Idealized Inlet Test Cases Results

Information on the meanings of the IM values is found here.

The Zipped Archive contains the input and output files for each test case.

 

Version of ADCIRC Code	TAU0	Eh	IM	Zipped Archive	Graphics
44_15	0.02	2	121221	c1_KG-LS_IM-121221
44_15	0.02	2	131321	c2_KG-LS_IM-131321
44_15	0.02	2	111111	nc_KG-LS_IM-111111
44_15	0.02	2	111121	nc_KG-LS_IM-111121
44_15	0.02	2	0	orig_ADCIRC_IM-0
44_15	0.02	4	121221	c1_KG-LS_IM-121221
44_15	0.02	4	131321	c2_KG-LS_IM-131321
44_15	0.02	4	111111	nc_KG-LS_IM-111111
44_15	0.02	4	111121	nc_KG-LS_IM-111121
44_15	0.02	4	0	orig_ADCIRC_IM-0
44_15	0.02	6	121221	c1_KG-LS_IM-121221
44_15	0.02	6	131321	c2_KG-LS_IM-131321
44_15	0.02	6	111111	nc_KG-LS_IM-111111
44_15	0.02	6	111121	nc_KG-LS_IM-111121
44_15	0.02	6	0	orig_ADCIRC_IM-0
Bug Note:  There was a bug found in the code (version 44.15)  for any runs where the first digit of IM was 2 or 3.  This bug was corrected in version 44.17.
44_17	0.02	6	321221	c1_2PV-LS_IM-321221
44_17	0.02	6	331321	c2_2PV-LS_IM-331321
44_17	0.02	6	331321	c2_2PVSmag-LS_IM-331321_coef_0p28
44_17	0.02	6	331321	c2_2PVSmag-LS_IM-331321_coef_1p00
44_17	0.02	6	131321	c2_KG-LS_IM-131321
44_17	0.02	6	311121	2PV-LS_IM-311121
44_17	0.02	6	311121	2PVSmag-LS_IM-311121_coef_0p28
44_17	0.02	6	311121	2PVSmag-LS_IM-311121_coef_1p00
45_06				legacy_idealized_inlet
45_06				forward_idealized_inlet
45_06				parallel_idealized_inlet
45_08				serial_idealized_inlet
45_08				pc_idealized_inlet
45_08				parallel_idealized_inlet
45_08				hot_idealized_inlet
50_99				serial_idealized_inlet
50_99				parallel_idealized_inlet

 

Information about the naming convention of test cases:

 

Legacy. Several improvements have been made in recent versions of ADCIRC, including computation in double precision, the changeover to an improved algorithm for the integration of area around a node, and a recommended higher tolerance for iteration convergence. The result of these improvements is that output from v45.06 is not the same as (is better than) output from earlier versions using the same input data. In order to confirm that the differences are due to improvements and not bugs, v45.06 was recompiled to use single precision and the old area integration algorithm. The input files for the test cases were run just as they were for previous versions, including their old convergence tolerances—usually 1e-5. The resulting output data were labeled “legacy” and are for comparison with old versions of ADCIRC.

Forward. In order to compare the results from v45.06 with future versions of ADCIRC, the convergence tolerance was changed from 1e-5 to 1e-10 in the fort.15 files. The code was then run with no changes, i.e., in the default, as-distributed condition. The results were labeled “forward” on the results pages; these new input files will be used for current and future testing of ADCIRC.

Parallel. ADCIRC v45.06 was run in parallel on 2 CPUs to confirm that it gave the same results as in a serial run. The results were labeled “parallel” on the results pages.

Serial. This is a single processor run of an example problem; it is the same as the “forward” test of v45.06.

PC. The predictor-corrector time stepping algorithm was activated by selecting a negative time step. This test was added to the suite after I inadvertently introduced a bug into the predictor-corrector algorithm while fixing a different bug. Please note that the predictor-corrector algorithm has not been applied as broadly as ADCIRC’s default time stepping procedure. Note also that the predictor-corrector algorithm passed on four example problems (i.e., produced results very similar to “serial” test),
but failed (blew up) on the Shinnecock Inlet problem.

Hot. This test was carried out by cold starting the example problem and running it until a hot start file was generated, approximately halfway through. Then it was hot started and run to completion. The results were compared to the “serial” case, where the simulations start from cold and run all the way to completion. The purpose was to ensure that a hotstart does not change or perturb the solution. I discovered and fixed two hotstart bugs with this test case, one in 2D for input files where NOLIFA = 0, and another one in 3D.

Jason G. Fleming, December 2005