CFD OpenFoam Sauna

Introduction

Use OpenFOAM to analyze the heating of water above sauna's oven. The problem is during the winter when the water freezes.

Other possibilities would be to create a simple Laplacian solver. $\rho c_{p}{\frac {\partial T}{\partial t}}=\nabla \cdot (k\nabla T)$ but I'd like to include Navier-Stokes equations and perhaps energy equation: ice melts into water, water freezes, latent heat is released and the interfaces move.

OpenFOAM

Workflow

1. Generate mesh
   • For example: blockMesh
2. Run solver
   • Example: laplacianFoam or: buoyantSimpleFoam
3. View results
   • paraFoam

Use foamSearch <keyword> or find $FOAM_TUTORIALS -type f | grep <keyword> . For example: find $FOAM_TUTORIALS -type f | grep laplacian will show every diffusion example. Start with laplacianFoam → buoyantSimpleFoam → conjugate heat transfer examples.

Tutorials

ls $FOAM_TUTORIALS

Installation

Installation is a long process, it takes many hours using yay.

ofoam

Creating the mesh

gmsh

Gmsh to generate the triangles.

The command

gmsh model.geo -3

generates 3d triangulation.

yay -S gmsh-bin