!-------------------------------------------------------------------------------------------------- !> @author Pratheek Shanthraj, Max-Planck-Institut für Eisenforschung GmbH !> @author Martin Diehl, Max-Planck-Institut für Eisenforschung GmbH !> @author Philip Eisenlohr, Max-Planck-Institut für Eisenforschung GmbH !> @brief Basic scheme PETSc solver !-------------------------------------------------------------------------------------------------- module spectral_mech_basic use prec, only: & pInt, & pReal use math, only: & math_I3 use spectral_utilities, only: & tSolutionState, & tSolutionParams implicit none private #include character (len=*), parameter, public :: & DAMASK_spectral_SolverBasicPETSC_label = 'basicpetsc' !-------------------------------------------------------------------------------------------------- ! derived types type(tSolutionParams), private :: params !-------------------------------------------------------------------------------------------------- ! PETSc data DM, private :: da SNES, private :: snes Vec, private :: solution_vec !-------------------------------------------------------------------------------------------------- ! common pointwise data real(pReal), private, dimension(:,:,:,:,:), allocatable :: F_lastInc, Fdot !-------------------------------------------------------------------------------------------------- ! stress, stiffness and compliance average etc. real(pReal), private, dimension(3,3) :: & F_aim = math_I3, & F_aim_lastIter = math_I3, & F_aim_lastInc = math_I3, & P_av = 0.0_pReal, & F_aimDot=0.0_pReal character(len=1024), private :: incInfo real(pReal), private, dimension(3,3,3,3) :: & C_volAvg = 0.0_pReal, & !< current volume average stiffness C_volAvgLastInc = 0.0_pReal, & !< previous volume average stiffness C_minMaxAvg = 0.0_pReal, & !< current (min+max)/2 stiffness S = 0.0_pReal !< current compliance (filled up with zeros) real(pReal), private :: err_stress, err_div logical, private :: ForwardData integer(pInt), private :: & totalIter = 0_pInt !< total iteration in current increment real(pReal), private, dimension(3,3) :: mask_stress = 0.0_pReal public :: & basicPETSc_init, & basicPETSc_solution, & BasicPETSc_forward, & basicPETSc_destroy external :: & PETScFinalize, & MPI_Abort, & MPI_Bcast, & MPI_Allreduce contains !-------------------------------------------------------------------------------------------------- !> @brief allocates all neccessary fields and fills them with data, potentially from restart info !-------------------------------------------------------------------------------------------------- subroutine basicPETSc_init use, intrinsic :: iso_fortran_env ! to get compiler_version and compiler_options (at least for gfortran >4.6 at the moment) use IO, only: & IO_intOut, & IO_read_realFile, & IO_timeStamp use debug, only: & debug_level, & debug_spectral, & debug_spectralRestart use FEsolving, only: & restartInc use numerics, only: & worldrank, & worldsize use DAMASK_interface, only: & getSolverJobName use spectral_utilities, only: & Utilities_constitutiveResponse, & Utilities_updateGamma, & Utilities_updateIPcoords, & wgt use mesh, only: & grid, & grid3 use math, only: & math_invSym3333 implicit none real(pReal), dimension(3,3,grid(1),grid(2),grid3) :: P real(pReal), dimension(3,3) :: & temp33_Real = 0.0_pReal PetscErrorCode :: ierr PetscScalar, pointer, dimension(:,:,:,:) :: F integer(pInt), dimension(:), allocatable :: localK integer(pInt) :: proc character(len=1024) :: rankStr external :: & SNESCreate, & SNESSetOptionsPrefix, & DMDACreate3D, & SNESSetDM, & DMCreateGlobalVector, & DMDASNESSetFunctionLocal, & SNESGetConvergedReason, & SNESSetConvergenceTest, & SNESSetFromOptions mainProcess: if (worldrank == 0_pInt) then write(6,'(/,a)') ' <<<+- DAMASK_spectral_solverBasicPETSc init -+>>>' write(6,'(a15,a)') ' Current time: ',IO_timeStamp() #include "compilation_info.f90" endif mainProcess !