From: Jed Brown
Date: Sunday, March 3, 2024 at 9:24 PM
To: Zou, Ling , petsc-users@mcs.anl.gov
Subject: Re: [petsc-users] FW: 'Preconditioning' with lower-order method
One option is to form the preconditioner using the FV1 method, which is sparser
and satisfies h-ellipticity, while using FV2
One option is to form the preconditioner using the FV1 method, which is sparser and satisfies h-ellipticity, while using FV2 for the residual and (optionally) for matrix-free operator application. FV1 is a highly diffusive method so in a sense,
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Thank you, Mark. This is encouraging!
I will give it a try and report back.
-Ling
From: Mark Adams
Date: Sunday, March 3, 2024 at 11:10 AM
To: Zou, Ling
Cc: petsc-users@mcs.anl.gov
Subject: Re: [petsc-users] FW: 'Preconditioning' with lower-order method
On Sun, Mar 3, 2024 at 11: 42 AM Zou
On Sun, Mar 3, 2024 at 11:42 AM Zou, Ling via petsc-users <
petsc-users@mcs.anl.gov> wrote:
> Original email may have been sent to the incorrect place.
>
> See below.
>
>
>
> -Ling
>
>
>
> *From: *Zou, Ling
> *Date: *Sunday, March 3, 2024 at 10:34 AM
> *To: *petsc-users
> *Subject:
Original email may have been sent to the incorrect place.
See below.
-Ling
From: Zou, Ling
Date: Sunday, March 3, 2024 at 10:34 AM
To: petsc-users
Subject: 'Preconditioning' with lower-order method
Hi all,
I am solving a PDE system over a spatial domain. Numerical methods are:
* Finite
