The Models for the Local and Regional Scales Atmospheric Flows

1990 ◽  
pp. 295-378
Author(s):  
Radyadour Zeytounian
Keyword(s):  
Atmospheric Flows

Euler solutions for airfoils in inhomogeneous atmospheric flows

1999 ◽  
Author(s):  
Caroline Weishaeupl ◽  
Boris Laschka
Keyword(s):  
Atmospheric Flows

Hybrid lattice Boltzmann model for atmospheric flows under anelastic approximation

2021 ◽  
Vol 33 (3) ◽  
pp. 036607
Author(s):  
Y. Feng ◽  
J. Miranda-Fuentes ◽  
J. Jacob ◽  
P. Sagaut
Keyword(s):  
Lattice Boltzmann ◽  
Lattice Boltzmann Model ◽  
Atmospheric Flows ◽  
Boltzmann Model

CFD simulations of turbulent buoyant atmospheric flows over complex geometry: Solver development in OpenFOAM

2013 ◽  
Vol 82 ◽  
pp. 1-13 ◽  
Author(s):  
Federico Flores ◽  
René Garreaud ◽  
Ricardo C. Muñoz
Keyword(s):  
Complex Geometry ◽  
Cfd Simulations ◽  
Atmospheric Flows

scholarly journals Modelling atmospheric flows with adaptive moving meshes

2012 ◽  
Vol 231 (7) ◽  
pp. 2741-2763 ◽  
Author(s):  
Christian Kühnlein ◽  
Piotr K. Smolarkiewicz ◽  
Andreas Dörnbrack
Keyword(s):  
Moving Meshes ◽  
Atmospheric Flows

A Control-Volume Model of the Compressible Euler Equations with a Vertical Lagrangian Coordinate

2013 ◽  
Vol 141 (7) ◽  
pp. 2526-2544 ◽  
Author(s):  
Xi Chen ◽  
Natalia Andronova ◽  
Bram Van Leer ◽  
Joyce E. Penner ◽  
John P. Boyd ◽  
...  
Keyword(s):  
Euler Equations ◽  
Control Volume ◽  
Test Cases ◽  
Riemann Solver ◽  
New Approach ◽  
Vertical Coordinate ◽  
Low Mach Number ◽  
Atmospheric Flows ◽  
Lagrangian Coordinate ◽  
Control Volume Approach

Abstract Accurate and stable numerical discretization of the equations for the nonhydrostatic atmosphere is required, for example, to resolve interactions between clouds and aerosols in the atmosphere. Here the authors present a modification of the hydrostatic control-volume approach for solving the nonhydrostatic Euler equations with a Lagrangian vertical coordinate. A scheme with low numerical diffusion is achieved by introducing a low Mach number approximate Riemann solver (LMARS) for atmospheric flows. LMARS is a flexible way to ensure stability for finite-volume numerical schemes in both Eulerian and vertical Lagrangian configurations. This new approach is validated on test cases using a 2D (x–z) configuration.

scholarly journals Deterministic chaos, fractals, and quantumlike mechanics in atmospheric flows

1990 ◽  
Vol 68 (9) ◽  
pp. 831-841 ◽  
Author(s):  
A. Mary Selvam
Keyword(s):  
Long Range ◽  
Deterministic Chaos ◽  
Logarithmic Spiral ◽  
Quantum Mechanical ◽  
Energy Structure ◽  
Penrose Tiling ◽  
Atmospheric Flow ◽  
Closed Set ◽  
Atmospheric Flows ◽  
Temporal Correlations

The complex spatiotemporal patterns of atmospheric flows that result from the cooperative existence of fluctuations ranging in size from millimetres to thousands of kilometres are found to exhibit long-range spatial and temporal correlations. These correlations are manifested as the self-similar fractal geometry of the global cloud cover pattern and the inverse power-law form for the atmospheric eddy energy spectrum. Such long-range spatiotemporal correlations are ubiquitous in extended natural dynamical systems and are signatures of deterministic chaos or self-organized criticality. In this paper, a cell dynamical system model for atmospheric flows is developed by consideration of microscopic domain eddy dynamical processes. This nondeterministic model enables formulation of a simple closed set of governing equations for the prediction and description of observed atmospheric flow structure characteristics as follows. The strange-attractor design of the field of deterministic chaos in atmospheric flows consists of a nested continuum of logarithmic spiral circulations that trace out the quasi-periodic Penrose tiling pattern, identified as the quasi-crystalline structure in condensed matter physics. The atmospheric eddy energy structure follows laws similar to quantum mechanical laws. The apparent waveparticle duality that characterizes quantum mechanical laws is attributed to the bimodal phenomenological form of energy display in the bidirectional energy flow that is intrinsic to eddy circulations, e.g., formation of clouds in updrafts and dissipation of clouds in downdrafts that result in the observed discrete cellular geometry of cloud structure.

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