Re: [deal.II] Looking for more info on FE_RaviartThomas

2017-12-14 Thread Daniel Arndt
Praveen, > Also, is it possible to get this notes that Guido has posted > > http://www.mathsim.eu/~gkanscha/notes/mixed.pdf > > > which seems to be inaccessible

Re: [deal.II] Looking for more info on FE_RaviartThomas

2017-12-13 Thread Wolfgang Bangerth
On 12/13/2017 09:28 PM, Praveen C wrote: Right, it is just a mistake in the documentation. The code uses QGauss(k+1) for both face and interior quadrature as seen here https://github.com/dealii/dealii/blob/master/source/fe/fe_raviart_thomas.cc#L142

Re: [deal.II] Looking for more info on FE_RaviartThomas

2017-12-13 Thread Wolfgang Bangerth
Praveen, I have some doubts on the construction of FE_RaviartThomas space in deal.II. I have written my question in the attached pdf. It all depends on how you define k. Recall that RT(0) (i.e., k=0) has one point on each edge, and RT(k) will have k+1. But the QGauss(k) rule will have k

Re: [deal.II] Looking for more info on FE_RaviartThomas

2017-12-12 Thread Praveen C
Dear allI have some doubts on the construction of FE_RaviartThomas space in deal.II. I have written my question in the attached pdf.Also, is it possible to get this notes that Guido has postedhttp://www.mathsim.eu/~gkanscha/notes/mixed.pdfwhich seems to be inaccessible now. I seem to have lost the

Re: [deal.II] Looking for more info on FE_RaviartThomas

2017-08-30 Thread Wolfgang Bangerth
The RT(k) functions are defined in terms of some moments. In 2-d, there are edge moments with test functions in P_k and some cell moments with test functions like Q_{k-1,k} and Q_{k,k-1}. Usually these moments are used to define the basis functions, then we just work with the basis

Re: [deal.II] Looking for more info on FE_RaviartThomas

2017-08-30 Thread Praveen C
> > > I'm not sure why you make a distinction between shape and test functions. > They are typically chosen the same, and at the very least the finite > element descriptions we have in deal.II do not make a distinction between > the two. In essence, the finite element descriptions simply provide a

Re: [deal.II] Looking for more info on FE_RaviartThomas

2017-08-29 Thread Wolfgang Bangerth
Praveen, I have used FE_RaviartThomasNodal to solve induction equation on Cartesian meshes which worked out very well. Now I would like to solve Maxwell equations on general quad meshes. For this I have to use FE_RaviartThomas, but I do not completely understand this space. I'm not sure

[deal.II] Looking for more info on FE_RaviartThomas

2017-08-29 Thread Praveen C
Dear all I have used FE_RaviartThomasNodal to solve induction equation on Cartesian meshes which worked out very well. Now I would like to solve Maxwell equations on general quad meshes. For this I have to use FE_RaviartThomas, but I do not completely understand this space. I know that the dofs