Hivel2D users manual
3 Developing an Application
The basic steps to developing an application of HIVEL2D are as follows:
a. Generate the grid:
(1) Number the grid intelligently.
(2) Identify inflows and outflows.
b. Develop a hydrodynamic input file.
c. Develop a reasonable hot start file.
d. Run the model (probably several times). If necessary, refine the grid and interpolate
a new hot start file using INTRPL8.EXE (Appendix D).
e. View the output files in Surface Water Modeling System (SMS) or in any other
graphical program.
f. Examine the solution for reasonableness.
Hivel 2D (version 2.0) uses SMS (Brigham Young University, 1997) as the pre- and
postprocessor for programs involving two- dimensional finite element meshes. It was
developed by the Engineering Computer Graphics Laboratory at Brigham Young
University for the U.S. Army Engineer Waterways Experiment Station.
Grid Generation
To a large degree the quality of the grid determines the accuracy and stability of the
model. The first step in grid generation is getting the necessary geometry information into
the grid generator. Critical elements such as points on transitions, bridge piers, and curves
should be put into the grid generator. One method involves drawing the structure to be
modeled in three dimensions in a CAD program, and then extracting the critical points.
These critical points are then put into a grid generator.
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Chapter 3 Developing an Application
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