OpenFOAM offers the capability for post-processing OpenFOAM cases with Fieldview. The method involves running a post-processing utility foamToFieldview to convert case data from OpenFOAM to Fieldview.uns file format. For a given case, foamToFieldview is executed like any normal application. foamToFieldview creates a directory named Fieldview in the case directory, deleting any existing Fieldview directory in the process. By default the converter reads the data in all time directories and writes into a set of files of the form <case>_nn.uns, where nn is an incremental counter starting from 1 for the first time directory, 2 for the second and so on. The user may specify the conversion of a single time directory with the option -time <time>, where <time> is a time in general, scientific or fixed format.
Fieldview provides certain functions that require information about boundary conditions, e.g. drawing streamlines that uses information about wall boundaries. The converter tries, wherever possible, to include this information in the converted files by default. The user can disable the inclusion of this information by using the -noWall option in the execution command.
The data files for Fieldview have the .uns extension as mentioned already. If the original OpenFOAM case includes a dot ‘.’, Fieldview may have problems interpreting a set of data files as a single case with multiple time steps.