zaibinlin / cyclicamichannel

This repository contains the implementation of an OpenFOAM model for the case of flow old underground river with a roof supported by columns (inspired by a few running under Buenos Aires). The case implements offset cyclicAMI patches to simulate only a portion of the tunnel, allowing to quickly reach steady-state conditions.

CyclicAMIChannel

This repository contains the implementation of an OpenFOAM model for the case of flow through an old underground river with a roof supported by columns (inspired by a few running under Buenos Aires).

The case implements offset cyclicAMI patches to simulate only a portion of the tunnel, allowing to quickly reach steady-state conditions.

Using AMI means that the mesh doesn't need to match perfectly between patches, which makes things much simpler to set up. Creating perfectly matching patches is very difficult/impossible with some meshers.

Most flow variables, such as velocity and phase fraction, can be mapped directly between patches. However, as flow steadily goes downward, the p_rgh needs to have a discrete jump between both ends. To this end, the case includes a custom boundary condition called p_rghJumpAMI which introduces the correct offset based on the density of the fluid on each face.

It uses interFoam to solve the free surface, and URANS treatment to solve the turbulence, using the kOmegaSST model.

Getting Started

• Compile the boundary condition running wmake libso on the appropiate folder.
• Run the prepare.sh to generate the mesh and set up the simulation.
• Then run the case with interFoam

Results

License

This project is licensed under the MIT License - see the LICENSE.md file for details

Author

Nicolás Diego Badano (https://www.linkedin.com/in/nicolas-diego-badano/)