You can control the seed density by specifying any of the following:
Average element size for the entire part or part instance.
Number of elements desired along an edge.
Average element size along an edge. (If the edge length is not an integer multiple of the element length, ABAQUS/CAE will change the element length slightly to obtain an integer number of elements along the edge.)
Bias ratio and number of elements desired along an edge. The bias ratio is the ratio of the largest element to the smallest element along an edge. This method results in a nonuniform distribution of elements along the edge as long as the bias ratio is not equal to one.
Seeds created by specifying an average element size for the entire part or part instance are called part seeds or instance seeds, respectively, and appear in white; seeds created using the other three methods are called edge seeds and appear in magenta. Edge seeds always override part or instance seeds; therefore, when you specify the average element size for the entire part or part instance, part or instance seeds appear only on edges of the region that do not already have edge seeds. New edges created by partitioning are given part or instance seeds by default.
When you seed an edge of a region that is assigned the swept or revolved mesh technique, the edge seeding tools automatically propagate seeds from the selected edge to the matching edges in the region. In other words, the seeds on the face or edge at the beginning of the sweep path are propagated automatically to the face or edge at the end of the sweep path. Likewise, the seeds created on one edge along the sweep path are propagated automatically to the other edges along the sweep path. As a result, even though you select a single edge of a face to seed, ABAQUS/CAE will propagate the seeds to additional edges and faces. For more information, see “What is swept meshing?,” Section 17.10.1.
For detailed instructions on prescribing seed density, see the following sections: