Are there other alternative methods that might be easier to implement?
Miguel
On Mon, Jul 8, 2024 at 1:43 PM Matthew Knepley wrote:
> On Mon, Jul 8, 2024 at 6:14 AM Miguel Angel Salazar de Troya <
> miguel.sala...@corintis.com> wrote:
>
>> Thanks Adam and Matt,
>>
&
diagonally dominant Jacobian. I have not
found any reference so I might be wrong.
Best,
Miguel
On Sat, Jul 6, 2024 at 3:33 PM Matthew Knepley wrote:
> On Fri, Jul 5, 2024 at 3:29 AM Miguel Angel Salazar de Troya <
> miguel.sala...@corintis.com> wrote:
>
>> Hello, I have the N
Hello,
I have the Navier-Stokes equation coupled with a convection-diffusion
equation for the temperature. It is a two-way coupling because the
viscosity depends on the temperature. One way to solve this is with some
kind of fixed point iteration scheme, where I solve each equation
separately in a
.assemblyBegin()
mat_2.assemblyEnd()
N = PETSc.Mat().createNest([[mat, mat_2]], comm=COMM_WORLD)
N.assemblyBegin()
N.assemblyEnd()
PETSc.Sys.Print(f"N sizes: {N.getSize()}")
N.convert("mpiaij").view()
```
--
* Miguel Angel Salazar de Troya *
Head of Software Engineering
EPFL Innova
Hello,
Is there any way to get the PETSc error codes in the python interface? The
test I provided below is just a simple example that I know will run out of
memory.
Miguel
On Wed, Nov 15, 2023 at 10:00 AM Miguel Angel Salazar de Troya <
miguel.sala...@corintis.com> wrote:
> Hello
Hello,
The following simple petsc4py snippet runs out of memory, but I would like
to handle it from python with the usual try-except. Is there any way to do
so? How can I get the PETSc error codes in the python interface?
Thanks
from petsc4py import PETSc
import sys, petsc4py
petsc4py.init(sys.a
Hello,
I am trying to understand if I should make the effort to make my code use
structured meshes instead of unstructured ones. My domain is cartesian so
that is the first check for structured meshes. However, the problem size I
am looking at is ~20 million degrees of freedom. My understanding is
Hello,
I am solving the Navier-Stokes equation and an advection-diffusion equation
to model the temperature. They are fully coupled because the viscosity is
temperature dependent. I plan to solve the fully-coupled problem with a
segregated approach: I first solve the Navier-Stokes equation for a f
Thanks!
On Tue, Jun 2, 2020, 20:51 Zhang, Hong via petsc-users <
petsc-users@mcs.anl.gov> wrote:
> I checked the results again and can confirm that it is a bug on our side.
> A merge request has been created to fix it:
> https://gitlab.com/petsc/petsc/-/merge_requests/2830
>
> Thanks,
> Hong (Mr.
that I can use to store some results. Is there a similar thing for
TSPreStep() How could I implement it?
Thanks
Miguel
--
*Miguel Angel Salazar de Troya*
Graduate Research Assistant
Department of Mechanical Science and Engineering
University of Illinois at Urbana-Champaign
(217) 550-2360
salaz
various smaller of the
> dt requires a tiny dt for all time steps then you are not getting an
> advantage of adaptive time-stepping, but ok.
>
> The idea of actually propagating the gradients through the time-step
> controller seems IMHO to be absurd; I won't even put it on our
? If so, how is it done?
Thanks in advance
Miguel
--
*Miguel Angel Salazar de Troya*
Graduate Research Assistant
Department of Mechanical Science and Engineering
University of Illinois at Urbana-Champaign
(217) 550-2360
salaz...@illinois.edu
Sorry I should have been more specific. I was talking about the explicit
Runge-Kutta method.
Thanks
Miguel
On Mon, Apr 13, 2015 at 9:29 AM, Jed Brown wrote:
> Miguel Angel Salazar de Troya writes:
>
> > Hi
> >
> > I realized that even though there's a bool
Hi
I realized that even though there's a boolean named FSAL (First Same As
Last) inside the TS object, it seems this property is not implemented yet.
I just wanted to double check this is like this and also ask if it will be
implemented soon.
Thanks
Miguel
--
*Miguel Angel Salazar de
could it happen?
Would the partitioning be made in some other way to avoid this load
unbalance?
Thanks
Miguel
--
*Miguel Angel Salazar de Troya*
Graduate Research Assistant
Department of Mechanical Science and Engineering
University of Illinois at Urbana-Champaign
(217) 550-2360
salaz...@illinois.edu
etsc-users@mcs.anl.gov>
>>
>> Subject: Re: [petsc-users] DMNetworkGetEdgeRange() in parallel
>>
>> I modified the DMNetwork example to include the new DM with the
>> modified section. It has the same problems. Please find attached the code
>> to this email.
