*.pvtu) that points to each individual file. If you have a parallel code – note that it’s common to write one VTK file per MPI-rank and then create a single Parallel VTK file (e.g. With Binary Inline, the header information is distributed throughout the file which requires scanning through the entire file to gather the header information. Why? Tecplot 360 only needs to read the header information at the top of the file to understand what is going to be loaded. If you’re going to write VTK data, consider using Binary Appended as this is the most efficient format for post-processors to read. This experience will depend on disk speed, network bandwidth, and CPU. Since the disk is often the bottleneck, compression/decompression can be handled in parallel on the CPU. That said, you might see faster read/write times with compressed files. Whether or not you use compression will depend on whether file size or performance is more important. Compression is great for reducing file size, but requires CPU-time to compress/decompress data when writing/reading the file. The VTK file formats also support various forms of compression. Binary Appended – This format organizes all the XML header information at the top of the file, while all the heavyweight data is at the bottom of the file.Binary Inline – Binary inline files mix the data and XML header information throughout the file.ASCII files are larger than binary files and slow to load. ASCII – Easy to read and write, but highly inefficient.Within these file formats there are a few different ways they can be written: *.vtr – Rectilinear Grid (structured where all cell faces are axis aligned) *.vtp – Polyhedral Grids (can contain point data without cells – for particles) *.vti – Image Data (structured where all cells are the same size. *.vtu – Unstructured Grid (can contain polyhedral cells) The VTK file formats are XML-based and come in many flavors: With popular simulation codes like COMSOL, M-Star CFD, and Kestrel exporting VTK file formats, the Tecplot 360 and FieldView teams have made the investment to add (and improve) support for these file types. « Back Tecplot 360 and FieldView Add Support for VTK File Formats FieldView, Tecplot 360, Tecplot Blog December 8, 2023
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