Spectra and correlation functions of surface layer atmospheric turbulence in unstable thermal stratification

1991 ◽  
pp. 387-412 ◽  
Author(s):  
B. A. Kader ◽  
A. M. Yaglom
Keyword(s):  
Surface Layer ◽  
Atmospheric Turbulence ◽  
Correlation Functions ◽  
Thermal Stratification

Modeling of atmospheric turbulence in surface layer over desert based on meteorological parameters

2010 ◽  
Vol 22 (12) ◽  
pp. 2799-2802
Author(s):  
胡月宏 Hu Yuehong ◽  
强希文 Qiang Xiwen ◽  
冯建伟 Feng Jianwei ◽  
张志刚 Zhang Zhigang ◽  
韩燕 Han Yan ◽  
...  
Keyword(s):  
Surface Layer ◽  
Atmospheric Turbulence ◽  
Meteorological Parameters

scholarly journals Wind Influence on Miro-launcher Dynamics Model

2019 ◽  
Vol 304 ◽  
pp. 07014
Author(s):  
Teodor-Viorel Chelaru ◽  
Valentin Pana ◽  
Alexandru Iulian Onel ◽  
Tudorel-Petronel Afilipoae ◽  
Andrei Filip Cojocaru ◽  
...  
Keyword(s):  
Atmospheric Turbulence ◽  
Correlation Functions ◽  
Degrees Of Freedom ◽  
Dynamics Model ◽  
Six Degrees Of Freedom ◽  
Body Model ◽  
Rigid Body Model ◽  
Wind Influence ◽  
Three Stages ◽  
Flight Parameters

The paper presents aspects regarding wind influence in dynamics of the three stages micro-launcher. The work is focus on atmospheric turbulence, with dedicated linear model based on characteristics correlation functions, that can be attached to the rigid body model with six degrees of freedom. The results analyzed will be the flight parameters of the launcher, with the wind influence. The novelty of the paper consists in dedicated wind models developed and their implementation in six degrees of freedom micro-launcher model.

scholarly journals On the factors influencing surface-layer energy closure and their seasonal variability over the semi-arid Loess Plateau of Northwest China

2012 ◽  
Vol 16 (3) ◽  
pp. 893-910
Author(s):  
X. Xiao ◽  
H. C. Zuo ◽  
Q. D. Yang ◽  
S. J. Wang ◽  
L. J. Wang ◽  
...  
Keyword(s):  
Surface Layer ◽  
Energy Balance ◽  
Atmospheric Turbulence ◽  
Loess Plateau ◽  
Turbulence Intensity ◽  
Source Area ◽  
Northwest China ◽  
The Impact ◽  
Semi Arid

Abstract. The energy observed in the surface layer, when using eddy-covariance techniques to measure turbulent fluxes, is not balanced. Important progress has been made in recent years in identifying potential reasons for this lack of closure in the energy balance, but the problem is not yet resolved. In this paper, long-term data that include output of tower, radiation, surface turbulence flux and soil measurement collected from September 2006 to August 2010 in the Semi-Arid Climate Change and Environment Observatory, Lanzhou University, in the semi-arid Loess Plateau of Northwest China, were analysed, focusing on the seasonal characteristics of the surface energy and the factors that have impact on the energy balance closure (EBC). The analysis shows that (1) the long-term observations are successful; the interaction between the land and the atmosphere in semi-arid climates can be represented by the turbulent transport of energy. In addition, even though the residual is obvious, this suggests that the factors that impact the EBC are stable, and their seasonal variations are identical. The analysis also shows that (2) four factors have obvious impact on the EBC: the diverse schemes for surface soil heat flux, the flux contribution from the target source area, the low-frequency part of the turbulence spectra, and the strength of atmospheric turbulence motion. The impact of these four factors on the EBC are similar in all seasons. Lastly, the results indicate that (3) atmospheric turbulence intensity is a very important factor in terms of its impact on the EBC. The relative turbulence intensity, RIw, characterises the strength of atmospheric turbulence motion, and is found to exert a noticeable impact on the EBC; in all seasons, the EBC is increased when the relative turbulence intensity is enlarged.

Second-order moments of Schell-model beams with various correlation functions in atmospheric turbulence

2017 ◽  
Vol 42 (22) ◽  
pp. 4647 ◽  
Author(s):  
Guo Zheng ◽  
Jue Wang ◽  
Lin Wang ◽  
Muchun Zhou ◽  
Yu Xin ◽  
...  
Keyword(s):  
Atmospheric Turbulence ◽  
Correlation Functions ◽  
Second Order

Définition d'un site réel répondant aux conditions d'une simulation d'une couche superficielle de l'atmosphère

1990 ◽  
Vol 17 (4) ◽  
pp. 543-546
Author(s):  
P. R. Louchez ◽  
J. Druez
Keyword(s):  
Surface Layer ◽  
Wind Tunnel ◽  
Atmospheric Turbulence ◽  
Stationary State ◽  
Wind Pressure ◽  
Neutral Surface ◽  
Design Problems ◽  
Neutral Surface Layer ◽  
Definition Of

Given the difficulty of numerically modelling atmospheric turbulence, laboratory wind-tunnel simulations have been used to solve a variety of design problems involving pollution, wind pressure on structures, etc. Most often, a dry, homogeneous, stationary, barotropic, and neutral surface layer is assumed for the simulation. However, such an assumption severely limits the applicability of the findings. This paper presents a definition of a real site for solving the types of design problems mentioned. A simple numeric application is performed on a simulation of wind drag on a vehicle travelling in the countryside under particular stationary-state and thermic-neutrality conditions. [Journal translation]

Characteristics of atmospheric turbulence in the surface layer over Antarctica

1991 ◽  
Vol 57 (3) ◽  
pp. 207-217 ◽  
Author(s):  
P. K. Pasricha ◽  
R. Singh ◽  
S. K. Sarkar ◽  
H. N. Dutta ◽  
B. M. Reddy ◽  
...  
Keyword(s):  
Surface Layer ◽  
Atmospheric Turbulence

Laser Studies of Atmospheric Turbulence in the Surface Layer

1995 ◽  
Vol 24 (1) ◽  
pp. 1-14
Author(s):  
P. C. S. Devara ◽  
S. Sharma ◽  
P. E. Raj ◽  
G. Pandithurai
Keyword(s):  
Surface Layer ◽  
Atmospheric Turbulence
Sign in / Sign up

Export Citation Format

Share Document