tem_division_forElement Subroutine

public recursive subroutine tem_division_forElement(fun, varSys, elempos, time, tree, nElems, nDofs, res)

Routine to divide variables if all variables have same number of components.

\verbatim -- in lua file, one can define as following: variable = {{ name = 'coeff', ncomponents = 3, vartype = "st_fun", st_fun = 0.25 }, { name = 'newVel', ncomponents = 1, vartype = "operation", operation = {kind='division', input_varname={velocity, coeff}} -- numerator, denominator } ... } \endverbatim

The interface has to comply to the abstract interface tem_varSys_module#tem_varSys_proc_element.

Arguments

Type IntentOptional Attributes Name
class(tem_varSys_op_type), intent(in) :: fun

Description of the method to obtain the variables, here some preset values might be stored, like the space time function to use or the required variables.
type(tem_varSys_type), intent(in) :: varSys

The variable system to obtain the variable from.
integer, intent(in) :: elempos(:)

Position of the TreeID of the element to get the variable for in the global treeID list.
type(tem_time_type), intent(in) :: time

Point in time at which to evaluate the variable.
type(treelmesh_type), intent(in) :: tree

global treelm mesh info
integer, intent(in) :: nElems

Number of values to obtain for this variable (vectorized access).
integer, intent(in) :: nDofs

Number of degrees of freedom within an element.
real(kind=rk), intent(out) :: res(:)

Resulting values for the requested variable.

Linearized array dimension: (n requested entries) x (nComponents of this variable) x (nDegrees of freedom) Access: (iElem-1)fun%nComponentsnDofs + (iDof-1)*fun%nComponents + iComp

Source Code

  recursive subroutine tem_division_forElement( fun, varsys, elempos, time,   &
    &                                           tree, nElems, nDofs, res      )
    ! -------------------------------------------------------------------- !
    !> Description of the method to obtain the variables, here some preset
    !! values might be stored, like the space time function to use or the
    !! required variables.
    class(tem_varSys_op_type), intent(in) :: fun

    !> The variable system to obtain the variable from.
    type(tem_varSys_type), intent(in) :: varSys

    !> Position of the TreeID of the element to get the variable for in the
    !! global treeID list.
    integer, intent(in) :: elempos(:)

    !> Point in time at which to evaluate the variable.
    type(tem_time_type), intent(in)  :: time

    !> global treelm mesh info
    type(treelmesh_type), intent(in) :: tree

    !> Number of values to obtain for this variable (vectorized access).
    integer, intent(in) :: nElems

    !> Number of degrees of freedom within an element.
    integer, intent(in) :: nDofs

    !> Resulting values for the requested variable.
    !!
    !! Linearized array dimension:
    !! (n requested entries) x (nComponents of this variable)
    !! x (nDegrees of freedom)
    !! Access: (iElem-1)*fun%nComponents*nDofs +
    !!         (iDof-1)*fun%nComponents + iComp
    real(kind=rk), intent(out) :: res(:)
    ! -------------------------------------------------------------------- !
    real(kind=rk) :: divisor(nElems*nDofs*fun%nComponents)
    real(kind=rk) :: dividend(nElems*nDofs*fun%nComponents)
    integer :: iComp, iDof, idx, iElem
    ! -------------------------------------------------------------------- !

    call varSys%method%val(fun%input_varPos(1))%get_element( &
      & varSys  = varSys,                                    &
      & elemPos = elemPos,                                   &
      & time    = time,                                      &
      & tree    = tree,                                      &
      & nElems  = nElems,                                    &
      & nDofs   = nDofs,                                     &
      & res     = dividend                                   )

    call varSys%method%val(fun%input_varPos(2))%get_element( &
      & varSys  = varSys,                                    &
      & elemPos = elemPos,                                   &
      & time    = time,                                      &
      & tree    = tree,                                      &
      & nElems  = nElems,                                    &
      & nDofs   = nDofs,                                     &
      & res     = divisor                                    )

    do iElem = 1, nElems
      do iDof = 1, nDofs
        do iComp = 1, fun%nComponents
          idx = (( ielem-1)* fun%ncomponents* ndofs+( idof-1)* fun%ncomponents+icomp)
          res(idx) = dividend(idx) / divisor(idx)
        end do
      end do
    end do

  end subroutine tem_division_forElement