-------------------------------------------------------------------------------------------------- ! allocate global fields allocate (F_lastInc (3,3,grid(1),grid(2),grid3),source = 0.0_pReal) allocate (Fdot (3,3,grid(1),grid(2),grid3),source = 0.0_pReal) !-------------------------------------------------------------------------------------------------- ! initialize solver specific parts of PETSc call SNESCreate(PETSC_COMM_WORLD,snes,ierr); CHKERRQ(ierr) call SNESSetOptionsPrefix(snes,'mech_',ierr);CHKERRQ(ierr) allocate(localK(worldsize), source = 0); localK(worldrank+1) = grid3 do proc = 1, worldsize call MPI_Bcast(localK(proc),1,MPI_INTEGER,proc-1,PETSC_COMM_WORLD,ierr) enddo call DMDACreate3d(PETSC_COMM_WORLD, & DM_BOUNDARY_NONE, DM_BOUNDARY_NONE, DM_BOUNDARY_NONE, & ! cut off stencil at boundary DMDA_STENCIL_BOX, & ! Moore (26) neighborhood around central point grid(1),grid(2),grid(3), & ! global grid 1 , 1, worldsize, & 9, 0, & ! #dof (F tensor), ghost boundary width (domain overlap) grid(1),grid(2),localK, & ! local grid da,ierr) ! handle, error CHKERRQ(ierr) call SNESSetDM(snes,da,ierr); CHKERRQ(ierr) call DMCreateGlobalVector(da,solution_vec,ierr); CHKERRQ(ierr) ! global solution vector (grid x 9, i.e. every def grad tensor) call DMDASNESSetFunctionLocal(da,INSERT_VALUES,BasicPETSC_formResidual,PETSC_NULL_OBJECT,ierr) ! residual vector of same shape as solution vector CHKERRQ(ierr) call SNESSetDM(snes,da,ierr); CHKERRQ(ierr) ! connect snes to da call SNESSetConvergenceTest(snes,BasicPETSC_converged,PETSC_NULL_OBJECT,PETSC_NULL_FUNCTION,ierr) ! specify custom convergence check function "_converged" CHKERRQ(ierr) call SNESSetFromOptions(snes,ierr); CHKERRQ(ierr) ! pull it all together with additional cli arguments !-------------------------------------------------------------------------------------------------- ! init fields call DMDAVecGetArrayF90(da,solution_vec,F,ierr); CHKERRQ(ierr) ! get the data out of PETSc to work with restart: if (restartInc > 1_pInt) then if (iand(debug_level(debug_spectral),debug_spectralRestart)/= 0 .and. worldrank == 0_pInt) & write(6,'(/,a,'//IO_intOut(restartInc-1_pInt)//',a)') & 'reading values of increment ', restartInc - 1_pInt, ' from file' flush(6) write(rankStr,'(a1,i0)')'_',worldrank call IO_read_realFile(777,'F'//trim(rankStr),trim(getSolverJobName()),size(F)) read (777,rec=1) F close (777) call IO_read_realFile(777,'F_lastInc'//trim(rankStr),trim(getSolverJobName()),size(F_lastInc)) read (777,rec=1) F_lastInc close (777) call IO_read_realFile(777,'F_aimDot',trim(getSolverJobName()),size(f_aimDot)) read (777,rec=1) f_aimDot close (777) F_aim = reshape(sum(sum(sum(F,dim=4),dim=3),dim=2) * wgt, [3,3]) ! average of F F_aim_lastInc = sum(sum(sum(F_lastInc,dim=5),dim=4),dim=3) * wgt ! average of F_lastInc elseif (restartInc == 1_pInt) then restart F_lastInc = spread(spread(spread(math_I3,3,grid(1)),4,grid(2)),5,grid3) ! initialize to identity F = reshape(F_lastInc,[9,grid(1),grid(2),grid3]) endif restart call Utilities_updateIPcoords(reshape(F,shape(F_lastInc))) call Utilities_constitutiveResponse(F_lastInc, reshape(F,shape(F_lastInc)), & 0.0_pReal, & P, & C_volAvg,C_minMaxAvg, & ! global average of stiffness and (min+max)/2 temp33_Real, & .false., & math_I3) call DMDAVecRestoreArrayF90(da,solution_vec,F,ierr); CHKERRQ(ierr) ! write data back to PETSc restartRead: if (restartInc > 1_pInt) then if (iand(debug_level(debug_spectral),debug_spectralRestart)/= 0 .and. worldrank == 0_pInt) & write(6,'(/,a,'//IO_intOut(restartInc-1_pInt)//',a)') & 'reading more values of increment', restartInc - 1_pInt, 'from file' flush(6) call IO_read_realFile(777,'C_volAvg',trim(getSolverJobName()),size(C_volAvg)) read (777,rec=1) C_volAvg close (777) call IO_read_realFile(777,'C_volAvgLastInc',trim(getSolverJobName()),size(C_volAvgLastInc)) read (777,rec=1) C_volAvgLastInc close (777) call IO_read_realFile(777,'C_ref',trim(getSolverJobName()),size(C_minMaxAvg)) read (777,rec=1) C_minMaxAvg close (777) endif restartRead call Utilities_updateGamma(C_minmaxAvg,.True.) end subroutine basicPETSc_init !