An alternative scaling for unsteady penetrative free convection

Catalano, Franco; Moroni, Monica; Dore, Valentina; Cenedese, A.

doi:10.1029/2012jd018229

Cited by 9 publications

(3 citation statements)

References 87 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where 𝜎 𝑢 stands for the standard deviation of velocity. This parameter can be provided by diagnostic tools, RANS codes (e.g., [32][33][34][35]), or LES models, which allow a detailed characterization of the turbulent structure of the atmospheric boundary layer (e.g., [36][37][38]).…”

Section: Parameterizations Of the Dissipation Rate Of The Concentrationmentioning

confidence: 99%

See 1 more Smart Citation

Analytical Solutions of the Balance Equation for the Scalar Variance in One-Dimensional Turbulent Flows under Stationary Conditions

Amicarelli

Bernardino

Catalano

et al. 2015

Advances in Mathematical Physics

Self Cite

View full text Add to dashboard Cite

This study presents 1D analytical solutions for the ensemble variance of reactive scalars in one-dimensional turbulent flows, in case of stationary conditions, homogeneous mean scalar gradient and turbulence, Dirichlet boundary conditions, and first order kinetics reactions. Simplified solutions and sensitivity analysis are also discussed. These solutions represent both analytical tools for preliminary estimations of the concentration variance and upwind spatial reconstruction schemes for CFD (Computational Fluid Dynamics)—RANS (Reynolds-Averaged Navier-Stokes) codes, which estimate the turbulent fluctuations of reactive scalars.

show abstract

Section: Parameterizations Of the Dissipation Rate Of The Concentrationmentioning

confidence: 99%

“…Finally, considering (38), as explained in the following section, the uniform time-dependent solution for the concentration variance becomes…”

Section: D Analytical Solution Ofmentioning

confidence: 99%

Analytical Solutions of the Balance Equation for the Scalar Variance in One-Dimensional Turbulent Flows under Stationary Conditions

Amicarelli

Bernardino

Catalano

et al. 2015

Advances in Mathematical Physics

Self Cite

View full text Add to dashboard Cite

show abstract

“…The temperature of the sidewalls is not controlled but can be reasonably considered constant throughout the experiment. Pollen particles of about 80 m mean diameter, assuming the same density as the seeded liquid [26][27][28], are used as neutrally buoyant passive tracer to reconstruct particle trajectories. The test section is illuminated through a planar light sheet obtained through a laser or a high power lamp.…”

mentioning

confidence: 99%

Laboratory Simulations of Local Winds in the Atmospheric Boundary Layer via Image Analysis

Moroni

Cenedese

2015

Advances in Meteorology

Self Cite

View full text Add to dashboard Cite

In the atmospheric boundary layer, under high pressure conditions and negligible geostrophic winds, problems associated with pollution are the most critical. In this situation local winds play a major role in the evaluation of the atmospheric dynamics at small scales and in dispersion processes. These winds originate as a result of nonuniform heating of the soil, either when it is homogeneous or in discontinuous terrain in the presence of sea and/or slopes. Depending on the source of the thermal gradient, local winds are classified into convective boundary layer, sea and land breezes, urban heat islands, and slope currents. Local winds have been analyzed by (i) simple analytical models; (ii) numerical models; (iii) field measurements; (iv) laboratory measurements through which it is impossible to completely create the necessary similarities, but the parameters that determine the phenomenon can be controlled and each single wind can be separately analyzed. The present paper presents a summary of laboratory simulations of local winds neglecting synoptic winds and the effects of Coriolis force. Image analysis techniques appear suitable to fully describe both the individual phenomenon and the superposition of more than one local wind. Results do agree with other laboratory studies and numerical experiments.

show abstract

Numerical and Experimental Simulations of Local Winds

Catalano

Cenedese

Falasca

et al. 2011

NATO Science for Peace and Security Series C: Environmental Security

View full text Add to dashboard Cite

Local circulation dynamics have a strong impact on the climate evolution as they contribute to the redistribution of energy and scalars from the regional to the global scale. Mesoscale phenomena are driven by surface heat, momentum and moisture fluxes; the intensity and distribution of these forcings can be significantly modified by the urbanization. The present work describes numerical and experimental investigations of the flow over an urban area. The circulation arises from the temperature difference between the city and the suburbs, called the Urban Heat Island (UHI) phenomenon. The three-dimensional non-hydrostatic meteorological model WRF has been used to perform Large Eddy Simulations of the UHI flow and its evolution during the complete day-night cycle. The domain is assumed to be planar in the cross-flow direction and periodic lateral boundary conditions are imposed. The laboratory experiments are conducted in a thermally controlled water tank to simulate an initially stably stratified environment and an electric heater solidal with the bottom of the tank mimics the urban site. Image analysis techniques have been used to reconstruct the velocity fields, while temperatures are acquired by multiple thermocouple arrays. The high resolution of both the numerical and laboratory experiments allows a detailed characterization of both mean and turbulent properties of the UHI circulation. Present numerical and laboratory results, normalized by similarity theory scaling parameters, compare well with literature data. © Springer Science+Business Media B.V. 2012

show abstract

An alternative scaling for unsteady penetrative free convection

Cited by 9 publications

References 87 publications

Analytical Solutions of the Balance Equation for the Scalar Variance in One-Dimensional Turbulent Flows under Stationary Conditions

Analytical Solutions of the Balance Equation for the Scalar Variance in One-Dimensional Turbulent Flows under Stationary Conditions

Laboratory Simulations of Local Winds in the Atmospheric Boundary Layer via Image Analysis

Numerical and Experimental Simulations of Local Winds

Contact Info

Product

Resources

About