Table 2.

A comparison of model characteristics based on the criteria of Pope (2000).

Enhanced diffusion	ECD model
Level of description
Accurately models transport Lacks cell–cell interaction forces, or aggregation	Accurately models transport and distribution Lacks cell–cell interaction forces, or aggregation
Completeness
Total self-contained	Requires the Hematocrit field
Cost and ease of implementation
Easily implemented in existing software Stability and discretization well understood 1 Equation Takes advantage of the CD knowledge base	Can be implemented into existing software with some modifications Stability and discretization well understood 1 Equation Takes advantage of the CD knowledge base
Range of applicability
Simple geometries with parallel streamlines	Complex geometry
Accuracy
Only accurate for deposition Inaccurate for field distribution	Accurate for transport and distribution