Fluid Dynamics News

09 Oct 2019

Shock Mitigation: Size Matters

When it comes to shock-mitigation, bigger is truly better.Let’s consider a thought experiment: You must take the wheel of one of two cars speeding along straight tracks with no exits. Both cars are traveling at 100 km/hour, but the first is 100 meters from a brick wall while the second is only 10 meters from an identical wall. There is nothing to do but decelerate before the crash, and assuming your decision is guided by self-preservation the choice is obvious. Why? Because even the best tactical driver can’t overcome physics…

02 Oct 2019

New Pusher Tugs for Hidrovias do Brasil

Two new Robert Allan Ltd custom-designed pusher tugs are now being operated along the Amazon River system by Hidrovias do Brasil S.A. (Photo: Robert Allan Ltd)

Hidrovias do Brasil S.A. has started operating two new pusher tugs custom-designed by Vancouver, Canada based Robert Allan Ltd, pushing barges containing bulk products along the Amazon River system. This HB PIRARARA shallow-draft pusher tug and sister vessel HB PIRARUCU have a Robert allan RApide 4000-Z3 tug design and were constructed by Estaleiro Rio Maguari in Belem, Brazil.Computational Fluid Dynamics (CFD) simulations were used in the early phases of the design work to optimize the hull shapes and minimize total convoy resistance…

08 Aug 2019

MMU Studies Floating Wind Stabilization

A computer model of an offshore wind turbine supported by a semi-submerged triangular structure. Image: Manchester Metropolitan University

Academics from Manchester Metropolitan University (MMU) have won a grant to develop computer models to test the best methods to stabilize and control the motions of the turbine and its semi-submerged support structure.Wave simulation specialists hope to make offshore wind turbines in deep water more financially feasible by researching the best way to stabilize the floating pontoons they would have to sit on.Static turbines can be fixed to the ocean floor near the coast but the…

06 Aug 2019

BHGI Completes Buoy Design for NYPA

Photo: BHGI

Bristol Harbor Group, Inc. (BHGI) was contracted by the New York Power Authority (NYPA) to provide naval architecture and marine engineering services to review and analyze a Canadian Coast Guard buoy for required internal ballast and mooring in order to secure the buoy moorings in tailrace waters.NYPA’s fast water warning buoys had reached the end of their life cycle. BHGI conducted a site visit at the Moses-Saunders Power Dam in Massena, NY. The purpose of the visit was to inspect…

09 Jul 2019

Conrad to Build 'MiNO 6000' Towboat

Photo: MiNO Marine

MiNO Marine LLC said the second vessel based on its new 6000 hp inland towboat design has been contracted for and production will begin soon at Conrad Amelia Shipyard. The MiNO 6000 Class Towboat design is a modern, Subchapter M compliant vessel measuring 166 x 49 ft. with a 12-ft. depth.The towboat will be propelled by a pair of conventional propellers within Kort nozzles each driven by a 3000 hp, Tier IV compliant engine. The first vessel is fitted with EMD engines, while the second will be fitted with GE engines.The house is divided into two sections, one floating and one fixed.

07 Jun 2019

LR Approves HHI's VLCC 'Eco-Tanker' Design

Pics: LR

Lloyd's Register (LR), international provider of classification, compliance and consultancy services to the marine industry, has presented Hyundai Heavy Industries (HHI) with approval in principle (AiP) for a Very Large Crude Carrier (VLCC) ‘eco-tanker’ design, capable of using a combination of volatile organic compounds (VOC) mixed with LNG as fuel and Norsepower’s rotor sail solution for wind-assisted propulsion.This development was the result of a joint development project (JDP) collaboration between HHI…

07 May 2019

SCHOTTEL Expands High-Performance Nozzle Range

Photo: SCHOTTEL

With the launch of the newly developed SDC40 nozzle, SCHOTTEL expands its range of high-performance nozzles. The SDC40 sets new standards in terms of compact design and free running efficiency – and thus even leads to reduced operating costs compared to the nozzles of other market participants. The SDC40 nozzle also stands out with its optimally designed propeller geometries and exceptional performance characteristics. It comes equipped with SCHOTTEL patented ProAnode as standard…

12 Apr 2019

Wärtsilä Supplies Transverse Thrusters for Cruise Ships

The power rating of up to 5500 kW provides the Wärtsilä WTT series of thrusters with the thrust needed for outstanding manoeuvrability. Image: Wärtsilä

The technology group Wärtsilä has received orders to supply more than sixty of its transverse thrusters for twelve new cruise ships being built in four shipyards on behalf of six different owners during the past year.This represents the dominant share of newbuild vessels within the cruise sector during this period. The efficiency and performance of Wärtsilä’s transverse thrusters is particularly important for large cruise ships, since manoeuvring and mooring in often crowded harbours…

