Time Strands and the Zone Style dialog

When working with transient datasets, Tecplot implements “Time Strands”. Time Strands are assigned to a group of zones which represent the same object. For simple transient datasets, sometimes only one Time Strand is used. Whereas more complex datasets will implement multiple Time Strands. For example, if you are plotting a jet, typically there will be one Time Strand per wing, one for the fuselage, and one for the tail. Time […]

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Load Multiple Files at Once with a Macro

Problem: I have many files that need to be loaded into Tecplot but loading them all is tedious. I want to load multiple files at once without having to select each individual file. Solution: For files that only differ by a constant, PyTecplot or macro scripts can be configured to load your datasets quickly and accurately. For example, if you have a directory containing many files: file001.plt file002.plt etc. You […]

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How do I create radial and theta slices?

Radial slices Compute the equation: {R} = sqrt(X**2 + Y**2) in the Data -> Alter -> Specify Equations dialog.  Turn on iso-surfaces in the Plot Sidebar. Then display an iso-surface of constant R. Theta slices Compute the equation: {Theta} = atan2(X,Y) in the Data -> Alter -> Specify Equations dialog. Then display an iso-surface of constant Theta.  Note that due to a singularity at the origin you may get some strange shapes […]

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Calculating a New Variable

Creating a new variable or referencing a variable by name requires surrounding it in curly braces. Variables on the right side of equations may be referenced by two other methods:  First, by the variable index. Second is to use variable assignment letter codes. In this example, we’re using ‘u’ and ‘v’ which represent the variables assigned to the U and V vector components in Plot -> Vector -> Variables dialog.  […]

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How do I Install PyTecplot?

First off, PyTecplot requires an installation of Tecplot 360 2017 R1 or later. PyTecplot is also hosted on PyPI so you simply need to run ‘pip install pytecplot’ from a command prompt. Easy as Py! PyTecplot is also included in the Tecplot 360 installation so you can install from there if you have an overzealous firewall or want to ensure the PyTecplot version you’re installing is guaranteed to be compatible […]

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Calculating Aerodynamic Forces and Moments

The most accurate forces and moments are normally those output by your flow solver, which knows details of your solution’s boundary conditions and can use modeling such as turbulent wall functions that Tecplot cannot. If your solver’s calculations are not available, you can use Tecplot’s Analyze/Perform Integration… option with the Forces and Moments integration type. There are cases where you want more control over the calculation, however, so this document […]

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Tecplot 360 Will Not Open OneDrive Files

Problem: OneDrive has introduced a new capability called “Files On-Demand” which allows files to be downloaded on-demand. These files are not recognized by the Tecplot file dialog. If you are opening files from a OneDrive folder and receiving an error from the File Dialog, try one of the following workarounds. Solution: Upgrade to Tecplot 360 2017 R3 build 3.1 or later» Turn off Files On-Demand Right-click on the OneDrive folder […]

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Determining number of Cells in an Unblanked region

To determine the number of cells in an unblanked region, follow these steps: Define your region of interest by selecting Plot > Blanking > Value Blanking… to bring up the Value Blanking dialog to set your criteria. Anything that is blanked will be excluded in the following calculation. Once you have set your blanking criteria accordingly, generate the variable Cell Volume via the Analyze>Calculate Variables… menu and selecting it from […]

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Tecplot error at startup: X Error: GLXBadContext

Note:  This should no longer be an issue.  Download the latest release or get a free trial. Problem: Tecplot crashes with X Error: GLXBadContext. Solution: One possible cause could be due to a security issue in Xorg that disables the “indirect mode” in GLX. If that is the case then the solution is to enable the GLX indirect mode.