Turbulence in vegetated flows: Volume-average analysis and modelling aspects

• Autorzy: Souliotis D. , Prinos P.
• Języki publikacji: EN

Abstrakty

EN

Two approaches for the modelling of turbulence in vegetated flows have been developed in the past. The “microscopic” approach which is straightforward but limited to simple cases and the “macroscopic” approach which is based on Volume Average Theory (VAT). In this study, aspects of Volume-Average (VA) analysis and modelling are investigated for turbulent vegetated flow using computed three-dimensional results from the solution of the Reynolds-Averaged Navier-Stokes (RANS) equations around a representative vegetal element. In particular (a) the VA transport equations for k and ?, based on VAT, are properly derived, (b) the Boussinesq hypothesis for the VA quantities, employed in -<ε> turbulence models is tested, and (c) the values of the coefficients used in such turbulence models are assessed in comparison with those used in the classical turbulence models.

Słowa kluczowe

EN

turbulence; VA analysis; vegetation

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2008
• Tom: Vol. 56, no. 3
• Strony: 894--917
• Opis fizyczny: bibliogr. 27 poz.

Twórcy

autor

Souliotis D.

autor

Prinos P.

• Hydraulics Laboratory, Department of Civil Engineering, Aristotle University of Thessaloniki, Thessaloniki, Greece,

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