Validation: trawl (S7)

Table of Contents

• Tests
• No data yet
• NetValidation Trawl smoke report
  • S7 smoke: wake on (model) against wake off (in the measured column), reported

Generated 2026-11-03 from commit dde2de1 2026-11-03; tests run 2026-11-03T17:50:17.205 (main entry), 2026-11-03T17:51:03.969 (datasets entry), 2026-11-03T17:52:23.737 (datasets VALIDATION entry) and 2026-11-03T17:52:33.442 (datasets DATAGEN entry).

Tests

Status from the gtest XML of the last run. A DISABLED_ test fails against the current laws; its numbers are in the tables below, and it stays disabled until the owner decides the issue.

Test	Source	Status	Issues	Owner question
NetValidation_Trawl.S7_HarnessSmokeRun	NetValidation_Trawl_Test.cpp:309	passed	–	–
NetValidation_Trawl.S7_TrawlMeasurements	NetValidation_Trawl_Test.cpp:270	skipped (awaiting trawl measurements)	–	–

No data yet

No trawl measurements yet. tests/data/trawl_*.csv does not exist, so NetValidation_Trawl.S7_TrawlMeasurements skips ("awaiting trawl measurements"; plan Decisions 1). Until the data arrive the trawl path is covered by the towed panel (Validation: towed panel through the SimObject (S1)), the duality test S4 (Validation: Lader 2009 cages (S3, S4)) and the marenv grazing-wall wake test W11. Adding a tests/data/trawl_*.csv file with a provenance header enables S7 with no design change; this page then lists its provenance and the comparison.

The smoke run below exercises the S7 harness on the example trawl cone with the wake off and on; it is reported, not a validation.

NetValidation Trawl smoke report

tests/out/NetValidation_Trawl_smoke_report.txt, as the test wrote it.

NetValidation Trawl report (plan S7; MARE-0101). No trawl measurements yet (tests/data/trawl_*.csv absent): smoke run of the harness on WP-E3's trawl cone, HydroModel TwineCrossFlow (MARE-0111).

Conventions: error = model/measured - 1 (in %) for loads and coefficients, model - measured for ratios and localCd; ratio = measured/model; margin = tolerance - |error| (negative = fails).

S7 smoke: wake on (model) against wake off (in the measured column), reported

reported; 4 rows, no tolerance.

Case	Measured	Model	Error	Tolerance	Margin	Result
wake on against wake off row 1 mouth_height_m	2.666	2.677	0.422 %	–	–	reported
wake on against wake off row 1 mouth_width_m	2.666	2.677	0.422 %	–	–	reported
wake on against wake off row 1 tip_depth_m	10	10	0.000 %	–	–	reported
wake on against wake off row 1 tow_speed_m_s	1.509	1.529	1.304 %	–	–	reported

Wake log lines, wake on:

Cone: wake rebuild 1 at t = 10.0004 s (Grid 480x48x48, cutoff 0.001): 84 of 84 panels cast a wake, mean relative flow 1.49799 m/s, source velocity (1.49799, 1.74034e-13, 6.7448e-14) m/s, 88.514 ms; lumped source M = 1.25983 m^2, area 7.11352 m^2, rear centre (7.26021, 4.47869e-12, 10) m. Cable drag along the mean relative flow 260.976 N, panel drag 1448.87 N: cables and floats are 15.2632 % of the net's drag and are not in the lumped source (QF9).
Cone: wake frozen at t = 15.0008 s after 2 rebuilds: max(max|dR|, |dM|/M) = 0.00981567 < WakeTolerance 0.01.
Cone: wake rebuild 2 at t = 15.0008 s (Grid 480x48x48, cutoff 0.001): 84 of 84 panels cast a wake, mean relative flow 1.52674 m/s, source velocity (1.52674, 2.51566e-14, 3.10966e-15) m/s, max|dR| = 0.000908752, |dM|/M = 0.00981567, 88.762 ms; lumped source M = 1.27232 m^2, area 7.16618 m^2, rear centre (14.9038, 5.2834e-12, 10) m. Cable drag along the mean relative flow 267.801 N, panel drag 1519.92 N: cables and floats are 14.98 % of the net's drag and are not in the lumped source (QF9).

Wall time: wake off 3.5 s, wake on 3.7 s.