Wind and Structures

Techno-Press (테크노프레스)
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Bluff body asymmetric flow phenomenon - real effect or solver artefact?

  • Published : 2002.04.25
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Abstract

This paper describes a CFD investigation into the flow over the cab of a bluff-fronted lorry. Several different simulations were undertaken, using the commercial codes: CFX, Fluent and PowerFLOW. Using the $k-{\varepsilon}$ turbulence model, the flow over the cab was symmetric, however, using more accurate turbulence models such as the RNG $k-{\varepsilon}$ model or the Reynolds Stress Model, the flow was asymmetric. The paper discusses whether this phenomenon is a real effect or whether it is a solver artefact and the study is supported by experimental evidence. The findings are preliminary, but suggest that it has a physical origin and that it may be aspect ratio-dependent.

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References

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Cited by

  1. Research on wind barrier of canyon bridge-tunnel junction based on wind characteristics vol.24, pp.5, 2002, https://doi.org/10.1177/1369433220971730