordinateSystem,Err)
  128. IF(NUMBER_GLOBAL_Z_ELEMENTS==0) THEN
  129. !Set the coordinate system to be 2D
  130. CALL CMISSCoordinateSystem_DimensionSet(CoordinateSystem,2,Err)
  131. ELSE
  132. !Set the coordinate system to be 3D
  133. CALL CMISSCoordinateSystem_DimensionSet(CoordinateSystem,3,Err)
  134. ENDIF
  135. !Finish the creation of the coordinate system
  136. CALL CMISSCoordinateSystem_CreateFinish(CoordinateSystem,Err)
  137. !Start the creation of the region
  138. CALL CMISSRegion_Initialise(Region,Err)
  139. CALL CMISSRegion_CreateStart(RegionUserNumber,WorldRegion,Region,Err)
  140. !Set the regions coordinate system to the 2D RC coordinate system that we have created
  141. CALL CMISSRegion_CoordinateSystemSet(Region,CoordinateSystem,Err)
  142. !Finish the creation of the region
  143. CALL CMISSRegion_CreateFinish(Region,Err)
  144. !Start the creation of a basis (default is trilinear lagrange)
  145. CALL CMISSBasis_Initialise(Basis,Err)
  146. CALL CMISSBasis_CreateStart(BasisUserNumber,Basis,Err)
  147. IF(NUMBER_GLOBAL_Z_ELEMENTS==0) THEN
  148. !Set the basis to be a bilinear Lagrange basis
  149. CALL CMISSBasis_NumberOfXiSet(Basis,2,Err)
  150. ELSE
  151. !Set the basis to be a trilinear Lagrange basis
  152. CALL CMISSBasis_NumberOfXiSet(Basis,3,Err)
  153. ENDIF
  154. !Finish the creation of the basis
  155. CALL CMISSBasis_CreateFinish(BASIS,Err)
  156. !Start the creation of a generated mesh in the region
  157. CALL CMISSGeneratedMesh_Initialise(GeneratedMesh,Err)
  158. CALL CMISSGeneratedMesh_CreateStart(GeneratedMeshUserNumber,Region,GeneratedMesh,Err)
  159. !Set up a regular x*y*z mesh
  160. CALL CMISSGeneratedMesh_TypeSet(GeneratedMesh,CMISS_GENERATED_MESH_REGULAR_MESH_TYPE,Err)
  161. !Set the default basis
  162. CALL CMISSGeneratedMesh_BasisSet(GeneratedMesh,Basis,Err)
  163. !Define the mesh on the region
  164. IF(NUMBER_GLOBAL_Z_ELEMENTS==0) THEN
  165. CALL CMISSGeneratedMesh_ExtentSet(GeneratedMesh,(/WIDTH,HEIGHT/),Err)
  166. CALL CMISSGeneratedMesh_NumberOfElementsSet(GeneratedMesh,(/NUMBER_GLOBAL_X_ELEMENTS,NUMBER_GLOBAL_Y_ELEMENTS/),Err)
  167. ELSE
  168. CALL CMISSGeneratedMesh_ExtentSet(GeneratedMesh,(/WIDTH,HEIGHT,LENGTH/),Err)
  169. CALL CMISSGeneratedMesh_NumberOfElementsSet(GeneratedMesh,(/NUMBER_GLOBAL_X_ELEMENTS,NUMBER_GLOBAL_Y_ELEMENTS, &
  170. & NUMBER_GLOBAL_Z_ELEMENTS/),Err)
  171. ENDIF
  172. !Finish the creation of a generated mesh in the region
  173. CALL CMISSMesh_Initialise(Mesh,Err)
  174. CALL CMISSGeneratedMesh_CreateFinish(GeneratedMesh,MeshUserNumber,Mesh,Err)
  175. !Create a decomposition
  176. CALL CMISSDecomposition_Initialise(Decomposition,Err)
  177. CALL CMISSDecomposition_CreateStart(DecompositionUserNumber,Mesh,Decomposition,Err)
  178. !Set the decomposition to be a general decomposition with the specified number of domains
  179. CALL CMISSDecomposition_TypeSet(Decomposition,CMISS_DECOMPOSITION_CALCULATED_TYPE,Err)
  180. CALL CMISSDecomposition_NumberOfDomainsSet(Decomposition,NUMBER_OF_DOMAINS,Err)
  181. !Finish the decomposition
  182. CALL CMISSDecomposition_CreateFinish(Decomposition,Err)
  183. !Start to create a default (geometric) field on the region
  184. CALL CMISSField_Initialise(GeometricField,Err)
  185. CALL CMISSField_CreateStart(GeometricFieldUserNumber,Region,GeometricField,Err)
  186. !Set the decomposition to use
  187. CALL CMISSField_MeshDecompositionSet(GeometricField,Decomposition,Err)
  188. !Set the domain to be used by the field components.
