Validation of full-scale delivered power CFD simulations

A new paper published in Ocean Engineering Journal:

Michal Orych, Sofia Werner, Lars Larsson, 2021. Validation of full-scale delivered power CFD simulations. Volume 238, 15 October 2021, 109654

https://www.sciencedirect.com/science/article/pii/S0029801821010301

Abstract:

Verification and Validation of CFD simulations of delivered power at full-scale are carried out for a single screw cargo vessel. Numerical simulations are performed with a steady-state RANS method coupled with a body force propeller model based on a lifting line theory. There are no significant differences in the uncertainty levels between model and full-scale computations. The finest grid exhibits the numerical uncertainty of 1.40% at full-scale. Computed results are compared with sea trial data for three sister ships. Special attention is paid to the effect of roughness on the hull and propeller. The comparison error for the delivered power is about 1% which is significantly lower than the experimental uncertainty.

Keywords:

Delivered power; Full-scale; Hull roughness; Self-propulsion; Uncertainty; Validation; Verification; CFD

SHIPFLOW 7.0 coming soon

SHIPFLOW 7.0

The main feature of the new major release is the MOTIONS 7 module for seakeeping and dynamics of floating vessels and structures.

MOTIONS 7 highlights:

most advanced fully nonlinear, unsteady potential flow commercial code on the market
multiple, arbitrary floating bodies
regular, irregular and short crested waves
mooring lines, fenders, spring attachments (e.g. to carriage)
external force model interface ( Flettner rotors, wing sails, fins )
applications: ships, ship to ship interactions, semi-submersibles, floating platforms, floating wind mills

SHIPFLOW 6.6 released

SHIPFLOW 6.6.00

SHIPFLOW 6.6 includes developments and refinements in the following areas:

- Full scale power prediction

- Roughness effects

- Parametric appendages

- Inbuilt Wageningen B-Series propeller geometry

- Twin-skeg gridding

- Free sinkage and trim calculations with VOF solver

- Appendages and selfpropulsion with VOF solver