GiD can generate three types of mesh: body-fitted, embedded and Cartesian. We will focuse on the embedded type in this chapter.

This mesh type corresponds to an embedded mesh (not fitted to the contours of the embedded closed region). This kind of models have one or more geometrical volumes (the calculation volumes) and an embedded closed region. The calculation volumes are meshed in a body-fitted way, and its nodes have the extra information of (signed) distance to the contours of the embedded region.

It has to be noted that the definition of the embedded region is not needed to be watertight, so GiD can manage definitions with small gaps or overlapping entities.