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Development of an analytical Lagrangian model for passive scalar dispersion in low-wind speed meandering conditions

Author

Listed:
  • Stefanello, M.B.
  • Degrazia, G.A.
  • Mortarini, L.
  • Buligon, L.
  • Maldaner, S.
  • Carvalho, J.C.
  • Acevedo, O.C.
  • Martins, L.G.N.
  • Anfossi, D.
  • Buriol, C.
  • Roberti, D.

Abstract

Describing the effects of wind meandering motions on the dispersion of scalars is a challenging task, since this type of flow represents a physical state characterized by multiple scales. In this study, a Lagrangian stochastic diffusion model is derived to describe scalar transport during the horizontal wind meandering phenomenon that occurs within a planetary boundary layer. The model is derived from the linearization of the Langevin equation, and it employs a heuristic functional form that represents the autocorrelation function of meandering motion. The new solutions, which describe the longitudinal and lateral wind components, were used to simulate tracer experiments that were performed in low-wind speed conditions. The results of the comparison indicate that the new model can effectively reproduce the observed concentrations of the contaminants, and therefore, it can satisfactorily describe enhanced dispersion effects due to the presence of meandering.

Suggested Citation

  • Stefanello, M.B. & Degrazia, G.A. & Mortarini, L. & Buligon, L. & Maldaner, S. & Carvalho, J.C. & Acevedo, O.C. & Martins, L.G.N. & Anfossi, D. & Buriol, C. & Roberti, D., 2018. "Development of an analytical Lagrangian model for passive scalar dispersion in low-wind speed meandering conditions," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 492(C), pages 1007-1015.
    • Handle: RePEc:eee:phsmap:v:492:y:2018:i:c:p:1007-1015
    DOI: 10.1016/j.physa.2017.11.031
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    Cited by:

    1. Razavi Dehkordi, Mohammad Hossein & Soltani, Mohammad Reza & Davari, Ali Reza, 2019. "Statistical analysis on the effect of reduced frequency on the aerodynamic behavior of an airfoil in dynamic physical motions," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 535(C).

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