RFLU_ComputeIntegral1OLES.F90

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! *********************************************************************
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!******************************************************************************
!
! Purpose: Compute integral 1 of optimal LES approach.
!
! Description: None.
!
! Input: 
!   pRegion     Pointer to current region
!
! Output: None.
!
! Notes: None.
!
!******************************************************************************
!
! $Id: RFLU_ComputeIntegral1OLES.F90,v 1.8 2008/12/06 08:44:29 mtcampbe Exp $
!
! Copyright: (c) 2002 by the University of Illinois
!
!******************************************************************************

SUBROUTINE rflu_computeintegral1oles(pRegion)

  USE moddatatypes
  USE moddatastruct, ONLY : t_region
  USE modgrid, ONLY: t_grid
  USE moderror
  USE modglobal, ONLY: t_global
  USE modparameters
  USE modmpi

  USE modinterfaces, ONLY: rflu_computedcuhreinfo

  USE rflu_modoles

  IMPLICIT NONE

! --- parameters      

  TYPE(t_region), POINTER :: pregion

! --- local variables

  INTEGER :: c1g,errorflag,i,ic1l,ifc,ifcp,ifun,ifunnz,key,l, & 
             loopcounter,m,n,ncells,nfun,nfunnz,restartflag,vloc
  REAL(RFREAL) :: normfact,normfactterm
  
  TYPE(t_grid), POINTER :: pgrid
  TYPE(t_global), POINTER :: global

! ==============================================================================
! Start
! ==============================================================================

  global => pregion%global

  CALL registerfunction(global,'RFLU_ComputeIntegral1OLES',&
  'RFLU_ComputeIntegral1OLES.F90')

  IF ( global%myProcid == masterproc .AND. & 
       global%verbLevel > verbose_low ) THEN
    WRITE(stdout,'(A,3X,A)') solver_name,'Computing integral 1...'        
  END IF ! global%verbLevel

! ==============================================================================
! Set grid pointer
! ==============================================================================

  pgrid => pregion%grid

! ==============================================================================
! Set DCUHRE parameters
! ==============================================================================

  ndim   = 5
  nfun   = 9
  nfunnz = 3 ! Change this to nFun if you want all integrals evaluated
  key    = 0 ! Use accurate integration

  errabsreq = 10.0_rfreal*epsilon(1.0_rfreal)
  errrelreq = 5.0e-3_rfreal 

! ==============================================================================
! Compute DCUHRE information and allocate arrays
! ==============================================================================

  maxcalls = max_calls_limit

  CALL rflu_computedcuhreinfo(global,ndim,nfunnz,key,maxcalls,workarraysize)
  CALL rflu_allocatedcuhrearrays(global,ndim,nfunnz,nfun)

  ALLOCATE(integral(nfun),stat=errorflag)
  global%error = errorflag  
  IF ( global%error /= err_none ) THEN 
    CALL errorstop(global,err_allocate,__line__,'integral')
  END IF ! global%error

  integral(:) = 0.0_rfreal

  ALLOCATE(workarray(workarraysize),stat=errorflag)
  global%error = errorflag
  IF ( global%error /= err_none ) THEN 
    CALL errorstop(global,err_allocate,__line__,'workArray')
  END IF ! global%error

! ==============================================================================
! Set normalization factor
! ==============================================================================

  normfact = 1.0_rfreal/(15.0_rfreal*pgrid%deltaOLES**6)

! ==============================================================================
! Set non-zero functions
! ==============================================================================

  CALL rflu_setmapfunnz2funcorr32(nfunnz)

! ==============================================================================
! Loop over prototype faces
! ==============================================================================

  DO ifcp = 1,3 
    ifc = pgrid%fp2fOLES(ifcp)

! ------------------------------------------------------------------------------
!   Get face limits from normal face list
! ------------------------------------------------------------------------------

    c1g = pgrid%f2c(1,ifc)

    dummy = maxloc(abs(pgrid%fn(1:3,ifc)))    
    nzloc = dummy(1) ! Used in RFLU_DefineCorrelation32 (next two also)     
    nzval = pgrid%fc(nzloc,ifc)       
    nzsgn = nint(pgrid%fn(nzloc,ifc)) 

    n = ndim-2

    DO m = 1,3
      IF ( m /= nzloc ) THEN
        n = n + 1

        lowlim(n) = pgrid%intLimOLES(int_lim_low,m,c1g) 
        upplim(n) = pgrid%intLimOLES(int_lim_upp,m,c1g)
      END IF ! m 
    END DO ! m

! ------------------------------------------------------------------------------
!   Loop over cells
! ------------------------------------------------------------------------------        

    ncells = SIZE(pgrid%fsOLES,1)

