This repository provides an interface for applying domain-decomposed solutions of fluid flow ODEs via the Schwarz alternating method through the pressio-demoapps solver and sample problem suite. This serves as a launching point for exploring Schwarz coupling for advection-dominated systems, as well as coupling full-order ("high-fidelity," FOM) solvers to data-driven projection-based reduced-order models (PROMs) via Pressio. The framework exemplified in the test cases (in tests_cpp/) should be easily extensible to any sample case provided by pressio-demoapps, but as of now is compatible with the 2D shallow water equations, Euler equations, and Burgers' equation. At some point this code may be reworked to apply more generally to codes other than pressio-demoapps, but is restricted to this code and cases for now.
Executing the test cases requires a copy of the pressio-demoapps source (which has bundled the Eigen library) and the pressiosource. Building and executing the test cases can be performed as
git clone [email protected]:Pressio/pressio-schwarz.git
export CXX=<path-to-your-CXX-compiler>
export PDA_ROOT=<path-to-pressio-demoapps-root>
export PRESSIO_ROOT=<path-to-pressio>
cd pressio-schwarz && mkdir build && cd build
cmake -DPDA_SOURCE=${PDA_ROOT} -DPRESSIO_SOURCE=${PRESSIO_ROOT} ..
make -j4
ctest -j4
Python utilities for data extraction, visualization, PROM preparation, and error measurement can be found in the python/ directory. Refer to the README there for instructions on installing and using the associated local package.
A C++ utility for executing a large number of pressio-demoapps and pressio-schwarz simulations from YAML input files is provided in the pdas-experiments repository. This vastly simplifies the numerical experimentation process for the parameterized ODEs supplied by pressio-demoapps, and also serves as a repository for input files associated with experimental campaigns presented in publications.