Figure D3. Example geometry file (example.geo)

Hivel2D users manual

The complete geometry file includes 338 nodes and 302 elements. An abbreviated version

of the geometry file is shown in Figure D3.

T1 example geometry file, contains 338 nodes, representing a bridge pier

T2 and a contraction, the contraction is steeper and rougher than

T3 the rest of the model

E4 1 5 2 1 4 1

E4 2 6 3 2 5 1

E4 3 8 5 4 7 1

E4 4 9 6 5 8 1

E4 5 11 8 7 10 1

E4 6 12 9 8 11 1

.

E4 299 335 329 328 334 1

E4 301 337 331 330 336 1

E4 302 338 332 331 337 1

ND 1

0.0000

ND 2

0.0000 50.0000

0.0000

ND 3

0.0000 100.0000

0.0000

ND 4 100.0000

0.0000 -1.0000

ND 5 100.0000 50.0000 -1.0000

ND 6 100.0000 100.0000 -1.0000

.

ND 334 2000.0000 23.0000 -20.0000

ND 335 2000.0000 41.0000 -20.0000

ND 336 2000.0000 59.0000 -20.0000

ND 337 2000.0000 77.0000 -20.0000

ND 338 2000.0000 95.0000 -20.0000

Figure D3. Example geometry file (example.geo)

The initial hot start file can be tricky. This case involves a straight reach so it is fairly

easy to set up a file with p, q, h of 60.,0., 3. as a constant throughout the domain. If the

domain is curved one might have to start with pooled flow at a single depth. The

beginning of the initial hot start file is shown in Figure D4. The initial input file is shown in

Figure D5.

The text in the hydrodynamic input file that describes each numerical input is not

actually read by the program so it can be left out or changed. The initial time-step was

chosen to produce a CFL number (Equation 15) of roughly 1 (so this time-step is chosen

as 1.0 sec). The temporal derivative

0.000

60. 0. 3. 60. 0. 3.

.

(This line is repeated at least 338 times, one line for each node)

Figure D4. Example hot start file (example.hot).

48

Appendix D Example problem