Summary
Aim
To implement a recirculation boundary condition for an arbitrary operand scalar with:
- Multiple connected outlets and inlets
- Optional filtration fraction for each recirculation loop
- Optional time delay for each recirculation loop
Additionally, write-control of scalarTransport was transferred from controlDict to the function object, and enabled UList parameters in interpolateXY for wider applications.
Previous status
Existing boundary condition: outletMappedUniformInlet
- Connected between a single outlet and a single inlet
- Instantaneous recirculation: no outlet-to-inlet time delay
- Optional filtration fraction is available as a constant value
- Optional offset is available as a constant value
Improvements
- Arbitrary number of outlets can be connected to a single inlet
- Each inlet can be connected to different and arbitrary combination of outlets
- Each outlet-inlet connection has:
- Optional filtration fraction as a Function1 type
- Optional offset as a Function1 type (i.e. adding/substracting a substance)
- Optional time delay (from outlet to inlet) as a Function1 type
- Each inlet has an optional base inlet-field as a PatchFunction1 type
Theory
Usage
Resolved bugs
N/A
Methodology
Remarks
- Difficult to design a simple verification test case due to the amount of data
- Verifications were carried out heuristically and manually
- No validation/benchmark available
Tests
- Cases
- Single-outlet single-inlet, pisoFoam-LES, constant time-step: 1-single-outlet-inlet.zip
- Multiple-outlet multiple-inlet, pisoFoam-LES, constant time-step: 2-multiple-outlet-inlet.zip
- Multiple-outlet multiple-inlet, reactingParcelFoam-RANS, adjustable time-step
- Scenarios
- Single/multiple-processor run
- Single/multiple-processor run with restart
- decomposePar
- reconstructPar
- redistributePar –decompose -redistributePar -reconstruct
- No collated-format tests
- Only scalar fields
Discussion
- No inlet-inlet connection
- Could not infer any necessity for an inlet-inlet connection. Happy to be proven incorrect, however.
- No constraints were put onto the input entries;
therefore, users need to use their attention
and engineering judgements to avoid
potential unphysical results
- Except negative input of time delays are suppresed to be zero without emitting any warning messages.
- For example, filtration fraction can be set to any number (e.g. more than 100%)
- Needs extensive tests to assume the functionalities safe for any single-phase, multiphase and overset finite-volume applications.
Meta-data
EP#1730
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Clean compilation (incl. submodules): -
linux64ClangDPInt32Opt(clang11) -
linux64GccDPInt32Opt -
linux64GccSPDPInt64Debug
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Alltest: No new error