fluids/newtonian: automate Ctau_v

fluids-newtonian: Stabilization coefficients dependent on polynomial degree

examples/fluids: remove C99 designated initializers for use with CUDA

nvrtc does not support this construct.

minor - assorted formatting fixes

Merge pull request #1095 from CEED/jed/remove-stale-indent-comments

remove stale indent comments

fluids: Improve freestream setup guards

- Run setup function when freestream bcs are requested
- Don't require -freestream_velocity to be set

fluids: Add SimpleBC to problem setup function

fluids: Move FreestreamBCSetup to newtonian.c

style: remove obsolete (with clang-format) INDENT comments

examples/fluids: fix newtonianwave for conservative variables

Update time step closer to advective CFL

examples/fluids: fix variable and Riemann switch/case/break

fluids: Fix freestream error typo

examples/fluids: freestream options and documentation

* Collect options under -freestream_ prefix and use HLLC by default.
* newtonianwave.yaml: equal aspect, monitoring options

Switch to clang-format (#1051)

* style - switch to clang-format

* ci - use newer libxsmm

* action - update format action

* format - consistent use of {} for multi-line if/for

* make - re

Switch to clang-format (#1051)

* style - switch to clang-format

* ci - use newer libxsmm

* action - update format action

* format - consistent use of {} for multi-line if/for

* make - remove stray newline

* make - simpler 'make format' target

* ci - use newer libxsmm

* doc - minor release note claification

* minor - minor fix

* minor - minor fix

* minor - minor fix

* minor - minor fix

* make format

* format - less aggressive alignment rules

* tidy - check for argument name mismatches

* fix newline

* format - mirror Ratel update to .clang-format

* fix merge error

* fix merge conflict

* fix merge error

* drop style in .phony list

* Update .clang-format

Co-authored-by: Jed Brown <jed@jedbrown.org>

* apply updated format

Co-authored-by: Jed Brown <jed@jedbrown.org>

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Merge pull request #1080 from CEED/ade/riemann-bcs

HLL Flux for Riemann BCs

fluids: Move freestream bc setup to function

- This will allow it to be called from other problems more easily (ie.
for the Blasius problem)

fluids: Add HLL Jacobian for freestream bc

fluids: Add newtonian_wave problem

- Mainly used to verify the HLL boundary condition.

fluids: Prevent Chebyshev calc if using STG

fluids: Style, refactor to PetscCall, etc.

fluids: Add STG fluctuations to initial condition

- Extrudes the STG fluctuations downstream of the inflow (using the STG
method's inherent dependence on streamwise distance)

fluids: Refactor STG wall distance variable

- Needless shortening.
- Confused me when debugging even though I wrote the code myself...

Fluids - Blasius: Some Minor Modifications (#1063)

* Fluids - blasius: default T_wall = T_inf = 288

* Fluids - blasius: break when Chebyshev solve diverges

* Fluids - blasius: add prefix for C

Fluids - Blasius: Some Minor Modifications (#1063)

* Fluids - blasius: default T_wall = T_inf = 288

* Fluids - blasius: break when Chebyshev solve diverges

* Fluids - blasius: add prefix for Chebyshev snes solve

* Fluids - blasius: N_Chebyshev -> n_chebyshev

* Update examples/fluids/tests-output/blasius_test.yaml

Co-authored-by: Jed Brown <jed@jedbrown.org>

* Fluids - blasius: Modify the parameters in the regression test

* examples/fluids: Blasius solution is variable density

We use the ideal gas relation that density ~ 1/enthalpy when held at
constant pressure.

* examples/fluids: Blasius slower growth factor

* examples/fluids: fix Chebyshev on GPU

and close memory leak

Co-authored-by: Jed Brown <jed@jedbrown.org>

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Fluids - Some fixes missing from #1039 (#1056)

* Fluids - Blasius: drop theta0, style, and update README

* Fluids - Add regression test for laminar blasius

Fluids - Compressible Blasius boundary layer (#1039)

* Fluids - Compressible Blasius boundary layer solution

* Fluids - Blasius: default delta0 = 4.2e-3

* Fluids - Use the new helper functions

Fluids - Compressible Blasius boundary layer (#1039)

* Fluids - Compressible Blasius boundary layer solution

* Fluids - Blasius: default delta0 = 4.2e-3

* Fluids - Use the new helper functions in blasius

* Update examples/fluids/qfunctions/blasius_exact.h

Co-authored-by: Jed Brown <jed@jedbrown.org>

* Update examples/fluids/qfunctions/blasius_exact.h

Co-authored-by: Jed Brown <jed@jedbrown.org>

* Fluids - remove blasius_exact.h

* Fluids - N_Chebyshev: 10 -> 20

Co-authored-by: Jed Brown <jed@jedbrown.org>

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