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Unsteady Reynolds averaged navier-stokes simulation of the post-critical flow around a closely spaced group of silos

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Abstract
During a storm in October 2002, wind induced ovalling oscillations were observed on several empty silos of a closely spaced group of 8 by 5 silos in the port of Antwerp (Belgium). Present day standards describe only basic wind load cases, unable to explain this ovalling phenomenon. In order to improve the design of engineering structures with cylinders placed in groups, a thorough understanding of the fluid flow around such groups is required. 2D unsteady Reynolds averaged Navier-Stokes (URANS) equations usingMenter’s shear stress transport turbulencemodel were performed, considering the wind flow around the rectangular group for a range of angles of incidence (0  a  90). The 2D highly turbulent post-critical flow (Re = 1.24×107) around a single cylinder was computed to elucidate the influence of the applied turbulence model and to validate the spatial and temporal discretization. Since, the flow regime around and within the silo group is similar to the flow around rectangular cylinders and the flow within tube arrays (e.g. heat exchangers), similarities and differences are used to assess the influence of the angle of incidence on the flow pattern around the cylinder group. The large velocities in the interstitial flow between cylinders as well as the formation of large scale vortex shedding in the wake of the group are discussed for various angles of incidence. Static and dynamic loadings on separate silos of the group are studied to explain the existence and the location of ovalling oscillations in closely spaced silo groups.
Keywords
Post-critical flow, Ovalling, Pressure coefficient, OVALLING OSCILLATIONS, CROSS-FLOW, Cylinder group, Circular cylinder, NUMBERS, CYLINDRICAL-SHELLS, CIRCULAR-CYLINDERS

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Citation

Please use this url to cite or link to this publication:

Chicago
Hillewaere, Jeroen, Joris Degroote, Jan Vierendeels, Guido De Roeck, and Geert Degrande. 2011. “Unsteady Reynolds Averaged Navier-stokes Simulation of the Post-critical Flow Around a Closely Spaced Group of Silos.” In EURODYN-International Conference on Structural Dynamics, ed. Guide De Roeck, G Degrande, G Lombaert, and G Müller, 1573–1580. Ghent, Belgium: Ghent University, Department of Mechanical construction and production.
APA
Hillewaere, J., Degroote, J., Vierendeels, J., De Roeck, G., & Degrande, G. (2011). Unsteady Reynolds averaged navier-stokes simulation of the post-critical flow around a closely spaced group of silos. In Guide De Roeck, G. Degrande, G. Lombaert, & G. Müller (Eds.), EURODYN-International Conference on Structural Dynamics (pp. 1573–1580). Presented at the 8th International Conference on Structural Dynamics (Eurodyn - 2011), Ghent, Belgium: Ghent University, Department of Mechanical construction and production.
Vancouver
1.
Hillewaere J, Degroote J, Vierendeels J, De Roeck G, Degrande G. Unsteady Reynolds averaged navier-stokes simulation of the post-critical flow around a closely spaced group of silos. In: De Roeck G, Degrande G, Lombaert G, Müller G, editors. EURODYN-International Conference on Structural Dynamics. Ghent, Belgium: Ghent University, Department of Mechanical construction and production; 2011. p. 1573–80.
MLA
Hillewaere, Jeroen, Joris Degroote, Jan Vierendeels, et al. “Unsteady Reynolds Averaged Navier-stokes Simulation of the Post-critical Flow Around a Closely Spaced Group of Silos.” EURODYN-International Conference on Structural Dynamics. Ed. Guide De Roeck et al. Ghent, Belgium: Ghent University, Department of Mechanical construction and production, 2011. 1573–1580. Print.
@inproceedings{2019845,
  abstract     = {During a storm in October 2002, wind induced ovalling oscillations were observed on several empty silos of a closely spaced group of 8 by 5 silos in the port of Antwerp (Belgium). Present day standards describe only basic wind load cases, unable to explain this ovalling phenomenon. In order to improve the design of engineering structures with cylinders placed in groups, a thorough understanding of the fluid flow around such groups is required. 2D unsteady Reynolds averaged Navier-Stokes (URANS) equations usingMenter{\textquoteright}s shear stress transport turbulencemodel were performed, considering the wind flow around the rectangular group for a range of angles of incidence (0\unmatched{000e} \unmatched{0014} a \unmatched{0014} 90\unmatched{000e}). The 2D highly turbulent post-critical flow (Re = 1.24{\texttimes}107) around a single cylinder was computed to elucidate the influence of the applied turbulence model and to validate the spatial and temporal discretization. Since, the flow regime around and within the silo group is similar to the flow around rectangular cylinders and the flow within tube arrays (e.g. heat exchangers), similarities and differences are used to assess the influence of the angle of incidence on the flow pattern around the cylinder group. The large velocities in the interstitial flow between cylinders as well as the formation of large scale vortex shedding in the wake of the group are discussed for various angles of incidence. Static and dynamic loadings
on separate silos of the group are studied to explain the existence and the location of ovalling oscillations in closely spaced silo groups.},
  author       = {Hillewaere, Jeroen and Degroote, Joris and Vierendeels, Jan and De Roeck, Guido and Degrande, Geert},
  booktitle    = {EURODYN-International Conference on Structural Dynamics},
  editor       = {De Roeck, Guide and Degrande, G and Lombaert, G and M{\"u}ller, G},
  isbn         = {9789076019314},
  issn         = {2311-9020},
  keyword      = {Post-critical flow,Ovalling,Pressure coefficient,OVALLING OSCILLATIONS,CROSS-FLOW,Cylinder group,Circular cylinder,NUMBERS,CYLINDRICAL-SHELLS,CIRCULAR-CYLINDERS},
  language     = {eng},
  location     = {Leuven, Belgium},
  pages        = {1573--1580},
  publisher    = {Ghent University, Department of Mechanical construction and production},
  title        = {Unsteady Reynolds averaged navier-stokes simulation of the post-critical flow around a closely spaced group of silos},
  year         = {2011},
}

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