fluids: Set solution time label for strong stg

fluids: Switch to StateVar enum

fluids: Rename primitive booleans, misc formatting

fluids: Make stg components dependent on primitive

Fluids - Newtonian with Primitive variables (#1011)

* Fluids - Initial commit for Newtonian primitive variables

* Fluids - include A0 (dU/dY) in the output

* Fluids - added ICs for IG in primi

Fluids - Newtonian with Primitive variables (#1011)

* Fluids - Initial commit for Newtonian primitive variables

* Fluids - include A0 (dU/dY) in the output

* Fluids - added ICs for IG in primitive variables

* Fluids - added Jacobean QFunction for primitive variables

* Fluids - added RHS QFunction for primitive variables

* Fluids - fixed compilation errors and warnings

* Fluids - added ICs for density_current with primitive variables

* Fluids - In/OutFlow BCs for channel in primitive variables

* Adding the missing parts after rebasing onto main

* Fluids - Use correct component names for primitive variables

* Fluids - Primitive variables supported only with implicit scheme

* Fluids - drop in/outflow for channel flow and call Exact_Channel_Prim() in Exact_Channel()

* Fluids - Set solver's QFunction data in an if-else statement

* Fluids - style

* Fluids - add a comment to explain why the the gravity body force is excluded from the potential energy.

* Fluids - Exact_Channel return State

* Fluids - density_current: some style and cleanup

* Fluids - DC: refactor & cleanup

* Fluids - Singel QFunction for prim&cons

* Fluids - Use absolute temperature

* Fluids - DC: Fix pressure

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fluids: Force final output except if output_freq=0

fluids: Skip I/O if output_freq == 0 (#1027)

Merge pull request #1018 from CEED/jrwrigh/stg_precompute_ektot

examples/fluids: skip legacy preallocation (we use COO)

When using -snes_fd_color or running a model that doesn't provide a
Jacobian (in which case coloring will be used automatically), we still
nee

examples/fluids: skip legacy preallocation (we use COO)

When using -snes_fd_color or running a model that doesn't provide a
Jacobian (in which case coloring will be used automatically), we still
need to preallocate.

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examples/fluids: explicitly handle MFFD

examples/fluids: use shell for Amat, block diagonal aij* for Pmat

This adds two independent options for tuning solves.

-amat_type shell: causes Amat and Pmat to be different matrices, with shell
us

examples/fluids: use shell for Amat, block diagonal aij* for Pmat

This adds two independent options for tuning solves.

-amat_type shell: causes Amat and Pmat to be different matrices, with shell
used for Amat. It's technically possible to use other matrix formats
here.

-pmat_pbdiagonal: causes Pmat to be assembled as point-block diagonal.
Note that this usually only makes sense in addition to -amat_type shell
because otherwise your KSP is only working with the point-block diagonal.

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fluids: Implement stgdata for ektot

examples/fluids: use DMGetCellCoordinateDM to handle periodicity

Note that without -dm_sparse_localize 0 (default=1), the cell DM will
only have cells with localized coordinates (and there is no vec

examples/fluids: use DMGetCellCoordinateDM to handle periodicity

Note that without -dm_sparse_localize 0 (default=1), the cell DM will
only have cells with localized coordinates (and there is no vector
representation that contains both).

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Merge pull request #1009 from CEED/jrwrigh/dirichlet_with_libceed

Fluids - Use libCEED to compute Dirichlet boundary conditions

fix(fluids): Create and use basis_xc_sur for dirichlet bcs

fluids: Use ApplyAdd for dirichlet_libCEED BCs

fluids: Implement dirichlet bcs via libCEED

fluids: Fix post-processing in DMPlexInsertBoundaryValues_NS

examples/fluids: Viscous flux for BoundaryIntegral jacobian

examples/fluids: Add viscous flux to POutflow Jacobian

examples/fluids: Move StrongSTGbcFunc to newtonian.h

- Requires significant changes to how the stg_context is passed to the
the strong bc

examples/fluids: Cleanup code

- Code either commented out, or left over from previous debugging

examples/fluids: Pass solution gradient to boundary QFs

fluids - add preloading (#997)

* fluids - add preloading

* fluids - fix accidentally dropped line

Co-authored-by: James Wright <james@jameswright.xyz>

* fluids - get wallclock from stage lo

fluids - add preloading (#997)

* fluids - add preloading

* fluids - fix accidentally dropped line

Co-authored-by: James Wright <james@jameswright.xyz>

* fluids - get wallclock from stage log, FRAGILE

Co-authored-by: James Wright <james@jameswright.xyz>

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fluids - only VecZero in the BCs if using SetBCsFromICs