Library

2572 match your search

To exclude cerebral aneurysms from the parent artery circulation, Flow Diverters (FD), which are designed as stents with a dense mesh, are placed across the neck of the aneurysm. The desired result of this procedure is the reduction of blood flow velocities and pressures inside the aneurysm to prevent rupture. Computational Fluid Dynamics (CFD) can be employed using the concept of virtual surgery to simulate the effects of the FD and ensure a successful treatment. Here, we present a comparison between simulation of the FD porosity using Darcy’s law (Siemens AG, CFD Research Prototype) with...
The USNRC office of Nuclear Regulatory Research has completed a series of simulations to study the stratification and entrainment behavior of a sodium pentaborate solution injected from the Standby Liquid Control System (SLCS) into the lower plenum of a Boiling Water Reactor (BWR). The simulation domain includes the BWR lower plenum along with the control rod drive tubes and major support structures as well as the SLCS piping. A challenge for the Computational Fluid Dynamics (CFD) model development is the relatively large and complex domain along with the large variation in scales between the...
A virtual reactor model for a Westinghouse Pressurized Water Reactor (PWR) has been developed by the Consortium of Advanced Simulation of Light Water Reactors (CASL). The model includes all the geometric details of the Westinghouse PWR internals and the 17x17 fuel assemblies. The model was built to obtain the high fidelity data required to solve the challenge problems faced by the nuclear industry. In the virtual reactor, the flow and the conjugate heat transfer were modeled. The fission power profiles for each fuel rod were produced by the Westinghouse neutronic code ANC. The model was...
Evaluating aerodynamic drag of class 8 trucks is critical for improving fuel economy, meeting EPA targets and maintaining a competitive edge in the industry. For a standard tractor trailer configuration, aerodynamic drag is responsible for approximately 30% of total fuel consumption. Reducing drag by 3% would improve fuel economy by 1%, which demonstrates the need for accurate methods to predict aerodynamic drag. Depending on available resources, truck companies may use one or more tools to evaluate drag, including wind tunnels and CFD software. This presentation focuses on the application of...
Clients using STAR-CCM+ for vehicle simulation have been growing at a steady rate. A wide range of applications are being used in the ground transportation sector, all the way from vehicle aerodynamics, passenger thermal comfort, to HVAC and component analyses. Clients today use STAR-CCM+ to optimize vehicle aerodynamic designs. Other clients are taking advantage of automation in STAR-CCM+ to achieve one day turn-around for front end cooling. The ability to run combined fluid solid models are allowing engineers to start modeling thermal cycles which in the past have been limited to just test...
To correctly simulate flow through the engine of a full-sized passenger bus in an open jet wind tunnel, Jacobs designed a Flow Control Device (FCD) for a recently commissioned open jet wind tunnel. The FCD is a wing to adjust the flow distribution around a vehicle. STAR-CCM+ surface wrapping technology was used to create a water-tight surface of a very detailed geometry of a bus in the wind tunnel. Pressure coefficients near the engine of the bus in ‘free air’ were used as the reference for the design of FCD in the wind tunnel. Experimental measurements during commissioning of the wind tunnel...
Archery arrows are complex, highly-tuned dynamical systems. Yet they are often designed based on tribal knowledge, anecdotal evidence and/or trial-and-error. Application of first-order aerospace analysis practices for a non-traditional, nonaerospace client specializing in the development of archery equipment resulted in the development of a new, high-quality product and superior insight into the physics that make it a success. This presentation will describe the concept development, analysis process and some key findings for an arrow fletching design cycle, as well as provide a brief overview...
In the ever accelerating pace of the product development cycle, the use of cloud based HPC and macro based automation has been playing a critical role in pushing the boundaries of Trek's engineering. This presentation will focus on Trek's design iteration process with STAR-CCM+ macro automation utility VSIM and subsequent CFD solving on a cloud cluster. The successful integration of the on-demand cloud HPC and local process automation lead to significant increase in productivity, such as improvements in analysis turn-around time reduction and rapid design iterations. This cost-effective, high...
Zipp Speed Weaponry used CFD simulation results, wind tunnel testing and their own creativity to rapidly develop a state-of-the-art product that succeeded in an already crowded bicycle racing wheel market. Their Firecrest wheels were a technological breakthrough that delivered 100% category revenue growth and the addition of over 120 new manufacturing jobs in Indiana in just two years, confirming their place as the established leader in this hotly contested market. With the help of Intelligent Light and CD-adapco, the company is working to rapidly develop a well-engineered, highly automated...
The presentation will be divided in the following sections: 1. Cervelo Product Line Cervelo's product line description and the importance of aerodynamics. 2. New Methodology With the success of the aerodynamic development of the P5, Cervelo is looking to implement the same methodology to the rest of the product line. 3. Cervelo Aerodynamic Development How was the previously defined methodology applied to a new product and the benefits in terms of ideas and turnaround time. 4. Future work A description of the opportunities that STAR-CCM+ has been able to open for Cervelo.

Pages