Verifying Surface Normals in Integral Calculations

Calculation, Error, Tecplot 360, Vector May 9, 2019

Problem: How do I verify the direction of my unit surface normal vectors to make the correct integrations? If my surface normals point in an inconsistent direction from one timestep to another, how do I correct the value of my integral? From the User’s Manual: “Integrations involving surface unit normals, such as Mass Flow Rate, and Forces and Moments integration, rely on surface unit normals pointing in a consistent direction. […]

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Calculating Average Normal Velocity to Iso-Surface

Calculation, Tecplot 360, Vector April 16, 2019

Problem: How do I calculate the average normal fluid velocity (or any vector variable) going through an iso-surface? Details: Or stated another way, “I am trying to use a vector dot product with unit normal integration to get the average normal velocity through an extracted iso-surface.”  This question originally relates to this scenario, but it can be used for calculating the average flux though a surface for various cases. Solution: […]

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