Estimation of the ratio between the Lagrangian and Eulerian time scales in the Atmospheric Boundary Layer by Large Eddy Simulation (Articolo in rivista)

Type

• Articolo in rivista (Classe)
• Prodotto della ricerca (Classe)

Label

• Estimation of the ratio between the Lagrangian and Eulerian time scales in the Atmospheric Boundary Layer by Large Eddy Simulation (Articolo in rivista) (literal)

Anno

• 2006-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1016/j.atmosenv.2005.09.041 (literal)

Alternative label

• Anfossi, C. Mangia, U. Rizza, G. Degrazia, E. Pereira Marques Filho (2006)
  Estimation of the ratio between the Lagrangian and Eulerian time scales in the Atmospheric Boundary Layer by Large Eddy Simulation
  in Atmospheric environment (1994)
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Anfossi, C. Mangia, U. Rizza, G. Degrazia, E. Pereira Marques Filho (literal)

Pagina inizio

• 326 (literal)

Pagina fine

• 337,00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

• http://www.sciencedirect.com/science/article/pii/S1352231005008873 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 40 (literal)

Rivista

• Atmospheric environment (Rivista)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• ISAC CNR (literal)

Titolo

• Estimation of the ratio between the Lagrangian and Eulerian time scales in the Atmospheric Boundary Layer by Large Eddy Simulation (literal)

Abstract

• The estimation of the ratio?=TL/TE between Lagrangian and Euleriantimescales is an important problem, both in basic turbulence theory and in atmospheric pollution dispersion studies. The present paper aims at contributing to this research field by examining planetary boundarylayer (PBL) turbulence data generated by an LES model in strongly convective, buoyancy-dominated and neutral stability conditions, respectively. Standard deviations of wind velocity, integral timescales, autocorrelation functions and spectra, for the three wind components, both in the Lagrangian and Eulerian frames, have been calculated. The Hay and Pasquill hypothesis which says that, at a first approximation, Eulerian and Lagrangian autocorrelation functions and spectra are identical after rescaling of the time axis by a factor ?, was verified for the lower time lags of autocorrelation functions, and for frequencies describing the energy-containing eddies. Also. the usual assumption that ? is inversely proportional to the turbulence intensity i, i.e. ?=?/i, was verified. Other four relationships, all relating ? and i were tested, finding that all could be confidently used in practical applications. It was found that ? is a function of the different turbulent regimes, being greater in the strongly convective PBL, than in the neutral one. Values found are in agreement with previous experimental results and theoretical evaluations. (literal)

Prodotto di

• Institute of atmospheric sciences and climate (ISAC) (Istituto)
• Processi in atmosfera (TA.P06.017.001) (Modulo)

Autore CNR

• UMBERTO RIZZA (Unità di personale interno)
• DOMENICO ANFOSSI (Persona)
• CRISTINA MANGIA (Persona)

Incoming links:

Prodotto

• Institute of atmospheric sciences and climate (ISAC) (Istituto)
• Processi in atmosfera (TA.P06.017.001) (Modulo)

Autore CNR di

• CRISTINA MANGIA (Persona)
• UMBERTO RIZZA (Unità di personale interno)
• DOMENICO ANFOSSI (Persona)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Atmospheric environment (Rivista)