Ignis—unsteady laminar flame solvers

• Diffusion flame
• Premixed flame
• Flamelet (mixture fraction coordinate)

Includes soot formation and radiative heat transfer.

Build and installation

1. Create and navigate into a top-level build directory
2. Configure CMake: cmake ..
3. Build Ignis: make
4. Install Ignis: make install

Executable is installed in /run/ignis.x

Required software

• CMake 3.15+
• C++17
• SUNDIALS
  • CVODE and KINSOL
• YAML
• SootLib
• RadLib

Optional software:

• Doxygen (for building documentation)
• graphviz (for Doxygen)

Docker

A Dockerfile is included with the code in the docker folder. With docker installed you can build fully functional image with the code and all dependencies. See /docker/Dockerfile. A video showing how to use it is available here.

Documentation

Documentation is availale at ignite.byu.edu/ignis_documentation.

Using Ignis

Ignis is called from the command line with one of four command line options:

• ./ignis.x premixed
• ./ignis.x diffusion
• ./ignis.x diffusion_table
• ./ignis.x flamelet If no option is set the code defaults to premixed. Each of these options has a corresponding driver function that sets up and runs the case. The driver functions read case parameters from corresponding input files:
• input/input_premixed.yaml
• input/input_diffusion.yaml
• input/input_diffusion_table.yaml
• input/input_flamelet.yaml