DARPA SUBOFF. Validation of Liquid Operating Condition for Submarine Resistance
The DARPA SUBOFF bare-hull geometry is a standard marine CFD benchmark with high-quality towing-tank data and is widely used for CFD calibration. This case uses it to benchmark the liquid operating condition in Flow360 on an external-flow problem where total resistance can be compared directly against experimental data. The benchmark covers a six-speed sweep from 5.93 to 17.79 knots. Steady Spalart-Allmaras RANS and SA-DDES results are shown showcasing how Flow360 accurately predicts the trends and magnitude of the measured resistance.
External reference data
Roddy, R. F. (1990, September 1). Investigation of the stability and control characteristics of several configurations of the DARPA SUBOFF model (DTRC Model 5470) from captive-model experiments (ADA227715). David Taylor Research Center, Ship Hydromechanics Dept. https://apps.dtic.mil/sti/citations/ADA227715
Validation plots
Comparison of Flow360 predictions against reference data. Click an image to expand.
Resistance vs velocity
Solver performance
Six SA DDES runs across the 5.93-17.79 knot speed sweep.
Mesh resolution
23.21 M nodes
Cloud cost
202 FC
Time to solution
33.1 min
Hardware
64 × H200 GPUs
Run Settings
Simulation type
Unsteady
Time settings
2,500 steps, dt = 0.00005 s