Re: [deal.II] Question about fe_value.divergence

2020-09-03 Thread Wolfgang Bangerth
On 9/3/20 4:50 PM, yuesu jin wrote:   I read the step.20 again. It solves my question. I didn't understand what the non-primitive element talks about, now I know the necessity of that. Thank you! Glad to hear! Best W. --

Re: [deal.II] Question about fe_value.divergence

2020-09-03 Thread yuesu jin
Dear Dr. Bangerth, I read the step.20 again. It solves my question. I didn't understand what the non-primitive element talks about, now I know the necessity of that. Thank you! Best regards, Yuesu On Thu, Sep 3, 2020 at 5:38 PM yuesu jin wrote: > Dear Dr. Bangerth, > Thank you very much! I

Re: [deal.II] Question about fe_value.divergence

2020-09-03 Thread yuesu jin
Dear Dr. Bangerth, Thank you very much! I was confused about the shape function in the vector case. In step.8 we use the FEValue::shape_grad(index of shape function,index of quadrature point) and get a vector as the gradient of shape function. However, in step.20 and step.22, when we take the

Re: [deal.II] Question about fe_value.divergence

2020-09-03 Thread Wolfgang Bangerth
On 9/3/20 1:28 PM, yuesu jin wrote:   I am working on vector value finite element modeling. I read the pages https://www.dealii.org/current/doxygen/deal.II/group__vector__valued.html

[deal.II] Question about fe_value.divergence

2020-09-03 Thread yuesu jin
Dear all, I am working on vector value finite element modeling. I read the pages https://www.dealii.org/current/doxygen/deal.II/group__vector__valued.html which uses the fe_values.divergence and fe_value.grad, but I cannot find these two member functions in the FEValues\FESystem\FEValueBase