Configure reduced coupling

Reduced coupling represents a lower-dimensional geometry in a bulk finite- element problem. The reduced-coupling section controls the representative grid, thickness, transverse cross-section basis, quadrature, and particle search. The Reduced Poisson tutorial introduces these choices through a minimal cylinder; use this page when changing the configuration.

The important distinction is between:

• the reduced or representative dimension, where coefficients are stored;

• the represented physical support, where the lifted field is evaluated; and

• the ambient space dimension, where the support is embedded.

Imported point and cell fields can be named in expressions. A variable radius, for example, is a field in the input mesh and is selected by the Input file fields option before it is used by Thickness. Distributed point ownership and search are handled by the particle-coupling infrastructure.