>&g
I modified the DMNetwork example to include the new DM with the modified
section. It has the same problems. Please find attached the code to this
email.
Thanks
On Tue, Feb 24, 2015 at 6:49 PM, Matthew Knepley wrote:
> On Tue, Feb 24, 2015 at 6:42 PM, Miguel Angel Salazar de Tr
---
[0]PETSC ERROR: Object is in wrong state
[0]PETSC ERROR: DM must have a default PetscSection in order to create a
global PetscSection
Thanks in advance
Miguel
On Mon, Feb 23, 2015 at 3:24 PM, Matthew Knepley wrote:
> On Mon, Feb 23, 2015 at 2:15 PM, Miguel Angel Salazar de Troya
Thanks a lot, the partition should be done before setting up the section,
right?
Miguel
On Mon, Feb 23, 2015 at 2:05 PM, Matthew Knepley wrote:
> On Mon, Feb 23, 2015 at 1:40 PM, Miguel Angel Salazar de Troya <
> salazardetr...@gmail.com> wrote:
>
>> Wouldn't inclu
23, 2015 at 8:42 AM, Miguel Angel Salazar de Troya <
> salazardetr...@gmail.com> wrote:
>
>> Thanks, that will help me. Now what I would like to have is the
>> following: if I have two processors and ten edges, the partitioning results
>> in the first processor having
used for
> anything.
>
> Shri
> From: Matthew Knepley
> Date: Mon, 23 Feb 2015 07:54:34 -0600
> To: Miguel Angel Salazar de Troya
> Cc: "petsc-users@mcs.anl.gov"
> Subject: Re: [petsc-users] DMNetworkGetEdgeRange() in parallel
>
> On Sun, Feb 22, 2015
Knepley wrote:
> On Sun, Feb 22, 2015 at 11:01 AM, Miguel Angel Salazar de Troya <
> salazardetr...@gmail.com> wrote:
>
>> Hi
>>
>> I noticed that the routine DMNetworkGetEdgeRange() returns the local
>> indices for the edge range. Is there any way to
--
*Miguel Angel Salazar de Troya*
Graduate Research Assistant
Department of Mechanical Science and Engineering
University of Illinois at Urbana-Champaign
(217) 550-2360
salaz...@illinois.edu
in parallel?
Thanks
Miguel
--
*Miguel Angel Salazar de Troya*
Graduate Research Assistant
Department of Mechanical Science and Engineering
University of Illinois at Urbana-Champaign
(217) 550-2360
salaz...@illinois.edu
de. When we
> changed the adapt type we did not zero out the function pointers for the
> old basic adaptor hence they were improperly called when the object was
> finally destroyed at the end.
> >
> > Lisandro fixed this here.
> >
> >
> https://bitbucket.o
the TSAdaptDestroy_Basic, but I think it was already
destroyed when I changed the TSAdaptType to none, is this true? How can I
effectively change the TSAdaptType without having this error?
Thanks
Miguel
--
*Miguel Angel Salazar de Troya*
Graduate Research Assistant
Department of Mechanical
4, at 11:54 AM, Miguel Angel Salazar de Troya <
> salazardetr...@gmail.com> wrote:
> >
> > PetscFinalize() is inside of the class destructor (the last line of the
> destructor), so when the object goes out of scope, the class destructor is
> called and PetscFinalize() as
On Tue, Nov 18, 2014 at 11:32 AM, Barry Smith wrote:
>
> > On Nov 18, 2014, at 11:19 AM, Miguel Angel Salazar de Troya <
> salazardetr...@gmail.com> wrote:
> >
> > Hi
> >
> > I'm implementing a problem using the TS. Most of my functions are
> metho
TS routines that need them (e.g. TSSetRHSFunction() ) I can compile the
code and run it, but many memory allocations are not freed. What can be the
issue here? Do you know of an example using C++ classes to implement PETSc
methods? Thanks in advance.
Miguel
--
*Miguel Angel Salazar de Troya*
Gradua
Sorry to be pushy, but could anyone help me on this?
Thanks
Miguel
On Thu, Oct 23, 2014 at 10:46 AM, Miguel Angel Salazar de Troya <
salazardetr...@gmail.com> wrote:
> I decided to implement the continuous adjoint because it is clearer to me
> how to do it and the gradient will conv
f the next time step after
previous_timestep (therefore interpolate_timestep is between these guys)
and it's not close either. I've read that TSInterpolate() has to be
extended to support continuous adjoints.
Thanks
Miguel
On Tue, Oct 21, 2014 at 6:04 PM, Miguel Angel Salazar de Troy
Re: [petsc-users] Cloning a DMNetwork
>
> >There is no clone method implemented for DMNetwork yet. I'll work on it
> >tomorrow.
