Re: [deal.II] Re: shape_value, shape_grad in arbitrary points within quad that are not quadrature points

2018-08-17 Thread Juan Carlos Araujo Cabarcas
Thanks a lot for the pointers! El viernes, 17 de agosto de 2018, 22:57:24 (UTC+2), Wolfgang Bangerth escribió: > > On 08/17/2018 02:56 PM, Juan Carlos Araujo Cabarcas wrote: > > Hej, thanks for your prompt answer! > > Yes, your interpretation of my poor description is correct. So then I > jus

Re: [deal.II] Re: shape_value, shape_grad in arbitrary points within quad that are not quadrature points

2018-08-17 Thread Wolfgang Bangerth
On 08/17/2018 02:56 PM, Juan Carlos Araujo Cabarcas wrote: Hej, thanks for your prompt answer! Yes, your interpretation of my poor description is correct. So then I just need to create a new FEValues within the cell loop containing the points where I want to evaluate the shape functions, right?

[deal.II] Re: shape_value, shape_grad in arbitrary points within quad that are not quadrature points

2018-08-17 Thread Juan Carlos Araujo Cabarcas
Hej, thanks for your prompt answer! Yes, your interpretation of my poor description is correct. So then I just need to create a new FEValues within the cell loop containing the points where I want to evaluate the shape functions, right? How do I add this points? Also if the points are in the

[deal.II] Re: shape_value, shape_grad in arbitrary points within quad that are not quadrature points

2018-08-17 Thread Daniel Arndt
Juan, I would like to ask what would be the best/fastest way to evaluate *fe_v.shape_value > (i,x), **fe_v.shape_grad* *(i,x)*, in points that are not quadrature > points but that are guaranteed to lie within the curved cell/quad. > If I understand the situation correctly, you have a FEValues o

[deal.II] Step 46: pressure uniquely defined

2018-08-17 Thread georgios . sialounas
Dear all, In step 46 (and step 22 too if possible) for stokes, how to we ensure that the pressure is uniquely defined (i.e. that it is in L^2_0)? Kind regards, Georgios -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/