Influence of Spanwise Domain on the Large Eddy Simulation of an Idealised Mixing Layer

2014 ◽  
Author(s):  
William A. McMullan
Keyword(s):  
Large Eddy Simulation ◽  
Mixing Layer ◽  
Eddy Simulation ◽  
Large Eddy

Numerical Simulation of the Supersonic Planar Mixing Layer

2011 ◽  
Vol 347-353 ◽  
pp. 922-926
Author(s):  
Jin Liang Gu ◽  
Huan Hao Zhang ◽  
Zhi Hua Chen ◽  
Xiao Hai Jiang
Keyword(s):  
Numerical Simulation ◽  
Mach Number ◽  
Large Eddy Simulation ◽  
Engineering Design ◽  
Mixing Layer ◽  
Eddy Simulation ◽  
Layer Structures ◽  
Eddy Characteristics ◽  
Large Eddy ◽  
Convective Mach Number

Large eddy simulation (LES) has been used to simulate both non-reacting and reacting supersonic planar mixing layers at convective Mach number Mc=0.3. The different eddy characteristics of two cases have been visualized and discussed based on our calculated results, and the differences of mixing layer structures have also been shown, which can provide some important guide for future relative engineering design.

scholarly journals Large Eddy Simulation and Dynamic Mode Decomposition of Turbulent Mixing Layers

2021 ◽  
Vol 11 (24) ◽  
pp. 12127
Author(s):  
Yuwei Cheng ◽  
Qian Chen
Keyword(s):  
Large Eddy Simulation ◽  
Turbulent Mixing ◽  
Mixing Layer ◽  
Mixing Layers ◽  
Dynamic Mode Decomposition ◽  
Dynamic Mode ◽  
Random Disturbance ◽  
Eddy Simulation ◽  
Mode Decomposition ◽  
Large Eddy

Turbulent mixing layers are canonical flow in nature and engineering, and deserve comprehensive studies under various conditions using different methods. In this paper, turbulent mixing layers are investigated using large eddy simulation and dynamic mode decomposition. The accuracy of the computations is verified and validated. Standard dynamic mode decomposition is utilized to flow decomposition, reconstruction and prediction. It was found that the dominant-mode selection criterion based on mode amplitude is more suitable for turbulent mixing layer flow compared with the other three criteria based on singular value, modal energy and integral modal amplitude, respectively. For the mixing layer with random disturbance, the standard dynamic mode decomposition method could accurately reconstruct and predict the region before instability happens, but is not qualified in the regions after that, which implies that improved dynamic mode decomposition methods need to be utilized or developed for the future dynamic mode decomposition of turbulent mixing layers.

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