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HDF5 formats in Tecplot

"portable, with no vendor lock-in"

Rounding off this set of articles on data formats are HDF5 and CFF, support for which is introduced in the new Tecplot Beta release. A general purpose format – see this article for an interesting discussion of the pros and cons – the HDF5 has plenty of promise for CFD. It isn’t always a snap to read these formats, as pointed out here. If your solver writes this format and Tecplot doesn’t read it in right, let us know!

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OBJ models in CAD and CAE

"the format is indeed supported in almost all CAD software"

Developed for visualization, where appearance trumps precision, the OBJ format’s documentation was thrown open to all. The intended effect was widespread adoption and interoperability. The unfortunate side-effect is that engineers who prefer NURBS models are often handed OBJ files instead. If the formats proliferate in the world of CAD, can CAE be immune? This video shows how Pointwise can read such data as either a geometry or a grid, depending on which you prefer.

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Dimensioning Polygon-format CAD

"there are many disadvantages to representing an object using polygons"

The unfortunate reality is that you sometimes have no option but to use a polygonal representation even if a NURBS model is more appropriate. Measurements made off such models are inherently limited in precision, but can be useful provided you keep this limitation in mind. This article – and this 60 second video – explain how you can not just measure but dimension polygonal formats such as OBJ and STL.

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KFour Metrics offers technology solutions for engineering design, simulation and optimization.

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