  189. CALL CMISSField_ComponentMeshComponentSet(GeometricField,CMISS_FIELD_U_VARIABLE_TYPE,1,1,Err)
  190. CALL CMISSField_ComponentMeshComponentSet(GeometricField,CMISS_FIELD_U_VARIABLE_TYPE,2,1,Err)
  191. IF(NUMBER_GLOBAL_Z_ELEMENTS/=0) THEN
  192. CALL CMISSField_ComponentMeshComponentSet(GeometricField,CMISS_FIELD_U_VARIABLE_TYPE,3,1,Err)
  193. ENDIF
  194. !Finish creating the field
  195. CALL CMISSField_CreateFinish(GeometricField,Err)
  196. !Update the geometric field parameters
  197. CALL CMISSGeneratedMesh_GeometricParametersCalculate(GeneratedMesh,GeometricField,Err)
  198. ! ENDIF
  199. !IF(.NOT.ASSOCIATED(GEOMETRIC_FIELD)) GEOMETRIC_FIELD=>REGION%FIELDS%FIELDS(1)%PTR
  200. !Create the equations_set
  201. CALL CMISSEquationsSet_Initialise(EquationsSet,Err)
  202. CALL CMISSField_Initialise(EquationsSetField,Err)
  203. CALL CMISSEquationsSet_CreateStart(EquationsSetUserNumber,Region,GeometricField,CMISS_EQUATIONS_SET_CLASSICAL_FIELD_CLASS, &
  204. & CMISS_EQUATIONS_SET_DIFFUSION_EQUATION_TYPE,CMISS_EQUATIONS_SET_CONSTANT_SOURCE_DIFFUSION_SUBTYPE, &
  205. & EquationsSetFieldUserNumber, &
  206. & EquationsSetField,EquationsSet,Err)
  207. !Set the equations set to be a standard Laplace problem
  208. !Finish creating the equations set
  209. CALL CMISSEquationsSet_CreateFinish(EquationsSet,Err)
  210. !Create the equations set dependent field variables
  211. CALL CMISSField_Initialise(DependentField,Err)
  212. CALL CMISSEquationsSet_DependentCreateStart(EquationsSet,DependentFieldUserNumber,DependentField,Err)
  213. !Finish the equations set dependent field variables
  214. CALL CMISSEquationsSet_DependentCreateFinish(EquationsSet,Err)
  215. !Create the equations set material field variables
  216. CALL CMISSField_Initialise(MaterialsField,Err)
  217. CALL CMISSEquationsSet_MaterialsCreateStart(EquationsSet,MaterialsFieldUserNumber,MaterialsField,Err)
  218. !Finish the equations set dependent field variables
  219. CALL CMISSEquationsSet_MaterialsCreateFinish(EquationsSet,Err)
  220. !Create the equations set source field variables
  221. CALL CMISSField_Initialise(SourceField,Err)
  222. CALL CMISSEquationsSet_SourceCreateStart(EquationsSet,SourceFieldUserNumber,SourceField,Err)
  223. !Finish the equations set dependent field variables
  224. CALL CMISSEquationsSet_SourceCreateFinish(EquationsSet,Err)
  225. !Create the equations set analytic field variables
  226. CALL CMISSField_Initialise(AnalyticField,Err)
  227. CALL CMISSEquationsSet_AnalyticCreateStart(EquationsSet,CMISS_EQUATIONS_SET_DIFFUSION_EQUATION_THREE_DIM_1, &
  228. & AnalyticFieldUserNumber, &
  229. & AnalyticField,Err)
  230. !Finish the equations set analytic field variables
  231. CALL CMISSEquationsSet_AnalyticCreateFinish(EquationsSet,Err)
  232. !Create the equations set equations
  233. CALL CMISSEquations_Initialise(Equations,Err)
  234. CALL CMISSEquationsSet_EquationsCreateStart(EquationsSet,Equations,Err)
  235. !Set the equations matrices sparsity type