> >
> >Thanks,
> >Shri
> >
> >From: Miguel Angel Salazar de Troya
> >Date: Tue, 21 Oct 2014 18:10:42 -05
Angel Salazar de Troya*
Graduate Research Assistant
Department of Mechanical Science and Engineering
University of Illinois at Urbana-Champaign
(217) 550-2360
salaz...@illinois.edu
> is
> > that they mention these terms must be removed. I don't understand this.
> I'm
> > planning to hard-code the discrete adjoint problem (and use the TS if
> > possible).
>
> Are they suggesting that the time step sizes for a given run should be
>
adjoint problem (and use the TS if
possible).
I know this might not be the place to ask this. Maybe Hong can help me here.
Miguel
On Sun, Oct 19, 2014 at 1:41 PM, Jed Brown wrote:
> Miguel Angel Salazar de Troya writes:
>
> > Hi all
> >
> > I'm trying to find out wh
e
solution, something that is necessary in an adjoint analysis, hence my
question about the example.
Thanks
Miguel
--
*Miguel Angel Salazar de Troya*
Graduate Research Assistant
Department of Mechanical Science and Engineering
University of Illinois at Urbana-Champaign
(217) 550-2360
salaz...@illinois.edu
Hi all
I want to save a certain quantity at the very beginning of each time step,
before any TSFunction of any kind is called. Can I do this within the
TSMonitor? It would also be ok to save that quantity at the very end of the
time step.
Thanks
Miguel
--
*Miguel Angel Salazar de Troya
It was that, I totally forgot it. Thanks a lot!
On Tue, Oct 7, 2014 at 11:50 AM, Jed Brown wrote:
> Miguel Angel Salazar de Troya writes:
>
> > Hi all
> >
> > I'm solving a discretized PDE with TS. Inside my MonitorFunction(),
> hooked
> > up with TSMonito
n't be created in that folder.
Any suggestion? Thanks.
Miguel
--
*Miguel Angel Salazar de Troya*
Graduate Research Assistant
Department of Mechanical Science and Engineering
University of Illinois at Urbana-Champaign
(217) 550-2360
salaz...@illinois.edu
ankar, Shrirang G. <
abhy...@mcs.anl.gov> wrote:
>
> From: Miguel Angel Salazar de Troya
> Date: Mon, 29 Sep 2014 16:55:14 -0500
> To: Shri
> Cc: "petsc-users@mcs.anl.gov"
> Subject: Re: [petsc-users] DMPlex with spring elements
>
>
> >Hi all
>
oblem is that the edge has information to provide to these nodes.
Thanks
Miguel
On Fri, Sep 26, 2014 at 12:33 PM, Miguel Angel Salazar de Troya <
salazardetr...@gmail.com> wrote:
> I understand. Thanks a lot.
>
> Miguel
>
> On Fri, Sep 26, 2014 at 10:53 AM, Abhyankar, Shrirang
Vec that I
get from TSGetSolution there. Would this be a problem if I'm running the
simulation in parallel? Is there a better way to save the entire solution
history in memory?
Thanks
Miguel
--
*Miguel Angel Salazar de Troya*
Graduate Research Assistant
Department of Mechanical Sci
does the
> LocalToGlobal gather to form the global residual.
>
> I chose to use SNESSetFunction in the example. You can use either of them.
>
> Shri
>
> From: Matthew Knepley
> Date: Fri, 26 Sep 2014 10:28:26 -0500
> To: Miguel Angel Salazar de Troya
> Cc: Jed Brown
Ok thanks.
Miguel
On Fri, Sep 26, 2014 at 10:28 AM, Matthew Knepley wrote:
> On Fri, Sep 26, 2014 at 10:26 AM, Miguel Angel Salazar de Troya <
> salazardetr...@gmail.com> wrote:
>
>> Yeah, but doesn't it only work with the local vectors localX and localF?
>&g
Yeah, but doesn't it only work with the local vectors localX and localF?
Miguel
On Fri, Sep 26, 2014 at 10:10 AM, Matthew Knepley wrote:
> On Fri, Sep 26, 2014 at 10:06 AM, Miguel Angel Salazar de Troya <
> salazardetr...@gmail.com> wrote:
>
>> That means that if we
local vectors. I don't understand this.
Thanks
Miguel
On Fri, Sep 26, 2014 at 9:34 AM, Matthew Knepley wrote:
> On Fri, Sep 26, 2014 at 9:31 AM, Miguel Angel Salazar de Troya <
> salazardetr...@gmail.com> wrote:
>
>> Thanks. I had another question about the DM and SN
25, 2014 at 5:15 PM, Miguel Angel Salazar de Troya <
> salazardetr...@gmail.com> wrote:
>
>> > If you need a symmetric Jacobian, you can use the BC facility in
>> > PetscSection, which eliminates the
>> > variables completely. This is how the FEM
e
> > variables completely. This is how the FEM examples, like ex12, work.