14 Mar 2019

Sanmar Wins Tug Order

Image: Sanmar Shipyards

Tug boat builder and a tug boat manufacturer Sanmar Shipyards has been awarded contract for true tractor configuration tug with forward mounted thrusters by Rimorchiatori Riuniti in Italy."This will be sixth example of the Turkish specialist tug builder’s, exclusive Delicay design in barely a year since the first vessel of this type was delivered to New Zealand," said a press note.Designed by Robert Allan Ltd  of Vancouver, Canada, it is designated theTRAktor 2500-Z SX, it said.Having…

03 Mar 2019

Amels Launches New 180 Yacht

Pic: AMELS

Dutch yard Amels has launched the 23rd model in its Amels 180 Limited Editions range, which has been named Papa.The 55-metre Amels 180 superyacht was the first of many new Amels superyachts nearing completion for their owners before the summer season begins.For the yacht’s crew, the launch is a milestone bringing the maiden voyage closer after many months working together with the Amels team. Captain Paul Bessant commented: “The teamwork here, the way that you feel so involved with everything, the relationship with the project managers.

07 Feb 2019

"Saint John Paul II" Delivered to Virtu Ferries

Photo: Incat

Incat delivered its latest large fast ferry, a 110-meter catamaran for Virtu Ferries of Malta dubbed Saint John Paul II.Saint John Paul II is the 44th large commercial fast ferry delivered by Incat and the sixth in excess of 5,500gt in the past decade; a decade also shared with 19 other Incat newbuilds of smaller passenger ferries and support vessels.“Using the latest computational fluid dynamics (CFD) and hydrodynamic free-running model test techniques, the well proven Incat Wave Piercing Catamaran hullform has been further developed for Mediterranean winter conditions…

16 Nov 2018

TRAktor 2500-SX Design tug Commences Operations for Svitzer

The third tug built by Sanmar Shipyards to Robert Allan Ltd.’s new TRAktor 2500-SX design commenced operations on November 1st in London for Svitzer. The tug, named the Svitzer Meridian, is the second TRAktor 2500-SX in Svitzer’s fleet and is the third of this new class of tugs to be delivered by Sanmar to international clients in just over 4 months.Above the waterline, this class of tugs feature a raised half foc’sle to provide an enhanced standard of sea-keeping when working in exposed waters.

23 Oct 2018

Automation for Ship Renewable Energy Systems Unveiled

Photo: Eco Marine Power

As part of the ongoing strategy to prepare its EnergySail and Aquarius MRE for commercial release, Eco Marine Power (EMP) unveiled further details of its automated control and monitoring systems. These will enable EMP’s technologies to integrate with existing ship-based systems. This will facilitate the seamless operation between EMP's renewable energy platforms with other equipment on ships including fuel flow meters.Three marine computer systems jointly developed with KEI System Ltd will be integrated to provide a robust…

12 Jul 2018

Hull Vane Retrofit Improves OPV’s Performance

Photo copyright: CMN

CMN Shipyard in Cherbourg, France, conducted sea trials on the June  13, 2018 on the OPV Thémis from the French Coastguard (Affaires Maritimes).The patrol vessel received a hydrodynamic upgrade at the shipyard by retrofitting the patented Hull Vane, an underwater wing which reduces the ship’s resistance. Comparison with the benchmark sea trials – conducted in January in exactly the same conditions – by CMN’s sea trial team showed a reduction in fuel consumption of 18 percent at 12 knots, 27 percent at 15 knots and 22 percent at 20 knots.

10 Jul 2018

MAN to Deliver Propulsion for Pasha’s LNG Containerships

Rendering of the new Pasha Hawaii containership (Image courtesy Pasha Hawaii)

MAN Energy Solutions said it has won an order to provide the propulsion systems for two new liquefied natural gas (LNG) fueled containership newbuildings, which will join the fleet of Pasha Hawaii, the U.S. Jones Act carrier in the Hawaii trade lane.Each system will comprise a 7S80ME-GI Mk 9.5 main engine, three MAN 6L35/44DF GenSets and an MAN Alpha FPP propeller system. The 2,525-teu vessels will be constructed at the Keppel AmFELS yard in Brownsville, Texas to Keppel's proprietary design.Bjarne Foldager – Vice President…

