# Diurnal evolution of an atmospheric boundary layer

Authors: Clarke et al.

Type: Experimental

Status:

Description

## Description

The objective of this case study is to validate the ability of the atmospheric module of Code_Saturne to simulate the diurnal evolution of an horizontally homogeneous atmospheric boundary layer, with thermal and radiative forcing. For this purpose, we simulate the day 33 and the night 33/34 of the Wangara experiment, which was conducted during July and August 1967 in Australia and provides boundary layer data over an homogeneous flat terrain (Clarke et al. 1971).

## Flow Parameters

The domain is an horizontally periodic column domain of 2 km high.

Fluid properties:

• reference density : %$1.23 kg.m^{-3}$%
• dynamic viscosity : %$1.6 \times 10^{-5} kg.m^{-1}.s^{-1}$%
• reference velocity : %$10 m.s^{-1}$%
• specific heat capacity : %$1004 J.K^{-1}.kg^{-1}$%
• reference pressure : %$101300 Pa$%

## Reference Publications

1. Clarke R.H., Dyer A.J., Brook R.R., Reid D.G. and Troup A.J., 'The Wangara experiment - Boundary layer data', Paper n° 19, Division Meteorological Physics, CSIRO, Australia, 1971.
2. Duynkerke P.G., 'An application of the %$k-\epsilon$% turbulence closure model to the neutral and stable atmospheric boundary layer', J.Atm.Sci., vol. 45, pp. 865-880, 1988.
3. Louis J.F., Tiedtke M., Geleyn J.F., 'A short history of the PBL parametrization at ECMWF', Proceedings, ECMWF workshop on planetary boundary layer parametrization, Reading, pp. 59-80, 1982.
4. Musson-Genon L., 'Forecasting in the vertical with a local dynamical interpretation method', Mon. Wea. Rev., 117, pp. 29-39, 1989.
5. Yamada, T. and Mellor G., 'A simulation of the Wangara atmospheric boundary layer data', J. Atmos. Sci., 32, pp. 2309-2329, 1975.
6. Wyngaard, J.C. and Coté O.R., 'The evolution of a convective planetary boundary layer. A higher-order closure model study', Bound. Layer Meteor., 7, pp. 289-308, 1974.

## Results

Simulation results available for this case:
Code Version Author Restrictions
Code_Saturne 2.0-rc2 M. Milliez AccessEDFGroup
Number of topics: 1

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Topic revision: r24 - 2017-05-19 - 03:37:30 - AllenZhang
CfdTm Web
23 Aug 2019

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