ENH: processorFaPatch: use internal-edge algos for processor edges to ensure parallel consistency

Summary

The edgeInterpolation routines have been found to exhibit inconsistent parallel behavior in certain edge cases involving finite area meshes. This inconsistency arises because different algorithms are applied to internal edges and processor edges.

• makeLPN
• makeWeights
• makeDeltaCoeffs
• makeCorrectionVectors
• makeSkewCorrectionVectors

The initial tests are carried out using a small test application: Test-faMesh-edgeInterpolation.zip.

The test matrix for these edge cases is shown below:

Case index	Planar	Equidistant	Skewness/Non-orthogonality
Case 1	Yes	Yes	Zero
Case 2	Yes	No	Zero
Case 3	Yes	Yes	Non-zero
Case 4	Yes	No	Non-zero
Case 5	No (45deg)	Yes	Zero
Case 6	No (45deg)	No	Zero
Case 7	No (45deg)	No	Non-zero
Case 8	No (60deg)	No	Non-zero

The test cases are shared below:

Case 1

Case: 1-case.zip

Case 2

Case: 2-case.zip

Case 3

Case: 3-case.zip

Case 4

Case: 4-case.zip

Case 5

Case: 5-case.zip

Case 6

Case: 6-case.zip

Case 7

Case: 7-case.zip

Case 8

Case: 8-case.zip

Resolved bugs

• #3250 (closed)
• #3249 (closed)
• #3247 (closed)
• #3244 (closed)
• #3243 (closed)

Chair case

Case (2 processors): 1-z-2procs.zip

Case (3 processors - problematic): 2-z-3procs.zip

Risks

Expect output changes in corner finite-area cases.

Metadata

• linux64ClangDPInt32Opt (clang15)
• linux64GccDPInt32Opt
• linux64GccSPDPInt64Debug
• Alltest: No new error/No change in existing output
• No regression was observed in tutorial cases involving finite-area mesh (serial/parallel):

cylinder

drippingChair

filmPanel0

hotRoomWithThermalShell

inclinedPlaneFilm

liquidFilmStepWithSprinklers

pitzDailyWithSprinklers

planeTransport

sloshing2D

sphereTransport

splashPanelFilm

added bug label

requested review from @Mattijs

assigned to @andy

changed the description

marked this merge request as draft

approved this merge request

added 79 commits

• 7de6d85a...5d0058bc - 78 commits from branch develop
• 50ab9c0e - ENH: processorFaPatch: use internal-edge algos for processor edges to ensure parallel consistency

Compare with previous version

marked the checklist item linux64GccSPDPInt64Debug as completed

marked the checklist item linux64GccDPInt32Opt as completed

marked the checklist item Alltest: No new error/No change in existing output as completed

marked this merge request as ready

added 3 commits

• 50ab9c0e...528ea551 - 2 commits from branch develop
• 2d731e1a - ENH: processorFaPatch: use internal-edge algos for processor edges to ensure parallel consistency

Compare with previous version

mentioned in commit 83b9c60a

merged