    DO ic1l = 1,ncells
      c1g = pgrid%fsOLES(ic1l,ifc)

      lowlim(1) = pgrid%intLimOLES(int_lim_low,xcoord,c1g) 
      lowlim(2) = pgrid%intLimOLES(int_lim_low,ycoord,c1g)
      lowlim(3) = pgrid%intLimOLES(int_lim_low,zcoord,c1g)                

      upplim(1) = pgrid%intLimOLES(int_lim_upp,xcoord,c1g)
      upplim(2) = pgrid%intLimOLES(int_lim_upp,ycoord,c1g)
      upplim(3) = pgrid%intLimOLES(int_lim_upp,zcoord,c1g)        


      errorflag   = 0
      maxcalls    = max_calls_start
      restartflag = 0 

! --- Compute integrals --------------------------------------------------------

      DO loopcounter = 1,dcuhre_loop_limit 
        CALL dcuhre(ndim,nfunnz,lowlim,upplim,min_calls,maxcalls, & 
                    rflu_definecorrelation32,errabsreq,errrelreq, & 
                    key,workarraysize,restartflag,integralnz, & 
                    errabsest,neval,errorflag,workarray)

        IF ( errorflag == 0 .OR. loopcounter == dcuhre_loop_limit ) THEN
          EXIT
        ELSE IF ( errorflag == 1 ) THEN 
          restartflag = 1
          maxcalls    = max_calls_factor*maxcalls

          CALL rflu_computedcuhreinfo(global,ndim,nfunnz,key,maxcalls, & 
                                      workarraysizenew)

          IF ( workarraysizenew > workarraysize ) THEN 
            EXIT       
          END IF ! workArraySizeNew
        ELSE 
          CALL errorstop(global,err_dcuhre_output,__line__)                            
        END IF ! errorFlag
      END DO ! loopCounter                              

! --- Normalize integral -------------------------------------------------------

      DO ifunnz = 1,nfunnz 
        ifun = mapfunnz2funcorr32(ifunnz) 
        integral(ifun) = normfact*integralnz(ifunnz) 
      END DO ! iFunNZ

! --- Store integral in array --------------------------------------------------

      DO ifun = 1,nfun
        CALL rflu_mapk2ij(ifun,l,i)        
        vloc = rflu_geti1posoles(l,ic1l)     
        pgrid%int1OLES(i,ifcp,vloc) = integral(ifun)
      END DO ! iFun             
    END DO ! ic1l       
  END DO ! ifcp


#ifdef CHECK_DATASTRUCT
! --- Data structure output for checking
      WRITE(stdout,'(A)') solver_name
      WRITE(stdout,'(A,1X,A)') solver_name,'### START CHECK OUTPUT ###'
      WRITE(stdout,'(A,1X,A)') solver_name,'Optimal LES I1 integral vector'
      DO i = 1,3 ! loop over components
        WRITE(stdout,'(2(A,1X),I1)') solver_name,'Component:',i
        DO ifcp = 1,3 ! loop over prototype faces
          WRITE(stdout,'(A,3X,A,1X,I2)') solver_name,'Face:',ifcp
          DO vloc = 1,3*ncells ! loop over components
            WRITE(stdout,'(A,1X,I6,1X,E11.4)') solver_name,vloc, & 
                                               pgrid%int1OLES(i,ifcp,vloc)
          END DO ! vLoc
        END DO ! ifcp
      END DO ! i 
      WRITE(stdout,'(A,1X,A)') solver_name,'### END CHECK OUTPUT ###'   
      WRITE(stdout,'(A)') solver_name   
#endif 

! ==============================================================================
! Deallocate arrays
! ==============================================================================

  CALL rflu_deallocatedcuhrearrays(global)

  DEALLOCATE(integral,stat=errorflag)
  global%error = errorflag
  IF ( global%error /= err_none ) THEN 
    CALL errorstop(global,err_deallocate,__line__,'integral')
  END IF ! global%error

  DEALLOCATE(workarray,stat=errorflag)
  global%error = errorflag
  IF ( global%error /= err_none ) THEN 
    CALL errorstop(global,err_deallocate,__line__,'workArray')
  END IF ! global%error

! ==============================================================================
! End
! ============================================================================== 

  CALL deregisterfunction(global)     

END SUBROUTINE rflu_computeintegral1oles

!*******************************************************************************
!
! RCS Revision history:
!
! $Log: RFLU_ComputeIntegral1OLES.F90,v $
! Revision 1.8  2008/12/06 08:44:29  mtcampbe
! Updated license.
!
! Revision 1.7  2008/11/19 22:17:42  mtcampbe
! Added Illinois Open Source License/Copyright
!
! Revision 1.6  2003/05/16 02:27:44  haselbac
! Removed KIND=RFREAL from NINT statements
!
! Revision 1.5  2003/03/15 18:29:42  haselbac
! Added KIND qualifyer to NINT, added footer
!
!*******************************************************************************