Numerical solutions for atmospheric boundary layer flows over street canyons

2005 ◽  
pp. 319-325 ◽  
Author(s):  
R. Piva ◽  
P. Orlandi
Keyword(s):  
Boundary Layer ◽  
Atmospheric Boundary Layer ◽  
Numerical Solutions ◽  
Boundary Layer Flows ◽  
Street Canyons

Combined Convection–Conduction–Radiation Boundary Layer Flows Using Optimal Control Penalty Finite Elements

1989 ◽  
Vol 111 (2) ◽  
pp. 433-437 ◽  
Author(s):  
L. R. Utreja ◽  
T. J. Chung
Keyword(s):  
Boundary Layer ◽  
Optimal Control ◽  
Finite Elements ◽  
Optical Thickness ◽  
Energy Equation ◽  
Numerical Solutions ◽  
Boundary Layer Flows ◽  
Combined Convection ◽  
Radiation Boundary ◽  
Plate Geometry

Numerical solutions for combined convection and radiation in a laminar boundary layer on an isothermal wall are obtained using optimal control penalty (OCP) finite elements. The integro-differential energy equation is solved without any limitation of optical thickness. The expression for the divergence of radiation flux containing integral terms is written in terms of a one-dimensional radiation field for a flat plate geometry. The radiation interaction effect on the temperature distribution in the boundary layer is described. The solution of the integro-differential energy equation is then compared with known solutions in the limits of optical thickness.

Laboratory simulation of rotating atmospheric boundary layer flows over obstacles

1983 ◽  
Vol 6 (4) ◽  
pp. 401-428 ◽  
Author(s):  
S. Alessio ◽  
L. Briatore ◽  
A. Longhetto ◽  
G. Chabert D'Hières ◽  
H. Didelle
Keyword(s):  
Boundary Layer ◽  
Atmospheric Boundary Layer ◽  
Laboratory Simulation ◽  
Boundary Layer Flows

Singularities in solutions of the three-dimensional laminar-boundary-layer equations

1985 ◽  
Vol 160 ◽  
pp. 257-279 ◽  
Author(s):  
James C. Williams
Keyword(s):  
Boundary Layer ◽  
Laminar Boundary Layer ◽  
Numerical Solutions ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Unsteady Boundary Layer ◽  
Boundary Layer Flows ◽  
Boundary Layer Equations ◽  
New Type ◽  
Steady Laminar

The three-dimensional steady laminar-boundary-layer equations have been cast in the appropriate form for semisimilar solutions, and it is shown that in this form they have the same structure as the semisimilar form of the two-dimensional unsteady laminar-boundary-layer equations. This similarity suggests that there may be a new type of singularity in solutions to the three-dimensional equations: a singularity that is the counterpart of the Stewartson singularity in certain solutions to the unsteady boundary-layer equations.A family of simple three-dimensional laminar boundary-layer flows has been devised and numerical solutions for the development of these flows have been obtained in an effort to discover and investigate the new singularity. The numerical results do indeed indicate the existence of such a singularity. A study of the flow approaching the singularity indicates that the singularity is associated with the domain of influence of the flow for given initial (upstream) conditions as is prescribed by the Raetz influence principle.

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