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Fluid-Based Topology Optimization of an EGR Flowsplitter
In order to meet the required Exhaust Gas Recirculation rate, EGR modules contain nowadays heat exchangers. Typically, single-pass or two-pass coolers are used. When an EGR cooler with a two-pass inlet is considered, a mass flow split ratio of 0.5 per duct is a required condition for obtaining a maximum cooler efficiency. The needed partition of the exhaust flow upstream of the cooler is achieved by using flowsplitter geometries. This presentation deals with the optimization of a flowsplitter. The objective of the study was to obtain a design with an improved flow balance. Furthermore, a...
Fluid Structure Interaction in STAR-CCM+
An overview of the challenges of FSI will be presented along with the capabilities available in the STAR-CCM+ to meet those challenges. The topics will include Data mapping techniques, Protocols and formats for exchanging data between CFD and CSM codes, Coupling methods for stability and accuracy, Techniques for dynamic fluid mesh evolution, and Validation of FSI results. A technical overview under each of these topics will be provided. A range of examples which demonstrate the STAR-CCM+ FSI capabilities and validate the accuracy will be shown. The examples span analytical and experimental...
Driving Design Innovation
In this talk, we'll focus on how leading companies are streamlining the virtual product development process by implementing four enabling technologies, namely: Process automation Scalable Computation Efficient Design Exploration, and Sensitivity & Robustness Assessment We will highlight how the HEEDS technology from Red Cedar Technology is being used to accelerate design processes, improve workflow between CAD and CAE, discover better designs, and identify the most robust designs for manufacturing. Key case studies in automotive, aerospace, life sciences and energy will be used to...
Collaborative Engineering with STAR-CCM+
The use of multi-user architectures for collaborative design has been explored on several types of engineering software. The client-server architecture of STAR-CCM+ allows collaborative simulation set-up for Computational Fluid Dynamics models. Simulation operations are completed by the server and commands are sent to the server by the client. By using the client-server architecture, users can partition the workload of the simulation set-up and decrease the time required to prepare a simulation prior to solving. Five models are tested to measure the time savings that can be achieved through a...
Aeraulic Optimization of an Electrical Box Cooling
This presentation describes the aeraulic optimization of an electrical box cooling. This equipment is present on the roof of a railway train. The challenge is to provide cooling powered only by airflow around the train, without adding fans or any other system with a cost in term of mass, deterioration of the reliability and the overall price of the equipment. We must therefore reach a sufficient air flow to perform this function. In the first stage, STAR-CCM + is used to analyze the air flow around the train and especially around the studied box. In a second step, the study focuses on...
Use of STAR-CCM+ in Marine & Off-Shore Engineering: Key Features & Future Developments
This presentation highlights features of STAR-CCM+ which make it market leader for simulation of flow and motion of floating bodies within marine and offshore industry. Examples of applications by customers are used to highlight the software capabilities and to prove the benefits of simulation. This is followed by presenting the new features that are currently under development and targeting specifically marine and offshore applications, e.g. extensions of motion modeling to allow various combinations of prescribed and free motion (like PMM-tests), extension of cavitation model, internal wave...
Unsteady Cavitation Simulation on Kappel Propeller with a Hull Wake Field
Up-to-date marine propellers are designed to accompany a certain extent of cavitation for optimum propulsive efficiency, but excessive extent and certain types of cavitation have the risk of high hull pressure pulse, blade surface erosion and thrust break down. Propeller cavitation becomes unsteady and complex due to the interaction of the propeller flow and the non-uniform wake field behind the hull. The Kappel propeller is an innovative tip-modified propeller, which shows higher propulsive efficiency and lower hull pressure pulse than conventional propellers. Unsteady cavitation simulations...
RANS Simulations of Cavitating Azimuthing Thrusters
Numerical simulations of the flow along azimuthing thruster units are becoming more mature these days. A number of steps have been made during the last decade in RANS simulations. Initially the full scale unit performance, being thrust output and power requirement, has been determined for the steady-state condition. Next the time dependent forces, which are a result of the blades passing the strut, have been quantified. These analyses have been made initially for a single unit with uniform inflow and afterwards for two units, where the jet of the upstream thruster is directed towards the...
Optimization of a Wing-Sail Shape for a Small Boat
The wing-sail is an interesting idea for sailboats, and the last America’s Cup showed that its use is possible and very effective. At the University of Pisa it was decided to use this type of sail on the small boat realised for the inter-university race “ 1001 vele ”. A first wing sail has been used in 2013 with satisfactory results, but it was evident that high improvement in the performances can be obtained. The performances of this system are impressive, but the flow is complex and the number of geometrical parameters are very high. In order to tackle this problem resort was made to a...
Investigation of Global Regular Wave Loading on a Damaged Ship using CFD
Ocean going ships undergo significant loading at sea and are designed to survive severe sea states in an intact condition. However, little consideration is given to the structural integrity of vessels which are damaged. This can be attributed to the limited knowledge of ship responses in their damaged state. An assessment on the viability of the commercial CFD package STAR-CCM+ as a tool for assessing damaged ships has been undertaken by Lougheed (2012) and Goatly (2013). A model was set up emulating experimental damaged hull sections oscillating in a tank with RANS and LES turbulence models...

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