-------------------------------------------------------------------------------------------------- !> @brief solution for the Basic PETSC scheme with internal iterations !-------------------------------------------------------------------------------------------------- type(tSolutionState) function & basicPETSc_solution(incInfoIn,guess,timeinc,timeinc_old,loadCaseTime,P_BC,F_BC,rotation_BC) use IO, only: & IO_error use numerics, only: & update_gamma use spectral_utilities, only: & tBoundaryCondition, & Utilities_maskedCompliance, & Utilities_updateGamma use FEsolving, only: & restartWrite, & terminallyIll implicit none !-------------------------------------------------------------------------------------------------- ! input data for solution real(pReal), intent(in) :: & timeinc, & !< increment in time for current solution timeinc_old, & !< increment in time of last increment loadCaseTime !< remaining time of current load case logical, intent(in) :: & guess type(tBoundaryCondition), intent(in) :: & P_BC, & F_BC character(len=*), intent(in) :: & incInfoIn real(pReal), dimension(3,3), intent(in) :: rotation_BC !-------------------------------------------------------------------------------------------------- ! PETSc Data PetscErrorCode :: ierr SNESConvergedReason :: reason external :: & SNESSolve, & SNESGetConvergedReason incInfo = incInfoIn !-------------------------------------------------------------------------------------------------- ! update stiffness (and gamma operator) S = Utilities_maskedCompliance(rotation_BC,P_BC%maskLogical,C_volAvg) if (update_gamma) call Utilities_updateGamma(C_minmaxAvg,restartWrite) !-------------------------------------------------------------------------------------------------- ! set module wide availabe data mask_stress = P_BC%maskFloat params%P_BC = P_BC%values params%rotation_BC = rotation_BC params%timeinc = timeinc params%timeincOld = timeinc_old !-------------------------------------------------------------------------------------------------- ! solve BVP call SNESSolve(snes,PETSC_NULL_OBJECT,solution_vec,ierr) CHKERRQ(ierr) !-------------------------------------------------------------------------------------------------- ! check convergence call SNESGetConvergedReason(snes,reason,ierr) CHKERRQ(ierr) basicPETSc_solution%termIll = terminallyIll terminallyIll = .false. BasicPETSc_solution%converged =.true. if (reason == -4) call IO_error(893_pInt) if (reason < 1) basicPETSC_solution%converged = .false. basicPETSC_solution%iterationsNeeded = totalIter end function BasicPETSc_solution !-------------------------------------------------------------------------------------------------- !> @brief forms the basic residual vector !-------------------------------------------------------------------------------------------------- subroutine BasicPETSC_formResidual(in,x_scal,f_scal,dummy,ierr) use numerics, only: & itmax, & itmin use numerics, only: & worldrank use mesh, only: & grid, & grid3 use math, only: & math_rotate_backward33, & math_transpose33, & math_mul3333xx33 use debug, only: & debug_level, & debug_spectral, & debug_spectralRotation use spectral_utilities, only: & wgt, & tensorField_real, & utilities_FFTtensorForward, & utilities_fourierGammaConvolution, & utilities_FFTtensorBackward, & Utilities_constitutiveResponse, & Utilities_divergenceRMS use IO, only: & IO_intOut use FEsolving, only: & terminallyIll implicit none DMDALocalInfo, dimension(DMDA_LOCAL_INFO_SIZE) :: & in PetscScalar, dimension(3,3, & XG_RANGE,YG_RANGE,ZG_RANGE) :: & x_scal PetscScalar, dimension(3,3, & X_RANGE,Y_RANGE,Z_RANGE) :: & f_scal PetscInt :: & PETScIter, & nfuncs PetscObject :: dummy PetscErrorCode :: ierr external :: & SNESGetNumberFunctionEvals, & SNESGetIterationNumber call SNESGetNumberFunctionEvals(snes,nfuncs,ierr); CHKERRQ(ierr) call SNESGetIterationNumber(snes,PETScIter,ierr); CHKERRQ(ierr) if(nfuncs== 0 .and. PETScIter == 0) totalIter = -1_pInt ! new increment newIteration: if(totalIter <= PETScIter) then !