Version: 9.12.0

A field in MEDCoupli,g represents some physical quantity associated with the spatial domain. This is not a continuous description of the physical quantity over the domain, and hence a field has a finite set of values, associated to some constituents of the mesh (nodes, cells, or more complicated).

At a low level, a field is a Arrays of data DataArray associated to a given mesh. A field can have more than one component (vector or tensor field), for example the 3 components v_x, v_y, vz of a velocity field.

Finally, and for interpolation purposes only, one needs to define the nature of a field (is it an extensive field, like mass, or an intensive field, like temperature, etc ...). This is covered thoroughly in the interpolation pages: