Hello!
Happy New Year.
I am trying to implement
- *adaptive mesh refinement (with hanging nodes) *for an elasticity
equation
- with *DG* methods
- by utilizing* Simplex. *
I am willing to modify library files if necessary.
Please if there is anybody who has looked through above components, please
share your thoughts! :)
For DG methods, I am using the classical face loop, so we have three
different cases.
When the face has children (neighbor is finer)- we need to use
"FESubfaceValues"..
---
MappingFE<dim> mapping; mapping(FE_SimplexP<dim>(1)
FESystem<dim> fe; fe(FE_SimplexDGP<dim>(1), dim)
QGaussSimplex<dim> face_quadrature_formula(fe.degree+1);
FESubfaceValues<dim> fe_subface_values (mapping,fe,
face_quadrature_formula,
update_values | update_normal_vectors |
update_gradients |
update_quadrature_points | update_JxW_values);
---
then, we initialize with cell, face and subface numbers -
*fe_subface_values.reinit(cell,face_no,subface_no);*
However, with the simplex, I have the following error with the above line !
An error occurred in line <1597> of file </dealii/source/base/
*qprojector.cc*> in function
static QProjector<2>::DataSetDescriptor
dealii::QProjector<2>::DataSetDescriptor::subface(const
dealii::ReferenceCell &, const unsigned int, const unsigned int, const
unsigned char, const unsigned int, const internal::SubfaceCase<2>) [dim = 2]
The violated condition was:
reference_cell == ReferenceCells::Quadrilateral
*My question is *
*i) does anybody have any experience with this case? when you need subface
values for DG + Simplex? *
*ii) Should I use meshworker or something more recent? *
*iii) I looked into **qprojector.cc, and *
QProjector<2>::DataSetDescriptor::subface.
This function only returns
return ((face_no * GeometryInfo<2>::max_children_per_face + subface_no) *
n_quadrature_points);
If I manually fix this part to fit simplex, and reinstall deal.ii, do you
think it will fix the problem?
Thanks a lot!
Sanghyun
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