  236. CALL CMISSEquations_SparsityTypeSet(Equations,CMISS_EQUATIONS_SPARSE_MATRICES,Err)
  237. !Set the equations set output
  238. CALL CMISSEquations_OutputTypeSet(Equations,CMISS_EQUATIONS_NO_OUTPUT,Err)
  239. !CALL CMISSEquations_OutputTypeSet(Equations,CMISS_EQUATIONS_TIMING_OUTPUT,Err)
  240. !CALL CMISSEquations_OutputTypeSet(Equations,CMISS_EQUATIONS_MATRIX_OUTPUT,Err)
  241. !CALL CMISSEquations_OutputTypeSet(Equations,CMISS_EQUATIONS_ELEMENT_MATRIX_OUTPUT,Err)
  242. !Finish the equations set equations
  243. CALL CMISSEquationsSet_EquationsCreateFinish(EquationsSet,Err)
  244. !Create the equations set boundary conditions
  245. ! CALL CMISSBoundaryConditions_Initialise(BoundaryConditions,Err)
  246. ! CALL CMISSEquationsSetBoundaryConditionsCreateStart(EquationsSet,BoundaryConditions,Err)
  247. ! !Set the first node to 0.0 and the last node to 1.0
  248. ! ! FirstNodeNumber=1
  249. ! ! IF(NUMBER_GLOBAL_Z_ELEMENTS==0) THEN
  250. ! ! LastNodeNumber=(NUMBER_GLOBAL_X_ELEMENTS+1)*(NUMBER_GLOBAL_Y_ELEMENTS+1)
  251. ! ! ELSE
  252. ! ! LastNodeNumber=(NUMBER_GLOBAL_X_ELEMENTS+1)*(NUMBER_GLOBAL_Y_ELEMENTS+1)*(NUMBER_GLOBAL_Z_ELEMENTS+1)
  253. ! ! ENDIF
  254. ! ! CALL CMISSBoundaryConditions_SetNode(BoundaryConditions,CMISS_FIELD_U_VARIABLE_TYPE,1,FirstNodeNumber,1, &
  255. ! ! & CMISS_BOUNDARY_CONDITION_FIXED,0.0_CMISSDP,Err)
  256. ! ! CALL CMISSBoundaryConditions_SetNode(BoundaryConditions,CMISS_FIELD_DELUDELN_VARIABLE_TYPE,1,LastNodeNumber,1, &
  257. ! ! & CMISS_BOUNDARY_CONDITION_FIXED,1.0_CMISSDP,Err)
  258. ! !Finish the creation of the equations set boundary conditions
  259. ! CALL CMISSEquationsSetBoundaryConditionsCreateFinish(EquationsSet,Err)
  260. !Create the problem
  261. CALL CMISSProblem_Initialise(Problem,Err)
  262. CALL CMISSProblem_CreateStart(ProblemUserNumber,Problem,Err)
  263. !Set the problem to be a linear source Diffusion problem
  264. CALL CMISSProblem_SpecificationSet(Problem,CMISS_PROBLEM_CLASSICAL_FIELD_CLASS,CMISS_PROBLEM_DIFFUSION_EQUATION_TYPE, &
  265. & CMISS_PROBLEM_LINEAR_SOURCE_DIFFUSION_SUBTYPE,Err)
  266. !Finish the creation of a problem.
  267. CALL CMISSProblem_CreateFinish(Problem,Err)
  268. !Create the problem control
  269. CALL CMISSProblem_ControlLoopCreateStart(Problem,Err)
  270. CALL CMISSControlLoop_Initialise(ControlLoop,Err)
  271. !Get the control loop
  272. CALL CMISSProblem_ControlLoopGet(Problem,ControlLoopNode,ControlLoop,Err)
  273. !Set the times
  274. CALL CMISSControlLoop_TimesSet(ControlLoop,0.0_CMISSDP,1.0001_CMISSDP,0.01_CMISSDP,Err)
  275. !Finish creating the problem control loop
  276. CALL CMISSProblem_ControlLoopCreateFinish(Problem,Err)
  277. !Start the creation of the problem solvers
  278. !
  279. ! ! !For the Direct Solver MUMPS, uncomment the below two lines and comment out the above five
  280. ! ! CALL SOLVER_LINEAR_TYPE_SET(LINEAR_SOLVER,SOLVER_LINEAR_DIRECT_SOLVE_TYPE,ERR,ERROR,*999)
  281. ! ! CALL SOLVER_LINEAR_DIRECT_TYPE_SET(LINEAR_SOLVER,SOLVER_DIRECT_MUMPS,ERR,ERROR,*999)
  282. !
