NASA Trap Wing

Comparison of Tecplot Data File Formats

Tecplot 360 performance has improved significantly in the last five years, however, the performance experienced by the user varies dramatically with the file format being read. Whenever we tell a developer that a customer is experiencing poor performance, their first question is always “What data format are they reading?”. I’m writing this blog to explain why. […]

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Unsteady Data in Tecplot Files

Unsteady Data in Tecplot Files

“Big whirls have little whirls That feed on their velocity; And little whirls have lesser whirls, And so on to viscosity.” –Lewis Fry Richardson. Anyone who has watched the flow of water down a river, or the vibration of the control surfaces on the wing of an airplane, knows that fluid flow is generally unsteady (changing over time). In fact, most data, in real life, varies with time. For computational […]

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Sharing Data in Tecplot Files

Data Sharing in Tecplot Files

“Sharing is good, and with digital technology, sharing is easy.” –Richard Stallman. Tecplot divides datasets into zones. These zones may represent different areas of the physical domain, the same physical domain at different time steps, or different results that you may wish to compare. The zones may also have different dimensionality; for example there may be a mixture of 3D volume zones that contain field variables and 2D surface zones […]

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Appending Data to Tecplot Files

Append Data to Tecplot SZL Files

“Time is an Illusion.” ― Albert Einstein. High fidelity CFD solvers are generally iterative in nature. They move the solution incrementally forward in time (or pseudo time for steady-state solutions) computing each new solution based on the previous solution. CFD engineers often write a snapshot of the solutions at periodic time steps so that they can follow its progress. CFD engineers want to verify that: The boundary conditions are behaving […]

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Using the Loci-Chem Extract Utility to Create a Tecplot SZL File

By Tecplot’s Chief Technical Officer, Scott Imlay, PhD “In mathematics you don’t understand things. You just get used to them.” — Johann von Neumann I’ve written several blogs on Tecplot’s new SZL technology and how it speeds up the visualization of large CFD data sets by loading only those subzones (small chunks of data) that are needed for the desired visualization. We’ve demonstrated dramatic speed-ups for large data sets. For […]

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We put the “I” back in TecIO

TecIO Read Capability A blog by Dr. Scott Imlay, Tecplot’s Chief Technical Officer “Good things come to those who wait!” – Guinness beer advertisement For many years, TecIO has been a library of utility functions that allow you to output Tecplot binary files directly from your application. There are two versions of TecIO, one for serial output, and one for MPI-based parallel output. The serial-output version can output either classic […]

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Tecplot SZL File Output from FUN3D

FUN3D version 13, released in September 2016, supports writing binary files in the new SZL format. I’ve written in previous blogs about the benefits of SZL technology for visualization of large data files. With SZL technology, common visualization tasks are up to two orders of magnitude faster and data files are compressed by up to 50%. This change offers additional benefits to FUN3D/Tecplot users, especially for those running in parallel on […]

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NASA’s VULCAN Code Writes Tecplot SZL Format Using TecIO-MPI

In this webinar, you will hear from Dr. Robert Baurle, Research Scientist at NASA Langley Research Center, about his experience implementing the TecIO-MPI library in the VULCAN code. Watch video in MP4 format | View the slide deck in PDF format. VULCAN is a turbulent, non-equilibrium, finite-rate chemical kinetics, Navier-Stokes flow solver for structured, cell-centered, multi-block grids that is maintained and distributed by the Hypersonic Air Breathing Propulsion Branch of […]

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