Real
Q2PBorehole::computeQpResidual()
{
const Real character = _character.value(_t, _q_point[_qp]);
if (character == 0.0)
return 0.0;
const Real bh_pressure =
_p_bot +
_unit_weight *
(_q_point[_qp] -
_bottom_point); // really want to use _q_point instaed of _current_point, i think?!
// Get the ID we initially assigned to this point
const unsigned current_dirac_ptid = currentPointCachedID();
// If getting the ID failed, fall back to the old bodge!
// if (current_dirac_ptid == libMesh::invalid_uint)
// current_dirac_ptid = (_zs.size() > 2) ? 1 : 0;
Real outflow(0.0); // this is the flow rate from porespace out of the system
Real wc(0.0);
if (current_dirac_ptid > 0)
// contribution from half-segment "behind" this point (must have >1 point for
// current_dirac_ptid>0)
{
wc = wellConstant(_permeability[0],
_rot_matrix[current_dirac_ptid - 1],
_half_seg_len[current_dirac_ptid - 1],
_current_elem,
_rs[current_dirac_ptid]);
if ((character < 0.0 && _pp[_i] < bh_pressure) || (character > 0.0 && _pp[_i] > bh_pressure))
// injection, so outflow<0 || // production, so outflow>0
outflow +=
_test[_i][_qp] * std::abs(character) * wc * _mobility[_i] * (_pp[_i] - bh_pressure);
}
if (current_dirac_ptid + 1 < _zs.size() || _zs.size() == 1)
// contribution from half-segment "ahead of" this point, or we only have one point
{
wc = wellConstant(_permeability[0],
_rot_matrix[current_dirac_ptid],
_half_seg_len[current_dirac_ptid],
_current_elem,
_rs[current_dirac_ptid]);
if ((character < 0.0 && _pp[_i] < bh_pressure) || (character > 0.0 && _pp[_i] > bh_pressure))
// injection, so outflow<0 || // production, so outflow>0
outflow +=
_test[_i][_qp] * std::abs(character) * wc * _mobility[_i] * (_pp[_i] - bh_pressure);
}
_total_outflow_mass.add(
outflow * _dt); // this is not thread safe, but DiracKernel's aren't currently threaded
return outflow;
}
Real
CachingPointSource::computeQpResidual()
{
// Grab the user-defined ID for the Dirac point we are currently on.
unsigned id = currentPointCachedID();
// If looking up the ID failed, we can't continue.
if (id == libMesh::invalid_uint)
mooseError("User id for point " << _current_point << " is " << id);
// This is negative because it's a forcing function that has been
// brought over to the left side. The value of the forcing is equal
// to the ID of the point in this simple example.
return -_test[_i][_qp] * static_cast<Real>(id);
}
Real
Q2PBorehole::jac(unsigned int jvar)
{
if (_i != _j)
return 0.0;
const Real character = _character.value(_t, _q_point[_qp]);
if (character == 0.0)
return 0.0;
const Real bh_pressure =
_p_bot +
_unit_weight *
(_q_point[_qp] -
_bottom_point); // really want to use _q_point instaed of _current_point, i think?!
const Real phi = 1;
// Get the ID we initially assigned to this point
const unsigned current_dirac_ptid = currentPointCachedID();
// If getting the ID failed, fall back to the old bodge!
// if (current_dirac_ptid == libMesh::invalid_uint)
// current_dirac_ptid = (_zs.size() > 2) ? 1 : 0;
Real outflowp(0.0);
const bool deriv_wrt_pp =
(_var_is_pp && (jvar == _var.number())) || (!_var_is_pp && (jvar == _other_var_num));
Real wc(0.0);
if (current_dirac_ptid > 0)
// contribution from half-segment "behind" this point
{
wc = wellConstant(_permeability[0],
_rot_matrix[current_dirac_ptid - 1],
_half_seg_len[current_dirac_ptid - 1],
_current_elem,
_rs[current_dirac_ptid]);
if ((character < 0.0 && _pp[_i] < bh_pressure) || (character > 0.0 && _pp[_i] > bh_pressure))
{
// injection, so outflow<0 || // production, so outflow>0
if (deriv_wrt_pp)
outflowp += std::abs(character) * wc *
(_mobility[_i] * phi + _dmobility_dp[_i] * phi * (_pp[_i] - bh_pressure));
else
outflowp += std::abs(character) * wc * _dmobility_ds[_i] * phi * (_pp[_i] - bh_pressure);
}
}
if (current_dirac_ptid < _zs.size() - 1 || _zs.size() == 1)
// contribution from half-segment "ahead of" this point
{
wc = wellConstant(_permeability[0],
_rot_matrix[current_dirac_ptid],
_half_seg_len[current_dirac_ptid],
_current_elem,
_rs[current_dirac_ptid]);
if ((character < 0.0 && _pp[_i] < bh_pressure) || (character > 0.0 && _pp[_i] > bh_pressure))
{
// injection, so outflow<0 || // production, so outflow>0
if (deriv_wrt_pp)
outflowp += std::abs(character) * wc *
(_mobility[_i] * phi + _dmobility_dp[_i] * phi * (_pp[_i] - bh_pressure));
else
outflowp += std::abs(character) * wc * _dmobility_ds[_i] * phi * (_pp[_i] - bh_pressure);
}
}
return _test[_i][_qp] * outflowp;
}
