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Markus Holzer authored Jan 25, 2021 and Michael Kuron committed Jan 25, 2021

(and any other stencil omitting certain sub-diagonal directions)

Sebastian Bindgen authored Jan 22, 2021 and Markus Holzer committed Jan 22, 2021

This reverts commit 38d9aa5a4ace8271a2ae3c94d4ab5c4fea0120bb.

Frederik Hennig authored Nov 09, 2020 and Markus Holzer committed Nov 09, 2020

- Removed Test Notebooks
- Fixed PeriodicityHandling API
- Added GPU and OpenCL Periodic Pipe tests
- A few more minor tweaks

For some reason their result does not agree with the calculated reference velocity.
Did not check for the analytical solution.

Was only allocating buffers for GPU but then doing boundary handling on
CPU

- test_serial_scenarios already tested if waLBerla is available by catching ImportErrors
- importorskip from pytest throws another exception, which is not part of the public API
-> catching all exceptions - which is not really elegant but works

- also for default MRT methods its better to use symbolic RR's instead of inserting numeric values for them
- but then the simplification strategy developed for SRT/TRT has to be disabled
- this commit introduces two new options:
     - simplification='auto' or a custom SimplificationStrategy
     - 'keep_rrs_symbolic'=True, by default now RRs are left symbolic

are much faster in certain setups

With this update all derivatives are derived automatically with the functionality of pystencils.
Furthermore more testcases are provided.

- more time steps to get to stable solution