-------------------------------------------------------------------------------------------------- ! report begin of new iteration totalIter = totalIter + 1_pInt if (worldrank == 0_pInt) then write(6,'(1x,a,3(a,'//IO_intOut(itmax)//'))') trim(incInfo), & ' @ Iteration ', itmin, '≤',totalIter, '≤', itmax if (iand(debug_level(debug_spectral),debug_spectralRotation) /= 0) & write(6,'(/,a,/,3(3(f12.7,1x)/))',advance='no') ' deformation gradient aim (lab) =', & math_transpose33(math_rotate_backward33(F_aim,params%rotation_BC)) write(6,'(/,a,/,3(3(f12.7,1x)/))',advance='no') ' deformation gradient aim =', & math_transpose33(F_aim) flush(6) endif endif newIteration !-------------------------------------------------------------------------------------------------- ! evaluate constitutive response call Utilities_constitutiveResponse(F_lastInc,x_scal,params%timeinc, & f_scal,C_volAvg,C_minmaxAvg,P_av,ForwardData,params%rotation_BC) call MPI_Allreduce(MPI_IN_PLACE,terminallyIll,1,MPI_LOGICAL,MPI_LOR,PETSC_COMM_WORLD,ierr) ForwardData = .false. !-------------------------------------------------------------------------------------------------- ! stress BC handling F_aim_lastIter = F_aim F_aim = F_aim - math_mul3333xx33(S, ((P_av - params%P_BC))) ! S = 0.0 for no bc err_stress = maxval(abs(mask_stress * (P_av - params%P_BC))) ! mask = 0.0 for no bc !-------------------------------------------------------------------------------------------------- ! updated deformation gradient using fix point algorithm of basic scheme tensorField_real = 0.0_pReal tensorField_real(1:3,1:3,1:grid(1),1:grid(2),1:grid3) = f_scal call utilities_FFTtensorForward() err_div = Utilities_divergenceRMS() call utilities_fourierGammaConvolution(math_rotate_backward33(F_aim_lastIter-F_aim,params%rotation_BC)) call utilities_FFTtensorBackward() !-------------------------------------------------------------------------------------------------- ! constructing residual f_scal = tensorField_real(1:3,1:3,1:grid(1),1:grid(2),1:grid3) end subroutine BasicPETSc_formResidual !-------------------------------------------------------------------------------------------------- !> @brief convergence check !-------------------------------------------------------------------------------------------------- subroutine BasicPETSc_converged(snes_local,PETScIter,xnorm,snorm,fnorm,reason,dummy,ierr) use numerics, only: & itmax, & itmin, & err_div_tolRel, & err_div_tolAbs, & err_stress_tolRel, & err_stress_tolAbs, & worldrank use FEsolving, only: & terminallyIll implicit none SNES :: snes_local PetscInt :: PETScIter PetscReal :: & xnorm, & snorm, & fnorm SNESConvergedReason :: reason PetscObject :: dummy PetscErrorCode :: ierr real(pReal) :: & divTol, & stressTol divTol = max(maxval(abs(P_av))*err_div_tolRel,err_div_tolAbs) stressTol = max(maxval(abs(P_av))*err_stress_tolrel,err_stress_tolabs) converged: if ((totalIter >= itmin .and. & all([ err_div/divTol, & err_stress/stressTol ] < 1.0_pReal)) & .or. terminallyIll) then reason = 1 elseif (totalIter >= itmax) then converged reason = -1 else converged reason = 0 endif converged !-------------------------------------------------------------------------------------------------- ! report if (worldrank == 0_pInt) then write(6,'(1/,a)') ' ... reporting .............................................................' write(6,'(1/,a,f12.2,a,es8.2,a,es9.2,a)') ' error divergence = ', & err_div/divTol, ' (',err_div,' / m, tol =',divTol,')' write(6,'(a,f12.2,a,es8.2,a,es9.2,a)') ' error stress BC = ', & err_stress/stressTol, ' (',err_stress, ' Pa, tol =',stressTol,')' write(6,'(/,a)') ' ===========================================================================' flush(6) endif end subroutine BasicPETSc_converged !-------------------------------------------------------------------------------------------------- !> @brief forwarding routine !