Hi Dr. Bangerth,
Thanks so much for the suggestion! My code works after applying the
constraint on the Newton update!
Best,
Jimmy
On Monday, September 7, 2020 at 11:01:53 PM UTC-5, Wolfgang Bangerth wrote:
>
> On 9/7/20 6:40 PM, Jimmy Ho wrote:
> >
> > I have a general ques
Hi All,
I have a general question regarding the application of periodic boundary
conditions in Newton's method when solving nonlinear equations. Should the
periodic constraint be applied to the incremental Newton update, or
directly to the total solution vector?
Thanks in advance for any sugge
Hi Dr. Bangerth,
Thanks a lot for your guidance! I will install an external copy of UMFPACK
and see what happens!
Best,
Jimmy
On Tuesday, August 4, 2020 at 5:23:09 PM UTC-5, Wolfgang Bangerth wrote:
>
> On 8/4/20 3:56 PM, Jimmy Ho wrote:
> >
> > So, what should I do t
Hi All,
I am trying to use UMFPACK through Trilinos (V.12.18.1) Amesos solver.
Since UMFPACK is bundled with deal.ii and was configured to work in deal.ii
before, I was trying to point Trilinos to that installation of UMFPACK.
Following the README file on interfacing deal.II with Trilinos, I us
Hi Yuesu,
To be more precise: Yes, you do have two sets of basis functions in each
element. A quadratic one for interpolating the vector components, and a linear
one for interpolating the scalar. But when calculating DOFs associated with the
vector components, you should only count the basis fu
Hi Yuesu,
The 2 in the initialization means that the basis functions (hence the finite
element for the vector part) are quadratic. Which means that each element has 9
nodes. But you should still only have one basis function associated with each
node. That's why you have 9*2=18 DOFs associated w
Hi Yuesu,
When you have a vector-valued finite element, different components of the
vector are still interpolated using the same basis functions. So you can have
two DOFs on each node, but there's only one basis function associated with this
node.
Hope that helps!
Best,
Jimmy
--
The deal.I
Hi Dr. Bangerth,
Thanks a lot for the clarification! They are really helpful!
Best,
Jimmy
On Thursday, July 30, 2020 at 11:47:21 AM UTC-5, Wolfgang Bangerth wrote:
>
> On 7/30/20 10:11 AM, Jimmy Ho wrote:
> >
> > As a follow-up question, upon calling compress(), will the lo
Hi Dr. Bangerth,
As a follow-up question, upon calling compress(), will the local copy of
the system matrix on a specific processor get updated to contain
information from all other processors? In other words, if I print out the
system matrix from a particular processor after calling compress()
Hi Dr. Bangerth,
Thanks a lot for your guidance! I compared the solution in the vtu files
using the minimal example above, they are nearly identical. Looking back
into the code, I am outputting the system matrix from processor 0, which
probably only printed the part that it locally owns, hence
Hi All,
I am using the Step 40 tutorial to build a parallel program using MPI. The
code runs but generates different results when using one and multiple
processors. After stripping it down to the bare minimum, it appears that
when the mesh is built using GridGenerator::subdivided_hyper_rectangl
Hi Dr. Bangerth,
Thanks a lot for pointing me to the right direction! That's what I am
looking for!
Best,
Jimmy
On Monday, July 27, 2020 at 3:55:41 PM UTC-5, Wolfgang Bangerth wrote:
>
> On 7/27/20 2:47 PM, Jimmy Ho wrote:
> >
> > data_out.add_data_v
point variables.
Thanks again for the help!
Best,
Jimmy
On Monday, July 27, 2020 at 3:55:41 PM UTC-5, Wolfgang Bangerth wrote:
>
> On 7/27/20 2:47 PM, Jimmy Ho wrote:
> >
> > data_out.add_data_vector( cellData , "Name" , data_out.type_cell_data );
> >
> >
Hi All,
I am trying to compute the average of integration point variables and store
them as cell variables, and subsequently write them as cell arrays in the
visualization. I used:
data_out.add_data_vector( cellData , "Name" , data_out.type_cell_data );
to force deal.ii to recognize that "cell
ped-position-of-support-points-of-my-element
>
> what you are looking for?
>
> Best,
>
> Bruno
>
> On Monday, June 22, 2020 at 1:32:43 AM UTC-4, Jimmy Ho wrote:
>>
>> Dear All,
>>
>> I am trying to write a code to give initial condition for a vector of
Dear All,
I am trying to write a code to give initial condition for a vector of
FullMatrix objects. The initial value of each entry of each matrix
is uniquely defined by the corresponding nodal location. Hence, I am
looking for an easy way to iterate all nodes (including mid-side nodes) in
the
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