Crest of the Royal National Institution of Naval Architects - Click to return to the homepage



Marintec_New_July_December 2022


Palfinger August 2022

IJME 201

Paper Title: Subcritical Wave Wake Unsteadiness



A Robbins, G A Thomas, M R Renilson and G J Macfarlane, Australian Maritime College, Australia
I W Dand, BMT Isis, UK 


Vessel wave wake in deep water is well understood, shallow water less so, specifically the effect of restricted water. This operational zone is highly dynamic and non-linear in nature, thus being worthy of closer examination. The paper reviews the primary mechanisms for unsteadiness in wave wake: starting acceleration and soliton generation. A comprehensive set of experiments was conducted using an NPL catamaran hull form to investigate unsteadiness in both wave height and wave angle. The results show that the unsteadiness was primarily due to soliton generation, and that blockage has a significant effect.  As a result, additional metrics, aimed at defining shallow water effects in the transcritical region, are proposed.


Transactions RINA, Vol 153, Part A3, International Journal Maritime Engineering, Jul-Sep 2011

DOI Number

DOI No: 10.3940/rina.ijme.2011.a3.201

Search and Order IJME papers

All International Journal of Maritime Engineering papers are listed in the RINA Publications Database. You can search the database by author name and paper title. Publications may be ordered and paid for online. Other publications are also listed, some of which may be downloaded free of charge. Follow the link to Search Publications & Order.

RINA membership

Teinbridge Propeller

Euronaval Apr - Oct 2022

Herbert Engineering

Uni Stratchclyde June 2021

Metstrade May 2022