OpenFLASH ⚡️

Open-source Flexible Library for Analytical and Semi-analytical Hydrodynamics

About The OpenFLASH Project

The OpenFLASH project is a Python package designed for solving boundary value problems using eigenfunction expansion methods. It provides a modular framework for defining complex geometries, setting up multi-domain problems, performing numerical computations, and analyzing results, particularly in fields like fluid dynamics.

When referencing this work, please reference our docs/citations.rst

License:

This project is licensed under the MIT License. See the LICENSE file for details.

How to Run the Python Code:

1. Install the package: bash pip install git+[https://github.com/symbiotic-engineering/semi-analytical-hydro.git](https://github.com/symbiotic-engineering/semi-analytical-hydro.git)
2. Install dependencies: Navigate to the project directory (if you cloned it) and run: bash pip install -r requirements.txt
3. Explore the docs/ and package/test directory: These directories contain scripts and notebooks demonstrating how to use the OpenFLASH framework for different problems. Run these examples to understand the workflow.
4. Refer to the documentation in the docs/ directory: The documentation provides detailed information on the different modules and classes within the open-flash package.

MATLAB

We also have a MATLAB code version, although the Python version is intended as primary for future development. MATLAB only supports bodies consisting of 2 concentric cylinders, rather than the arbitrary N concentric cylinders in the Python package.

See matlab/src/run_MEEM.m for the symbolic and numeric code, see matlab/test/ for some scripts to get results, and matlab/dev for various matlab experiments.

References

The following publications are relevant to this package:

1. I. K. Chatjigeorgiou, Analytical Methods in Marine Hydrodynamics. Cambridge: Cambridge University Press, 2018. doi: 10.1017/9781316838983.
2. F. P. Chau and R. W. Yeung, “Inertia and Damping of Heaving Compound Cylinders,” presented at the 25th International Workshop on Water Waves and Floating Bodies, Harbin, China, Jan. 2010. Accessed: Sep. 27, 2023. [Online]. Available: https://www.academia.edu/73219479/InertiaandDampingofHeavingCompoundCylinders_Fun
3. F. P. Chau and R. W. Yeung, “Inertia, Damping, and Wave Excitation of Heaving Coaxial Cylinders,” presented at the ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering, American Society of Mechanical Engineers Digital Collection, Aug. 2013, pp. 803–813. doi: 10.1115/OMAE2012-83987.
4. R. W. Yeung, “Added mass and damping of a vertical cylinder in finite-depth waters,” Appl. Ocean Res., vol. 3, no. 3, pp. 119–133, Jul. 1981, doi: 10.1016/0141-1187(81)90101-2.
5. D. Son, V. Belissen, and R. W. Yeung, “Performance validation and optimization of a dual coaxial-cylinder ocean-wave energy extractor,” Renew. Energy, vol. 92, pp. 192–201, Jul. 2016, doi: 10.1016/j.renene.2016.01.032.
6. K. Kokkinowrachos, S. Mavrakos, and S. Asorakos, “Behaviour of vertical bodies of revolution in waves,” Ocean Eng., vol. 13, no. 6, pp. 505–538, Jan. 1986, doi: 10.1016/0029-8018(86)90037-5.