Control the Grouping of the Elements in the FV-UNS Files

AcuFieldView supports grouping of elements into collections called regions. Information regarding which elements are grouped into a specific region is contained in an ASCII text file that is named with a .fvreg file extension (FieldView Region File).

AcuTrans writes this file whenever it converts data to the FV-UNS format. Note that AcuTrans does not provide full support for all of the flexibility that is provided by AcuFieldView through the regions file. Some examples of options that are supported within the region file but not supported by AcuTrans are the specification of rotating reference frames and cylindrical coordinate systems.

The benefits of using regions in AcuFieldView is that it permits you to toggle element groups on and off. This enables more precise control over the visualization. For example, it is possible to turn off all regions that are fluid or solid by using the Region Controls panel in AcuFieldView.

AcuTrans supports the -fvr or -fieldview_region option to control how the elements are grouped within the FV-UNS file. The default setting for this option is single. When this option is exercised, all elements are written into a single region. AcuTrans also supports the options of element_set and subdomain. When element_set is selected, each AcuSolve element set is identified as a separate region. When subdomain is selected, the elements are grouped according to their domain decomposition. Each subdomain appears as a separate region. For example, acuTrans -out -to fieldview -fvr subdomain produces a combined FV-UNS file with a separate region defined for each subdomain.
Note: When using AcuFieldView with parallel server processes, the distribution of elements among the processes is controlled by the regions that are present in the FV-UNS file. The regions are sequentially distributed to each of the parallel processes. To obtain optimal balance of the parallel post-processing, it is necessary to convert the data to FV-UNS using the -fvr subdomain option.