ABSTRACT
It was noted in Chapters 1 and 2 that the term “conceptual model” can be used broadly to cover both black-box models based on systems analysis and mathematical models based on continuum mechanics. In this book, however, the term conceptual model will be used in the restricted sense of models that are formulated on the basis of a simple arrangement of a relatively small number of elements, each of which is itself a simple representation of a physical relationship.