  283. CALL CMISSSolver_Initialise(Solver,Err)
  284. CALL CMISSSolver_Initialise(LinearSolver,Err)
  285. CALL CMISSProblem_SolversCreateStart(Problem,Err)
  286. CALL CMISSProblem_SolverGet(Problem,CMISS_CONTROL_LOOP_NODE,1,Solver,Err)
  287. !CALL CMISSSolver_OutputTypeSet(Solver,CMISS_SOLVER_NO_OUTPUT,Err)
  288. !CALL CMISSSolver_OutputTypeSet(Solver,CMISS_SOLVER_PROGRESS_OUTPUT,Err)
  289. !CALL CMISSSolver_OutputTypeSet(Solver,CMISS_SOLVER_TIMING_OUTPUT,Err)
  290. !CALL CMISSSolver_OutputTypeSet(Solver,CMISS_SOLVER_MATRIX_OUTPUT,Err)
  291. CALL CMISSSolver_OutputTypeSet(Solver,CMISS_SOLVER_PROGRESS_OUTPUT,Err)
  292. CALL CMISSSolver_DynamicLinearSolverGet(Solver,LinearSolver,Err)
  293. CALL CMISSSolver_LinearIterativeMaximumIterationsSet(LinearSolver,10000,Err)
  294. !Finish the creation of the problem solver
  295. CALL CMISSProblem_SolversCreateFinish(Problem,Err)
  296. !Create the problem solver equations
  297. CALL CMISSSolver_Initialise(Solver,Err)
  298. CALL CMISSSolverEquations_Initialise(SolverEquations,Err)
  299. CALL CMISSProblem_SolverEquationsCreateStart(Problem,Err)
  300. !Get the solve equations
  301. CALL CMISSProblem_SolverGet(Problem,CMISS_CONTROL_LOOP_NODE,1,Solver,Err)
  302. CALL CMISSSolver_SolverEquationsGet(Solver,SolverEquations,Err)
  303. !Set the solver equations sparsity
  304. !CALL CMISSSolverEquations_SparsityTypeSet(SolverEquations,CMISS_SOLVER_SPARSE_MATRICES,Err)
  305. !CALL CMISSSolverEquations_SparsityTypeSet(SolverEquations,CMISS_SOLVER_FULL_MATRICES,Err)
  306. !Add in the equations set
  307. CALL CMISSSolverEquations_EquationsSetAdd(SolverEquations,EquationsSet,EquationsSetIndex,Err)
  308. !Finish the creation of the problem solver equations
  309. CALL CMISSProblem_SolverEquationsCreateFinish(Problem,Err)
  310. CALL CMISSBoundaryConditions_Initialise(BoundaryConditions,Err)
  311. CALL CMISSSolverEquations_BoundaryConditionsCreateStart(SolverEquations,BoundaryConditions,Err)
  312. CALL CMISSSolverEquations_BoundaryConditionsAnalytic(SolverEquations,Err)
  313. CALL CMISSSolverEquations_BoundaryConditionsCreateFinish(SolverEquations,Err)
  314. !Solve the problem
  315. CALL CMISSProblem_Solve(Problem,Err)
  316. !Output Analytic analysis
  317. CALL CMISSAnalyticAnalysisOutput(DependentField,"DiffusionAnalytics_x10_y10_z10_L_T1",Err)
  318. EXPORT_FIELD=.TRUE.
  319. IF(EXPORT_FIELD) THEN
  320. CALL CMISSFields_Initialise(Fields,Err)
  321. CALL CMISSFields_Create(Region,Fields,Err)
  322. CALL CMISSFields_NodesExport(Fields,"DiffusionConstantSourceAnalytic_x10_y10_z10_L_T1","FORTRAN",Err)
  323. CALL CMISSFields_ElementsExport(Fields,"DiffusionConstantSourceAnalytic_x10_y10_z10_L_T1","FORTRAN",Err)
  324. CALL CMISSFields_Finalise(Fields,Err)
  325. ENDIF
  326. !CALL CMISSFinalise(Err)
  327. WRITE(*,'(A)') "Program successfully completed."
  328. STOP
  329. END PROGRAM DIFFUSIONCONSTANTSOURCEEXAMPLE