Lloyd’s Register is hosting a ship scale hydrodynamics simulation workshop on 25 November 2016, at their Global Technology Centre in Southampton.
Ship designers from around the world have contributed blind numerical predictions of ship scale performance.
The main objective of the workshop is to compare these results with LR's sea trials measurements, to assess and develop the capabilities of the numerical tools in ship scale and increase confidence in ship scale Computational Fluid Dynamics (CFD).
Everyone is welcome to come and contribute to the workshop, join the discussion and get a copy of the full report with results, analysis and recommendations.
The workshop agenda will be uploaded here shortly.
How did it work?
Step 1 - Geometry files
Participants filled in this simple form to download the hull and propeller geometries of the subject vessel (16.9k DWT General Cargo Vessel REGAL) as well as simulation conditions which are identical to the sea trials records. The geometries are based on 3D laser scans of the propeller and hull and are supplied in STL format.
Step 2 - Simulations of the cases and results
Participants sent us blind numerical results for the subject vessel for self-propulsion and also resistance, propeller’s open water and cavitation conditions.
LR distributed a document in September 2016 that defines the format of the results to be submitted so that comparisons are unambiguous.
(Please note - all results submitted by participants will be kept anonymous)
Four modelling scenarios were proposed:
1. Ship scale resistance simulation (4 speeds). As there are no ship scale resistance measurements, all results to be compared against each other. This scenario is used to investigate the hull-propeller interaction coefficients.
2. Ship scale propeller open water characteristics computations (4 speeds). As there are no ship scale open water propeller measurements, all results to be compared to each other. This scenario is used to investigate the hull-propeller interaction coefficients.
3. Ship scale self-propulsion simulation (3 speeds). The results to be compared with ship scale measurements performed by LR.
4. Ship scale propeller cavitation (1 condition). The visual cavitation pattern will be compared with ship scale high speed video recordings done by LR.
Step 3 - Purchase tickets for the workshop
The workshop will be structured to go through comparisons of all scenarios and provide opportunities for participants to discuss the CFD methods applied. The deadline to purchase tickets for the workshop is November 18, 2016.