Tilting, Stretching, Pairing and Collapse of Vortex Structures in Confined Counter-Current Flow

1981 ◽  
Vol 103 (3) ◽  
pp. 466-470 ◽  
Author(s):  
J. A. C. Humphrey ◽  
S. Li
Keyword(s):  
Current Flow ◽  
Three Dimensional ◽  
Longitudinal Direction ◽  
Reacting Flows ◽  
Current Channel ◽  
Free Interface ◽  
Vortex Pairing ◽  
Chemically Reacting Flows ◽  
Chemically Reacting ◽  
Counter Current

Visualization observations are reported for the time evolving vortex structure at the interface of a counter-current channel flow. The results are primarily qualitative in nature, but show clearly the evolution of a two-dimensional saddle-point flow into a complex, three-dimensional, periodic vortex-pairing process. Generation, pairing and collapse of the flow structure at the free interface is attributed to tilting and stretching of transverse vorticity by the main flow in the longitudinal direction. It is suggested that the present flow configuration may prove of use for investigating mixing in chemically reacting flows due to entraining vortex motions.

Three-dimensional upwind, parabolized Navier-Stokes code for chemically reacting flows

10.2514/3.261 ◽  
1991 ◽  
Vol 5 (3) ◽  
pp. 274-283 ◽  
Author(s):  
Philip E. Buelow ◽  
John C. Tannehill ◽  
John O. levalts ◽  
Scott L. Lawrence
Keyword(s):  
Three Dimensional ◽  
Reacting Flows ◽  
Navier Stokes ◽  
Chemically Reacting Flows ◽  
Chemically Reacting

Upwind parabolized Navier-Stokes code for chemically reacting flows

10.2514/3.157 ◽  
1990 ◽  
Vol 4 (2) ◽  
pp. 149-156 ◽  
Author(s):  
John C. Tannehill ◽  
John O. Ievalts ◽  
Philip E. Buelow ◽  
Dinesh K. Prabhu ◽  
Scott L. Lawrence
Keyword(s):  
Reacting Flows ◽  
Navier Stokes ◽  
Chemically Reacting Flows ◽  
Chemically Reacting

Numerical Simulation of Heat Transfer and Fluid Dynamics in Supersonic Chemically Reacting Flows

2010 ◽  
Author(s):  
Alexander M. Molchanov ◽  
Anna A. Arsentyeva
Keyword(s):  
Heat Transfer ◽  
Fluid Dynamics ◽  
High Speed ◽  
Stokes Equations ◽  
Order Approximation ◽  
Reacting Flows ◽  
Supersonic Combustion ◽  
Special Method ◽  
Chemically Reacting Flows ◽  
Chemically Reacting

An implicit fully coupled numerical method for modeling of chemically reacting flows is presented. Favre averaged Navier-Stokes equations of multi-component gas mixture with nonequilibrium chemical reactions using Arrhenius chemistry are applied. A special method of splitting convective fluxes is introduced. This method allows for using spatially second-order approximation in the main flow region and of first-order approximation in regions with discontinuities. To consider the effects of high-speed compressibility on turbulence the author suggests a correction for the model, which is linearly dependent on Mach turbulent number. For the validation of the code the described numerical procedures are applied to a series of flow and heat and mass transfer problems. These include supersonic combustion of hydrogen in a vitiated air, chemically reacting flow through fluid rocket nozzle, afterburning of fluid and solid rocket plumes, fluid dynamics and convective heat transfer in convergent-divergent nozzle. Comparison of the simulation with available experimental data showed a good agreement for the above problems.

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