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MFEM Non-linear support #31776

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@karthichockalingam
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The PR closes #31772

Thanks,
@alexanderianblair
@SohailSTFC
@nmnobre
Karthik.

@karthichockalingam karthichockalingam force-pushed the ab_sr_kc/nl-eq-system-diffusion branch from f85429d to 827832a Compare October 23, 2025 19:10
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Caution! This contains a submodule update

@karthichockalingam karthichockalingam force-pushed the ab_sr_kc/nl-eq-system-diffusion branch from 827832a to 02e75a0 Compare October 23, 2025 19:43
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Caution! This contains a submodule update

@karthichockalingam karthichockalingam force-pushed the ab_sr_kc/nl-eq-system-diffusion branch from 02e75a0 to 1a1e2e6 Compare October 23, 2025 20:15
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Caution! This contains a submodule update

@karthichockalingam karthichockalingam force-pushed the ab_sr_kc/nl-eq-system-diffusion branch from 1a1e2e6 to 4a57b73 Compare October 23, 2025 21:00
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Caution! This contains a submodule update

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moosebuild commented Oct 23, 2025 •
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Job Documentation, step Docs: sync website on 62752f9 wanted to post the following:

View the site here

This comment will be updated on new commits.

@karthichockalingam @nmnobre
Declare block vectors and arrays in header
27d814c
@karthichockalingam @nmnobre
Pass grid function and block offset to BuildEquationSystem
96c4e74
@karthichockalingam @nmnobre
apply essential bcs at dofs
4ffa664
@karthichockalingam @nmnobre
copy vector to blockvector
ef58038
@karthichockalingam @nmnobre
apply essential bc in mult
b853c2d
@karthichockalingam @nmnobre
Replace copy vec with dynamic cast to block vector
b6e2d9e
@karthichockalingam @nmnobre
Raplace applyDirchValues with ApplyEssVals
8fc6637
@karthichockalingam @nmnobre
Update jacobian in Mult
203b514
@karthichockalingam @nmnobre
Update time derivative essential constraints
2d9402e
@karthichockalingam @nmnobre
Call update time derivative essential bc in TimeDomainEquationSystemP…
3c9302f 
…roblemOperator
@karthichockalingam @nmnobre
Add Newton Mult to TimeDependentEquationSystem
78e1878
@karthichockalingam @nmnobre
replace bc_x with _dvardt_ess_constraints
634ba67
@karthichockalingam @nmnobre
Move ApplyEssentialBCs from BuildLinearFroms to EquationSystemProblem…
2c822c4 
…Operator::Solve()
@karthichockalingam @nmnobre
Using _var_ess_constraints for transient problems
1b03da4
@karthichockalingam @nmnobre
Made UpdateEssDerivativeVals member function of TimeDependentEquation…
05f730a 
…System
@karthichockalingam @nmnobre
Having one mult for EquationSystem and TimeDependentEquationSystem
ff10dec
@karthichockalingam @nmnobre
loop over _trial_var_names to populate _test_pfespaces
20bb916
@karthichockalingam @nmnobre
Add DomainLFGradKernel
f458dc6
@karthichockalingam @nmnobre
Add MFEMGradientGridFunction
3212858
@karthichockalingam @nmnobre
Use zero_vec instead of _true_rhs in problem operator
3249082
karthichockalingam and others added 18 commits October 27, 2025 12:32
@karthichockalingam @nmnobre
Add the jacobian contribution to MFEMDomainLFGradKernel for a problem…
1519e85 
… constant coeff of one
@karthichockalingam @nmnobre
(1) Added aux vector for b contribution (2) Dropped bilinear contribu…
dd93bcd 
…tion from MFEMDomainLFGradKernel (3) Changed input file to have only source term with homogenouse bcs for a linear problem
@karthichockalingam @nmnobre
Add MixedScalarWeakDivergenceKernel
229bb0c
@karthichockalingam @nmnobre
Add input file for non-linear problem but not working
dd242f2
@karthichockalingam @nmnobre
Fix the sign on b
4de2d80
@karthichockalingam @nmnobre
Bug fix: Changed to use sol instead of _trueBlockSol in _jacobian->Ad…
7862ba7 
…dMult
@karthichockalingam @nmnobre
Dropped ApplyEssVals
22e3efa
@karthichockalingam @nmnobre
Take initial condition as initial guess
2f7e9ce
@karthichockalingam @nmnobre
Add newton paramaters from executioner block
94c90ab
@karthichockalingam @nmnobre
Change to the inputfile and square.e from mesh
29d55ea
@karthichockalingam @nmnobre
remove nldiffusion.i
bfbe700
@karthichockalingam @nmnobre
Rename file from true_nldiffusion.i to nldiffusion.i
ac37cf1
@karthichockalingam @nmnobre
change output folder name
053d4a5
@karthichockalingam @nmnobre
Add test for non-linear diffusion
0907f71
@karthichockalingam @nmnobre
Fixed typo in MFEMDomainLFGradKernel
79f780d
@karthichockalingam @nmnobre
Add documentation to kernels and functions
e4c22e0
@karthichockalingam @nmnobre
Clang formatted idaholab#31772
63a4a27
@nmnobre
Patch mfem::HypreGMRES/PCG to reset preconditioning matrix
d882727
@nmnobre nmnobre force-pushed the ab_sr_kc/nl-eq-system-diffusion branch from 4a57b73 to d882727 Compare October 27, 2025 13:03
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Caution! This contains a submodule update

moosebuild
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Caution! This contains a submodule update

@karthichockalingam karthichockalingam force-pushed the ab_sr_kc/nl-eq-system-diffusion branch from 1280a9a to 37726d5 Compare October 28, 2025 11:05
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Caution! This contains a submodule update

@karthichockalingam karthichockalingam force-pushed the ab_sr_kc/nl-eq-system-diffusion branch from 37726d5 to a0e4ae3 Compare October 28, 2025 11:47
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Job Precheck, step Clang format on 6588ac0 wanted to post the following:

Your code requires style changes.

A patch was auto generated and copied here
You can directly apply the patch by running, in the top level of your repository:

curl -s https://mooseframework.inl.gov/docs/PRs/31776/clang_format/style.patch | git apply -v

Alternatively, with your repository up to date and in the top level of your repository:

git clang-format 2acb415a170285fef37748f90025af38c3977b3c

@karthichockalingam karthichockalingam force-pushed the ab_sr_kc/nl-eq-system-diffusion branch from 6588ac0 to 62752f9 Compare October 28, 2025 19:30
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Job Test, step Results summary on 62752f9 wanted to post the following:

Framework test summary

Compared against 2acb415 in job civet.inl.gov/job/3334968.

Removed tests

Added tests

Test Time (s)
mfem/kernels.MFEMNonLinearDiffusion 8.24

Run time changes

Test Base (s) Head (s) +/-
mfem/kernels.MFEMCurlCurlLOR 10.22 17.00 +66.31%
mfem/kernels.MFEMGradDivLOR 6.41 9.88 +54.16%
mfem/kernels.MFEMDiffusionLOR 2.13 3.21 +50.79%

Modules test summary

Compared against 2acb415 in job civet.inl.gov/job/3334968.

Removed tests

Added tests

Run time changes

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MFEM Non-linear Solve

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