ibpm | Immersed Boundary Projection Method | Math library

To run the code, first build the executables as described below. The main executable is called ibpm and will be created in the build directory. The code reads an input file to determine the geometry, and a sample input file (for a cylinder) is contained in examples/cylinder.geom. To run the code for this example: cd examples ../build/ibpm -geom cylinder.geom. This will initialize the solver with a zero initial condition, and evolve the flow for 250 timesteps, writing binary restart files (e.g. ibpm00100.bin) and ASCII files readable by the Tecplot plotting software (ibpm00100.plt). Lift and drag forces are written to the file ibpm.force, and the command executed is written to a file ibpm.cmd (so the same run can be recreated later). The default options (numbers of gridpoints, names of output files, etc) can be changed by command line arguments. To see the available options: ../build/ibpm -h.
Building the library and executables:. The default configuration is to compile the code with the GCC compiler, with the FFTW library in a default location known to the compiler (e.g. /usr/local/lib). If this is acceptable, then to build the library and executables, all you need to do is type. from the root directory of the distribution (we will call this <ibpm>). The library and command-line tools will be generated in the build directory. To customize the build process for your system, make a copy of the file config/make.inc.gcc and modify it as needed (this file is included by other Makefiles, and the format is pretty self-explanatory). Save the new file as <ibpm>/config/make.inc and type make from the root <ibpm> directory, as before. Building and running the automated tests: make test. Building the documentation: make doc.