A Priori Direct Numerical Simulation Assessment of Algebraic Models of Variances and Dissipation Rates in the Context of Reynolds-Averaged Navier-Stokes Simulations for Low Damköhler Number Partially Premixed Combustion

2010 ◽  
Vol 182 (8) ◽  
pp. 960-999 ◽  
Author(s):  
Sean P. Malkeson ◽  
Nilanjan Chakraborty
Keyword(s):  
Numerical Simulation ◽  
Direct Numerical Simulation ◽  
A Priori ◽  
Premixed Combustion ◽  
Navier Stokes ◽  
Algebraic Models ◽  
Dissipation Rates ◽  
Partially Premixed Combustion ◽  
Partially Premixed ◽  
Reynolds Averaged Navier Stokes

scholarly journals Numerical investigation of particles turbulent dispersion in channel flow

2012 ◽  
Vol 16 (5) ◽  
pp. 1510-1514
Author(s):  
Tian Li ◽  
Li-Hao Zhao ◽  
Xiao-Ke Ku ◽  
Helge Andersson ◽  
Terese Lovas
Keyword(s):  
Numerical Simulation ◽  
Direct Numerical Simulation ◽  
Numerical Investigation ◽  
Channel Flow ◽  
Particle Distribution ◽  
Turbulent Dispersion ◽  
Wall Turbulence ◽  
Navier Stokes ◽  
Reynolds Averaged Navier Stokes ◽  
Over Time

This paper investigates the performance of Reynolds-averaged Navier-Stokes model on dispersion of particles in wall turbulence. A direct numerical simulation of wall-bounded channel flow with particles suspensions was set as a benchmark. The standard k-? model coupled with two different eddy interaction models was used in Reynolds-averaged Navier-Stokes model and compared to the direct numerical simulation. Detailed comparisons between direct numerical simulation and Reynolds-averaged Navier-Stokes model on particle distribution evolving over time were carried out.

Numerical simulation of combustion and soot under partially premixed combustion of low-octane gasoline

Fuel ◽  
2018 ◽  
Vol 211 ◽  
pp. 420-431 ◽  
Author(s):  
Yanzhao An ◽  
Mohammed Jaasim ◽  
R. Vallinayagam ◽  
S. Vedharaj ◽  
Hong G. Im ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Premixed Combustion ◽  
Partially Premixed Combustion ◽  
Partially Premixed

Partially-Averaged Navier-Stokes Model for Turbulence: A Reynolds-Averaged Navier-Stokes to Direct Numerical Simulation Bridging Method

2005 ◽  
Vol 73 (3) ◽  
pp. 413-421 ◽  
Author(s):  
Sharath S. Girimaji
Keyword(s):  
Numerical Simulation ◽  
Direct Numerical Simulation ◽  
Navier Stokes ◽  
Control Parameters ◽  
Closure Model ◽  
Filter Width ◽  
Model Filter ◽  
Reynolds Averaged Navier Stokes ◽  
Model Equations ◽  
Two Parameters

A turbulence bridging method purported for any filter-width or scale resolution—fully averaged to completely resolved—is developed. The method is given the name partially averaged Navier-Stokes (PANS) method. In PANS, the model filter width (extent of partial averaging) is controlled through two parameters: the unresolved-to-total ratios of kinetic energy (fk) and dissipation (fε). The PANS closure model is derived formally from the Reynolds-averaged Navier-Stokes (RANS) model equations by addressing the following question: if RANS represents the closure for fully averaged statistics, what is the corresponding closure for partially averaged statistics? The PANS equations vary smoothly from RANS equations to Navier-Stokes (direct numerical simulation) equations, depending on the values of the filter-width control parameters. Preliminary results are very encouraging.

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