Gregor Macfarlane
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View article: Wakesurfing, Wakeboarding, and Waterskiing: A Comparison of Wake Characteristics
Wakesurfing, Wakeboarding, and Waterskiing: A Comparison of Wake Characteristics Open
Waterskiing has been a commonplace and generally well‐accepted activity on inland waterways for many decades. More recently, there has been a significant increase in wakeboarding and wakesurfing, with the latter relying heavily upon “enhan…
View article: Performance of ocean wave-energy arrays in Australia
Performance of ocean wave-energy arrays in Australia Open
Wave energy converters (WEC) range significantly in respect of concept, technologies and design maturation, with the majority of devices at an early-commercial stage. To date, most large scale deployments have been conducted with a single …
View article: Marine vessel wave wake: Focus on vessel operations within sheltered waterways
Marine vessel wave wake: Focus on vessel operations within sheltered waterways Open
This thesis reports on an investigation into the characteristics of the wave wake generated by vessels that typically operate within sheltered waterways. It is well known that these waves can result in issues for other users of the waterwa…
View article: Mathematical models and time-frequency heat maps for surface gravity waves generated by thin ships
Mathematical models and time-frequency heat maps for surface gravity waves generated by thin ships Open
Recent research suggests that studying the time-frequency response of ship wave signals has potential to shed light on a range of applications, such as inferring the dynamical and geometric properties of a moving vessel based on the surfac…
View article: SUBCRITICAL WAVE WAKE UNSTEADINESS
SUBCRITICAL WAVE WAKE UNSTEADINESS Open
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 rev…
View article: AN EXPERIMENTAL STUDY OF SHIP MOTIONS DURING REPLENISHMENT AT SEA OPERATIONS BETWEEN A SUPPLY VESSEL AND A LANDING HELICOPTER DOCK
AN EXPERIMENTAL STUDY OF SHIP MOTIONS DURING REPLENISHMENT AT SEA OPERATIONS BETWEEN A SUPPLY VESSEL AND A LANDING HELICOPTER DOCK Open
Hydrodynamic interactions during Replenishment at Sea (RAS) operations can lead to large ship motions and make it difficult for vessels to maintain station during the operation. A research program has been established which aims to validat…
View article: INSIGHTS INTO THE FLOW WITHIN THE WELL DOCK OF A MOTHERSHIP DURING FEEDER VESSEL DOCKING MANOEUVRES
INSIGHTS INTO THE FLOW WITHIN THE WELL DOCK OF A MOTHERSHIP DURING FEEDER VESSEL DOCKING MANOEUVRES Open
An experimental campaign has been undertaken to explore the flow around a feeder vessel as it manoeuvres in and out of the well dock of a mothership. The parent hulls for this study are drawn from the floating harbour transhipper concept c…
View article: Spectrogram analysis of surface elevation signals due to accelerating ships
Spectrogram analysis of surface elevation signals due to accelerating ships Open
Spectrograms provide an efficient way to analyse surface elevation signals of ship waves taken from a sensor fixed at a single point in space. Recent work based on a simplified model for the ship's disturbance suggests that matching the sp…
View article: Spectrogram analysis of surface elevation signals due to accelerating\n ships
Spectrogram analysis of surface elevation signals due to accelerating\n ships Open
Spectrograms provide an efficient way to analyse surface elevation signals of\nship waves taken from a sensor fixed at a single point in space. Recent work\nbased on a simplified model for the ship's disturbance suggests that matching\nthe…
View article: Tasmania's Renewable Energy Future - Submission to the Draft Tasmanian Renewable Energy Action Plan to the Tasmanian State Government
Tasmania's Renewable Energy Future - Submission to the Draft Tasmanian Renewable Energy Action Plan to the Tasmanian State Government Open
This submission has been prepared as a contribution to the development of the Draft Tasmanian Renewable Energy Action Plan 2020 (TREAP). The analysis responds to the specific questions posed in the TREAP while also outlining a wider range …
View article: Experimental validation of a CFD model for inline force and bow wave height on a vertical cylinder moving in waves
Experimental validation of a CFD model for inline force and bow wave height on a vertical cylinder moving in waves Open
This paper focuses on the inline force and bow wave height on a surface–piercing vertical cylinder moving at a constant forward speed in calm water and in waves. A Computational Fluid Dynamics (CFD) model has been developed using Caelus® o…
View article: Safety Analysis of a New and Innovative Transhipping Concept: a Comparison of two Bayesian Network Models
Safety Analysis of a New and Innovative Transhipping Concept: a Comparison of two Bayesian Network Models Open
The floating harbour transhipper (FHT) is a new and innovative concept designed to improve the efficiency of bulk commodity export. As with all new and untested maritime systems, a rigorous safety analysis is essential prior to the operati…
View article: Parametric search and optimisation of fast displacement hull forms using RANS simulations of full-scale flow
Parametric search and optimisation of fast displacement hull forms using RANS simulations of full-scale flow Open