>
> You can also use MatZeroRowsColumns() or do the equivalent
> transformation during assembly (my preference).
>
--
*Miguel Angel Salazar de Troya*
Graduate Research Assistant
Department of Mechanical Science and Engineering
University of Illinois at Urbana-Champaign
(217) 550-2360
salaz...@illinois.edu
Why not? Wouldn't we have a row of zeros except for the diagonal term? The
column that corresponds to that degree of from doesn't have to be zero,
right?
Thanks
Miguel
On Sep 25, 2014 12:38 PM, "Abhyankar, Shrirang G."
wrote:
>
>
> From: Miguel Angel Salazar de Tr
gt;ide == ISOLATED_BUS) {
>farr[offset] = 0.0;
>farr[offset+1] = 0.0;
> break;
> }
>
> This sets the residual at the nodes marked with REF_BUS or ISOLATED_BUS
> to 0.0. You can do something similar.
>
> Shri
>
>
>
> From: Miguel Angel Sala
t; >
> >If you have equations only at the nodes, with a part of it contributed by
> >the edges (springs), then you can use DMNetwork. If you are planning to
> >have equations for the beads in the future, or other higher layers, then
> >DMPlex has better functionality
> >
the edges (springs), then you can use DMNetwork. If you are planning to
> have equations for the beads in the future, or other higher layers, then
> DMPlex has better functionality to manage that.
>
> Shri
>
> From: Miguel Angel Salazar de Troya
> Date: Wed, 24 Sep 2014
anual and an example is in
> src/snes/examples/tutorials/network/pflow.
>
> Shri
>
> From: Matthew Knepley
> Date: Tue, 23 Sep 2014 22:40:52 -0400
> To: Miguel Angel Salazar de Troya
> Cc: "petsc-users@mcs.anl.gov"
> Subject: Re: [petsc-users] DMPlex with spr
E
and my equations are algebraic. What is the best way in petsc to solve this
problem? Is there any example that I can follow? Thanks in advance
Miguel
--
*Miguel Angel Salazar de Troya*
Graduate Research Assistant
Department of Mechanical Science and Engineering
University of Illinois at U
the
vector X we passed to the SNES? Thanks in advance.
Miguel
--
*Miguel Angel Salazar de Troya*
Graduate Research Assistant
Department of Mechanical Science and Engineering
University of Illinois at Urbana-Champaign
(217) 550-2360
salaz...@illinois.edu
manages almost all
>> of what you need for finite element analysis.
>>
>>Barry
>>
>> On May 1, 2014, at 7:19 PM, Matthew Knepley wrote:
>>
>> > On Thu, May 1, 2014 at 6:14 PM, Miguel Angel Salazar de Troya <
>> salazardetr...@gmail.com> w
petsc capabilities,
but I would not mind start with some restrictions. I hope my question is
not too broad.
Take care
Miguel
--
*Miguel Angel Salazar de Troya*
Graduate Research Assistant
Department of Mechanical Science and Engineering
University of Illinois at Urbana-Champaign
(217) 550-2360
Thank you.
On Mon, Apr 21, 2014 at 10:24 AM, Matthew Knepley wrote:
> On Mon, Apr 21, 2014 at 10:23 AM, Miguel Angel Salazar de Troya <
> salazardetr...@gmail.com> wrote:
>
>> Thank you. Now it makes sense. Just to confirm though, back to the weak
>> form I wr
you talk about the
components and the derivatives of the components.
On Mon, Apr 21, 2014 at 9:48 AM, Matthew Knepley wrote:
> On Sun, Apr 20, 2014 at 4:17 PM, Miguel Angel Salazar de Troya <
> salazardetr...@gmail.com> wrote:
>
>> I understand. So if we had a linear elast
t itself (or the
derivative of a gradient with respect to itself). This is assuming the
indices of g3 correspond to what I said.
Thanks in advance.
Miguel
On Apr 19, 2014 6:19 PM, "Matthew Knepley" wrote:
> On Sat, Apr 19, 2014 at 5:25 PM, Miguel Angel Salazar de Troya <
> sa
fields? I think this is what is confusing me.
On Sat, Apr 19, 2014 at 11:35 AM, Matthew Knepley wrote:
> On Fri, Apr 18, 2014 at 1:23 PM, Miguel Angel Salazar de Troya <
> salazardetr...@gmail.com> wrote:
>
>> Hello everybody.
>>
>> First, I am taking this example
you vectorize the fourth order tensor?
Thanks in advance
Miguel
--
*Miguel Angel Salazar de Troya*
Graduate Research Assistant
Department of Mechanical Science and Engineering
University of Illinois at Urbana-Champaign
(217) 550-2360
salaz...@illinois.edu
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