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Empty 2D

An empty 2D boundary condition is used in reduced dimension cases. The empty 2D boundary condition should be applied on both boundaries which are normal to the reduced coordinate direction.

empty 2d boundary condition window in simscale
Figure 1: Empty 2D boundary condition set up.

As an example, in the figure below, by specifying an empty 2D boundary condition on the two faces highlighted in blue, the y-direction won’t be solved during the simulation.

empty 2d boundary condition setup
Figure 2: External aerodynamics case. By defining an empty 2D condition to the highlighted faces, the direction normal to the assignments is no longer solved.


Notice that the reduced dimension (y in this case) is only one cell thick signifying a 2 Dimensional mesh in the xy plane.

Last updated: September 15th, 2020

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