A methodology to derive parametric hull design candidates with a specified displacement and initial stability is introduced. A gradient-free search and optimisation algorithm coupled to a RANS CFD solver is then used to identify efficient …
View article: Power performance prediction for a vented oscillating water column wave energy converter with a unidirectional air turbine power take-off
Power performance prediction for a vented oscillating water column wave energy converter with a unidirectional air turbine power take-off Open
This paper presents experimental performance results for a new concept of Oscillating Water Column (OWC) Wave Energy Converter (WEC) hereby referred as UniWave. The operating principle for this device utilises air valves that open during t…
View article: Modelling of a Damped Generic Submerged Spherical Wave Energy Converter in Resonance
Modelling of a Damped Generic Submerged Spherical Wave Energy Converter in Resonance Open
Understanding the importance of nonlinear effects on wave energy converters (WECs) is key to an accurate prediction of the power take-off (PTO) and design parameters during the development stage. The current study applies a fully nonlinear…
View article: Non-linear CFD modelling of a submerged sphere wave energy converter
Non-linear CFD modelling of a submerged sphere wave energy converter Open
The use of wave energy converters (WECs) as a renewable source of energy is quickly becoming a reality with many prototype designs currently being tested at both model and full scale. Analytical and numerical modelling has been used extens…
View article: Improving the hydrodynamic efficiency of an offshore OWC wave energy converter through changes to the submerged depth of the OWC front face
Improving the hydrodynamic efficiency of an offshore OWC wave energy converter through changes to the submerged depth of the OWC front face Open
Offshore oscillating water column (OWC) device is arenewable wave energy conversion (WEC) device that ispromising to extract ocean wave energy through the waves-OWCchamber hydrodynamic interactions. A goodunderstanding of these interaction…
View article: Physical testing of rigid hull inflatable boat and mother ship interactions for launch and recovery simulation validation
Physical testing of rigid hull inflatable boat and mother ship interactions for launch and recovery simulation validation Open
The LAURA JIP (LAUnch and Recovery system for Any small navy craft) is developing a naval Launch and Recovery (L&R) standard which will allow ships from various Navies to exchange small Rigid Hull Inflatable Boats (RHIBs) with each other. …
View article: Viscous effects on the performance of wave energy converters in shallow water
Viscous effects on the performance of wave energy converters in shallow water Open
The use of wave energy converters (WECs) as a renewable source of energy is quickly becoming a reality with many prototype designs currently being tested in real wave environments around the world. Mathematical modelling has been used exte…
View article: Experimental investigation into the attenuation of the incident wave field by wave energy converters
Experimental investigation into the attenuation of the incident wave field by wave energy converters Open
Wave energy conversion is a field of endeavour whichhas been witness to commercial enterprise at unprecedentedlevels over the previous decade. There are however numerousroad blocks which stand in the way of developers, not least isthe cost…
View article: Experimental investigation of WEC array interactions
Experimental investigation of WEC array interactions Open
The Australian Maritime College (AMC) with partner Swinburne University of Technology, is addressing a critical knowledge gap in understanding the performance of ocean wave-energy devices in arrays when operating in relatively close proxim…
View article: Development and validation of a non-linear seakeeping tool for high speed craft
Development and validation of a non-linear seakeeping tool for high speed craft Open
This paper provides an overview of on-going development and validation of a non-linear time domain panel method for high speed craft operating in waves. The application of the method to the prediction of hydrodynamic loads and seakeeping b…
View article: The Bombora wave energy converter: A novel multi-purpose device for electricity, coastal protection and surf breaks
The Bombora wave energy converter: A novel multi-purpose device for electricity, coastal protection and surf breaks Open
New methodologies and techniques are necessary for developers of ocean wave energy converters (WEC) to overcome barriers to the development of their technology and contribute to making them competitive. One aspect of particular importance …
View article: Transhipment of bulk ore products using a floating harbour transhipper
Transhipment of bulk ore products using a floating harbour transhipper Open
Transhipping bulk ore products such as iron ore and coal is often considered an attractive alternative to direct shipping from large port facilities. This is particularly true when the latter involves considerable cost due to major dredgin…
View article: Inflatable Lifejacket Requirements for Encumbered Military Personnel
Inflatable Lifejacket Requirements for Encumbered Military Personnel Open
Military personnel’s equipment has become heavier in recent years in order to provide improved combat protection. These encumbered personnel are required to wear a lifejacket for operations over water. Yet, only limited published research …