Non-overlapping domain decomposition for near-wall turbulence modeling

2016 ◽  
Author(s):  
Sergey Utyuzhnikov
Keyword(s):  
Domain Decomposition ◽  
Turbulence Modeling ◽  
Wall Turbulence ◽  
Overlapping Domain Decomposition ◽  
Near Wall Turbulence ◽  
Near Wall

Near-Wall Turbulence Modeling Without Wall Distance

2004 ◽  
Author(s):  
M. M. Rahman ◽  
T. Siikonen
Keyword(s):  
Turbulence Modeling ◽  
Adverse Pressure Gradient ◽  
Wall Turbulence ◽  
Gradient Flows ◽  
Wall Function ◽  
Cross Diffusion ◽  
Near Wall Turbulence ◽  
Good Agreement ◽  
Flow Separation And Reattachment ◽  
Near Wall

A low-Reynolds number k-ε model is proposed in which the anisotropic production in near-wall regions is accounted for substantially by modifying the model constants Cε(1,2) and adding cross-diffusion terms in the ε equation. Hence, it reduces the kinetic energy and length scale magnitudes to improve prediction of adverse pressure gradient flows, involving flow separation and reattachment. Unlike the conventional k-ε model, it requires no wall function/distance parameter that bridges the near-wall integration. The model coefficients/functions depend nonlinearly on both the strain-rate and vorticity invariants. The model is validated against a few flow cases, yielding predictions in good agreement with the direct numerical simulation (DNS) and experimental data.

Mechanism of control of the near-wall turbulence using a micro-cavity array

2021 ◽  
Vol 33 (7) ◽  
pp. 075114
Author(s):  
S. S. Bhat ◽  
A. Silvestri ◽  
B. S. Cazzolato ◽  
M. Arjomandi
Keyword(s):  
Wall Turbulence ◽  
Micro Cavity ◽  
Near Wall Turbulence ◽  
Cavity Array ◽  
Near Wall
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