NaokiHori / EllipsesInFlows

Navier-Stokes Solver with moving elliptic bodies

Ellipses in Flows

For circular (2D) or spherical (3D) objects, please refer to the other library.

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Overview

This library numerically solves the motion of elliptic bodies governed by the Newton-Euler equations suspended in viscous liquid by means of the finite-difference and the immersed-boundary methods.

Please refer to the documentation for details.

Features

• MPI-parallelised
• Eulerian-based (no Lagrangian points) IBM
• Collision model between ellipses

Dependency

Docker

Quick start

1. Create working directory

   mkdir /path/to/your/working/directory
   cd    /path/to/your/working/directory

2. Fetch source

   git clone https://github.com/NaokiHori/EllipsesInFlows
   cd EllipsesInFlows

3. Build

   docker build -t simplenavierstokessolver:latest .
   docker run -it --rm --cpuset-cpus="0-1" -u runner -v ${PWD}:/home/runner simplenavierstokessolver:latest
   make output
   make all

4. Run

   mpirun -n 2 ./a.out

Examples

Several examples can be found in the documentation.

1. Migration of a circular object in a shear flow
2. Segré-Silberberg effect
3. Rotation of an ellipse in a shear flow
4. Suspension in a plane Poiseuille flow