deriveVolFrac Subroutine

private recursive subroutine deriveVolFrac(fun, varSys, elempos, time, tree, nElems, nDofs, res)

compute the volume of the current element as a fraction of a reference bounding hexahedral volume (stored in tree%global%effLength). The sum of all element fractions then gives the fractional fluid volume occupation inside the reference volume, i.e. the porosity

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

Calls

proc~~derivevolfrac~~CallsGraph proc~derivevolfrac deriveVolFrac proc~tem_elemsize tem_ElemSize proc~derivevolfrac->proc~tem_elemsize proc~tem_elemsizelevel tem_ElemSizeLevel proc~tem_elemsize->proc~tem_elemsizelevel proc~tem_levelof tem_LevelOf proc~tem_elemsize->proc~tem_levelof

Source Code

  recursive subroutine deriveVolFrac( 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(:)
    ! -------------------------------------------------------------------- !
    integer :: iElem
    real(kind=rk) :: dx
    real(kind=rk) :: boundVol
    ! -------------------------------------------------------------------- !

    ! calculate the volume of the shape defined by the tree (only rectangulars)
    boundVol = tree%global%effLength(1) * tree%global%effLength(2) &
      &                                 * tree%global%effLength(3)

    res = 0.0_rk
    if (boundvol > 0.0_rk) then
      do iElem = 1, nElems
        if ( .not. btest( tree%ElemPropertyBits( elemPos(iElem) ), &
          &               prp_solid ) ) then
          dx = tem_ElemSize( tree, tree%treeID( elemPos(iElem) ))
          res( (iElem-1)*nDofs+1 ) = dx*dx*dx/boundVol
        end if
      end do  ! iElem
    end if

    ! Avoid warnings about unused arguments
    if (time%sim < 0.0_rk) then
      write(logUnit(10),*) 'Negative time for variable ', &
        &                  trim(varSys%varName%val(fun%myPos))
    end if

  end subroutine deriveVolFrac