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- El-khoury, Jad, 1975-, et al.
(author)
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A Roadmap Towards Integrated CPS Development Environments
- 2013
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Conference paper (peer-reviewed)abstract
- Cyber Physical System (CPS) development is highly heterogeneous, involving many stakeholders, each of which interacts with its development artifacts through a variety of tools, and within several engineering processes. Successful CPS development requires these tools to be well-integrated into a Development Environment (DE) in order to support its many stakeholders and processes. In this paper we identify the main challenges facing DE development for CPSs, and presents a roadmap to meet these challenges. We here take the position that focus should be redirected from trying to achieve a single, one-size-fits-all solution to such a heterogeneous problem. Instead, focus should be placed on supporting the development of highly-customized DEs, which readily can be applied to industrial development. Such a highly-customized DE should fit the needs of a particular development organization, while at the same time taking advantage of relevant standardization efforts.
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| 4. |
- Vinuesa, Ricardo, et al.
(author)
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Direct numerical simulations of variable-aspect-ratio turbulent duct flows at low to moderate reynolds numbers
- 2013
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In: International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013. - : TSFP-8. - 9780000000002
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Conference paper (peer-reviewed)abstract
- Three-dimensional effects in turbulent duct flows, i.e., side-wall boundary layers and secondary motions, are studied by means of direct numerical simulations (DNS). The spectral element code Nek5000 is used to compute turbulent duct flows with aspect ratios 1 to 7 (at Reb, c = 2800, Reτ 180) and 1 (at Reb, c = 5600, Reτ 330) in streamwiseperiodic boxes of length 25h. The total number of grid points ranges from 28 to 145 million, and the fluid kinematic viscosity n was adjusted iteratively in order to keep the same bulk Reynolds number at the centerplane with changing aspect ratio. Spanwise variations in wall shear, mean-flow profiles and turbulence statistics are analyzed with aspect ratio, and also compared with the 2D channel. These computations show good agreement with experimental measurements carried out at IIT in parallel, and reinforces one important conclusion: the conditions obtained in the core region of a high-aspect-ratio duct cannot exactly be reproduced by spanwise-periodic DNSs of turbulent channel flows.
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