05 Apr 2018

Royal IHC, Jan de Nul Seal Dredge Pumps Seal

Royal IHC seals dredge pumps deal with Jan De Nul Group Photo courtesy IHC

Royal IHC has been awarded a contract for the delivery of dredge pumps by Luxembourgbased Jan De Nul Group. The agreement incorporates two onboard double-walled dredge pumps for the company’s new 18,000m3 trailing suction hopper dredger (TSHD), as well as onboard single-walled dredge pumps for two other 6,000m3 TSHDs. “We are delighted that we have secured another order from Jan De Nul Group,” says Dave Vander Heyde, CEO of Royal IHC. IHC’s decades of experience in designing pumps…

14 Nov 2017

Damen Presents ‘Gone With the Wind'

Image: Damen Shipyards Group

Marco Bovio, Senior Research Hydromechanics Engineer at Damen, presented details of internal research Computational Fluid Dynamics (CFD) based project ‘Gone With The Wind’ (GWTW). For the past two years Damen has been conducting a review of CFD technology and its applications in the maritime industry, and GWTW has been addressing one specific aspect of this. Its purpose, to look at the capability of CFD to accurately model the aerodynamic forces that act upon vessels above the waterline, as a separate analysis to those CFD studies that focus on the interactions that occur below the surface.

24 Aug 2017

Keppel AmFELS to Build Two LNG Fueled Containerships

Image: Keppel Offshore & Marine

Keppel AmFELS, a wholly owned subsidiary of Keppel Offshore & Marine Ltd (Keppel O&M) in the United States (US), has secured a contract worth more than US$400m from Honolulu-based Pasha Hawaii for the construction of two Liquefied Natural Gas (LNG) fueled containerships. The dual fuel LNG vessels will be built to Keppel's proprietary design with delivery of the first vessel expected in 1Q 2020, and the second vessel in 3Q 2020. Simon Lee, President of Keppel AmFELS said, "We are pleased that Pasha has chosen us to build their first two LNG fueled containerships to our innovative design.

28 Aug 2017

Moving Ahead Powerfully

(Photo: MAN Diesel & Turbo)

The layout of ship propellers is a balancing act between optimal power conversion and the avoidance of unwanted cavitation effects, which can result in damage to the propeller structure and higher noise levels. MAN Diesel & Turbo in Frederikshavn, Denmark, is using the computational fluid dynamics (CFD) simulation solution STAR-CCM+ from Siemens PLM Software to model cavitation and optimize ship propellers. Two mid-size container ships of 8,500 TEU – CSCL Europe and CSCL America – will be upgraded by retrofitting a efficient Kappel propeller.

12 Sep 2017

ABS, GasLog Study to Simulate LNG Boil-off

Photo: ABS

ABS, a leading provider of classification and technical services to the marine and offshore industries, and GasLog LNG Services (GasLog) have completed a joint development project demonstrating a new approach to evaluating LNG boil-off rate (BOR). GasLog is an international owner, operator and manager of LNG carriers, providing support to international energy companies as part of their LNG logistics chain. “By expanding the application of computational fluid dynamics (CFD) analysis to simulate the LNG BOR in cargo tanks…

13 Sep 2017

MAN Unveils Its New Flagship Engine

(Photo: MAN Diesel & Turbo)

MAN has revealed the successor to its 48/60CR engine in the company’s 4x line of high-performance diesel engines. The MAN 45/60CR marine diesel engine will initially be available as 12V and 14V versions that boast power outputs, of 15,600 and 18,200 kW respectively, with inline versions following at a later stage. According to Wayne Jones, Chief Sales Officer of MAN Diesel & Turbo, “The new engine combines the best features of the current 48/60CR, such as MAN’s common-rail system with ECOMAP capability…

10 Oct 2017

DNV GL Acquires ComputIT

Are F. Tjønn, CEO, DNV GL - Software (Photo: DNV GL)

DNV GL said it has acquired ComputIT, a specialist independent company for Computational Fluid Dynamics (CFD) software and R&D. ComputIT develops unique high-end technology for simulating fires, explosions and gas dispersion. “This acquisition brings us world-leading capabilities in the CFD domain,” says Are F. Tjønn, CEO, DNV GL - Software. With its roots in the offshore sector, ComputIT has also served onshore oil and gas, power generation, chemical, transport, maritime, and construction industries. It has been engaged by governmental bodies for investigation of fire accidents.

26 Oct 2017

MAN Introduces the 'Game Changer'

(Photo: MAN Diesel & Turbo)

What would Rudolf Diesel say if he could see and compare his engine versus todays’ newest diesel engine development from MAN Diesel & Turbo? As the Augsburg based engine maker claims, “A cylinder output of 1,300 kW this engine puts us to the top.” The largest version of the new engines is a 20-cylinder unit (20V45/60) comes with a limit-pushing power output of 26 MW. The new MAN 45/60CR range is a striking combination of top performance, operational flexibility and reliability.

Maritime Reporter Magazine Cover Oct 2019 - Marine Design Annual

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