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Computational Fluid Dynamics (CFD)
The Silicon Valley Office of Applied Research Associates has a wide range of experience in the analysis of fluid flow problems and computational fluid dynamics (CFD). This experience includes the solution of unusual and difficult problems such as the prediction of the unsteady forces generated by passing vehicles, the generation of wind-noise, and the flow of blood in medical devices. Many of these problems are solved using Acusolve or our own proprietary software. Our focus in fluid mechanics is to provide our clients with solutions, including consulting analysis as well as software and support in a combination tailored to their needs. We can provide a complete solution or help staff obtain the tools and expertise to bring the solution process in-house. Below are some of our success stories.
Related Showcase Projects
| Design of Blood Handling Devices. CFD is an effective tool for the complex design problem of blood pumps. We first solved a complete blood pump design analysis for our client to demonstrate the use of CFD in design. We also developed a software module to predict the blood damage, an important design criteria. We then assisted the client in developing a continuing in-house CFD design capability combining both software and hardware. |
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| Wind generated noise. CFD solutions can be combined with acoustics techniques to predict wind noise at low Mach numbers. Our application of these techniques includes the prediction of the noise generated by train pantographs, automobile antennas, and similar structures. These techniques can be applied to a variety of structures and can be applied to fluid flow problems, such as ship propeller noise. |
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| Train Aerodynamic Interaction. Passing trains can generate strong aerodynamic forces. We have used CFD techniques to predict the dynamic forces for a high-speed train passing other rail cars. The aerodynamic loads are used to evaluate the risk of accidents, such as damage to commuter rail windows or dislodging freight containers. |
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| Passing Train Aerodynamic Measurement. Confidence in CFD models is greatly enhanced when they are validated against measured data. We had a unique opportunity to measure the aerodynamic pressures induced by passing high speed trains and used the data to validate our previously generated CFD model. |
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| Blood Pump Design Optimization. Computational tools can be used to optimize performance in blood pumps. We are using advanced CFD codes to calculate the flow of blood through pumps combined with blood damage models to predict hemolysis. The resulting tools can be used to evaluate and optimize a blood pump to both minimize blood damage and optimize pump performance. |
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| Airflow over a Train Entering a Tunnel. High-speed trains generate strong aerodynamic pressures as they enter a tunnel. The resulting forces can be important for the train dynamics during tunnel entry. In addition, the pressure change in the train interior must be maintained within passenger comfort levels. We have used CFD techniques to predict the dynamic forces for a high-speed train entering a tunnel. |
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Cooling of Electronics Packages. Good design of electronics packages requires accurate prediction of their thermal environment. We used the CFD code Acusolve to predict both natural and forced convection in electronics packages. Our expertise in package design also includes structural stress analysis and fatigue.
For inquiries or comments, please contact:
Robert MacNeill
Principal Engineer
e-mail: rmacneill@ara.com
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