scholarly journals Nonlinear interactions isolated through scale synthesis in experimental wall turbulence

2016 ◽  
Vol 1 (3) ◽  
Author(s):  
Subrahmanyam Duvvuri ◽  
Beverley McKeon
Keyword(s):  
Wall Turbulence ◽  
Nonlinear Interactions

Near Wall Turbulence Effects on Particle Transport and Deposition in Human Tracheobronchial Multi-Level Bifurcation Model

2015 ◽  
Author(s):  
Amir A. Mofakham ◽  
Lin Tian ◽  
Goodarz Ahmadi
Keyword(s):  
Boundary Conditions ◽  
Particle Deposition ◽  
Flow Simulation ◽  
Tracheobronchial Tree ◽  
Lung Model ◽  
Wall Turbulence ◽  
Nano Particles ◽  
Turbulent Regime ◽  
Computationally Efficient ◽  
Multi Level

Transport and deposition of micro and nano-particles in the upper tracheobronchial tree were analyzed using a multi-level asymmetric lung bifurcation model. The multi-level lung model is flexible and computationally efficient by fusing sequence of individual bifurcations with proper boundary conditions. Trachea and the first two generations of the tracheobronchial airway were included in the analysis. In these regions, the airflow is in turbulent regime due to the disturbances induced by the laryngeal jet. Anisotropic Reynolds stress transport turbulence model (RSTM) was used for mean the flow simulation, together with the enhanced two-layer model boundary conditions. Particular attention is given to evaluate the importance of the “quadratic variation of the turbulent fluctuations perpendicular to the wall” on particle deposition in the upper tracheobroncial airways.

scholarly journals Actuation response model from sparse data for wall turbulence drag reduction

2020 ◽  
Vol 5 (7) ◽  
Author(s):  
Daniel Fernex ◽  
Richard Semaan ◽  
Marian Albers ◽  
Pascal S. Meysonnat ◽  
Wolfgang Schröder ◽  
...  
Keyword(s):  
Drag Reduction ◽  
Sparse Data ◽  
Wall Turbulence ◽  
Response Model

scholarly journals Nonlinear interactions in a hypersonic boundary layer

AIP Advances ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 035104
Author(s):  
Chuanhong Zhang ◽  
Zhiwei Shi
Keyword(s):  
Boundary Layer ◽  
Hypersonic Boundary Layer ◽  
Nonlinear Interactions

scholarly journals Spectral-scaling-based extension to the attached eddy model of wall turbulence

2020 ◽  
Vol 5 (10) ◽  
Author(s):  
Dileep Chandran ◽  
Jason P. Monty ◽  
Ivan Marusic
Keyword(s):  
Wall Turbulence
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