-------------------------------------------------------------------------------------------------- subroutine BasicPETSc_forward(guess,timeinc,timeinc_old,loadCaseTime,F_BC,P_BC,rotation_BC) use math, only: & math_mul33x33 ,& math_rotate_backward33 use numerics, only: & worldrank use mesh, only: & grid, & grid3 use spectral_utilities, only: & Utilities_calculateRate, & Utilities_forwardField, & Utilities_updateIPcoords, & tBoundaryCondition, & cutBack use IO, only: & IO_write_JobRealFile use FEsolving, only: & restartWrite implicit none real(pReal), intent(in) :: & timeinc_old, & timeinc, & loadCaseTime !< remaining time of current load case type(tBoundaryCondition), intent(in) :: & P_BC, & F_BC real(pReal), dimension(3,3), intent(in) :: rotation_BC logical, intent(in) :: & guess PetscErrorCode :: ierr PetscScalar, pointer :: F(:,:,:,:) character(len=1024) :: rankStr call DMDAVecGetArrayF90(da,solution_vec,F,ierr) !-------------------------------------------------------------------------------------------------- ! restart information for spectral solver if (restartWrite) then if (worldrank == 0_pInt) then write(6,'(/,a)') ' writing converged results for restart' flush(6) endif write(rankStr,'(a1,i0)')'_',worldrank call IO_write_jobRealFile(777,'F'//trim(rankStr),size(F)) ! writing deformation gradient field to file write (777,rec=1) F close (777) call IO_write_jobRealFile(777,'F_lastInc'//trim(rankStr),size(F_lastInc)) ! writing F_lastInc field to file write (777,rec=1) F_lastInc close (777) if (worldrank == 0_pInt) then call IO_write_jobRealFile(777,'F_aimDot',size(F_aimDot)) write (777,rec=1) F_aimDot close(777) call IO_write_jobRealFile(777,'C_volAvg',size(C_volAvg)) write (777,rec=1) C_volAvg close(777) call IO_write_jobRealFile(777,'C_volAvgLastInc',size(C_volAvgLastInc)) write (777,rec=1) C_volAvgLastInc close(777) endif endif call utilities_updateIPcoords(F) if (cutBack) then F_aim = F_aim_lastInc F = reshape(F_lastInc, [9,grid(1),grid(2),grid3]) C_volAvg = C_volAvgLastInc else ForwardData = .True. C_volAvgLastInc = C_volAvg !-------------------------------------------------------------------------------------------------- ! calculate rate for aim if (F_BC%myType=='l') then ! calculate f_aimDot from given L and current F f_aimDot = F_BC%maskFloat * math_mul33x33(F_BC%values, F_aim) elseif(F_BC%myType=='fdot') then ! f_aimDot is prescribed f_aimDot = F_BC%maskFloat * F_BC%values elseif(F_BC%myType=='f') then ! aim at end of load case is prescribed f_aimDot = F_BC%maskFloat * (F_BC%values -F_aim)/loadCaseTime endif if (guess) f_aimDot = f_aimDot + P_BC%maskFloat * (F_aim - F_aim_lastInc)/timeinc_old F_aim_lastInc = F_aim !-------------------------------------------------------------------------------------------------- ! update coordinates and rate and forward last inc call utilities_updateIPcoords(F) Fdot = Utilities_calculateRate(math_rotate_backward33(f_aimDot,rotation_BC), & timeinc_old,guess,F_lastInc,reshape(F,[3,3,grid(1),grid(2),grid3])) F_lastInc = reshape(F, [3,3,grid(1),grid(2),grid3]) endif F_aim = F_aim + f_aimDot * timeinc !-------------------------------------------------------------------------------------------------- ! update local deformation gradient F = reshape(Utilities_forwardField(timeinc,F_lastInc,Fdot, & ! ensure that it matches rotated F_aim math_rotate_backward33(F_aim,rotation_BC)),[9,grid(1),grid(2),grid3]) call DMDAVecRestoreArrayF90(da,solution_vec,F,ierr); CHKERRQ(ierr) end subroutine BasicPETSc_forward !-------------------------------------------------------------------------------------------------- !> @brief destroy routine !-------------------------------------------------------------------------------------------------- subroutine BasicPETSc_destroy() use spectral_utilities, only: & Utilities_destroy implicit none PetscErrorCode :: ierr external :: & VecDestroy, & SNESDestroy, & DMDestroy call VecDestroy(solution_vec,ierr); CHKERRQ(ierr) call SNESDestroy(snes,ierr); CHKERRQ(ierr) call DMDestroy(da,ierr); CHKERRQ(ierr) end subroutine BasicPETSc_destroy end module spectral_mech_basic