What are Interpolation options for creating a Field from a Point Map

Objective:

Learn about different interpolation options of the Field from Point Map block.

Procedure:

The Field from the Point Map block is used to create a Scalar, Vector, or Temperature Field using a Point Map that can be imported or created in nTop.

This image shows the 3 possible overloads for the Field from Point Map block. Each overload can accept a different input Point Map. The three Point Map input types are Scalar Field, Temperature Field, and Vector Field.

Interpolation:

  •  
    • Nearest: Values maintain the exact value of the nearest point.
    • Barycentric: Values are interpolated linearly from the three closest points, which define a tetrahedral. This method is recommended for point maps extracted from tetrahedral mesh, like Von Mises Stress Point Map or Temperature Point Map.

A visual display of the two Interpolation types used for the Field from Point Map block. The field on the left is using Barycentric Interpolation and the field on the right is using Nearest Interpolation.

Note: All fields created will be extrapolated based on the Interpolation option. If you wish not to extrapolate, set the value 0 to everything outside the domain. You can do it with a combination of If-Else block and Less Than or Equal to block. If you have vertices instead of an Implicit Body, you can use the Delaunay Volume Mesh block to create a convex hull and use its implicit property.

All fields created will be extrapolated based on the Interpolation option. If you wish not to extrapolate, set the value 0 to everything outside the domain. You can do it with a combination of If-Else block and Less Than or Equal to block. This image shows the If-Else block setup and resulting field contained inside the specified implicit body.

Example File:

Example file

More on this topic:

Keywords:

 import simulation field map point fields interpolation extrapolation linear random points interpolate extrapolate nearest barycentric natural 
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