2019
DOI: 10.1017/jfm.2019.707
|View full text |Cite
|
Sign up to set email alerts
|

Density effects on post-shock turbulence structure and dynamics

Abstract: Turbulence structure resulting from multi-fluid or multi-species, variable-density isotropic turbulence interaction with a Mach 2 shock is studied using turbulence-resolving shock-capturing simulations and Eulerian (grid) and Lagrangian (particle) methods. The complex roles density play in the modification of turbulence by the shock wave are identified. Statistical analyses of the velocity gradient tensor (VGT) show that the density variations significantly change the turbulence structure and flow topology. Sp… Show more

Help me understand this report
View preprint versions

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
2
1

Citation Types

0
18
0

Year Published

2021
2021
2023
2023

Publication Types

Select...
5
1

Relationship

2
4

Authors

Journals

citations
Cited by 21 publications
(18 citation statements)
references
References 43 publications
0
18
0
Order By: Relevance
“…Other recent studies have explored related topics in the context of SITI such as mixing of passive scalars (Boukharfane, Bouali & Mura 2018; Gao, Bermejo-Moreno & Larsson 2020), variable density and multi-fluid flows (Tian et al. 2017; Tian, Jaberi & Livescu 2019), reacting shock waves (Huete et al. 2017) and specialized studies on post-shock thermodynamic fluctuations (Sethuraman, Sinha & Larsson 2018; Sethuraman & Sinha 2020 a , b ), temperature–velocity correlations (Quadros, Sinha & Larsson 2016 a ) and turbulent energy flux (Quadros, Sinha & Larsson 2016 b ) to inform turbulence model development.…”
Section: Introductionmentioning
confidence: 99%
“…Other recent studies have explored related topics in the context of SITI such as mixing of passive scalars (Boukharfane, Bouali & Mura 2018; Gao, Bermejo-Moreno & Larsson 2020), variable density and multi-fluid flows (Tian et al. 2017; Tian, Jaberi & Livescu 2019), reacting shock waves (Huete et al. 2017) and specialized studies on post-shock thermodynamic fluctuations (Sethuraman, Sinha & Larsson 2018; Sethuraman & Sinha 2020 a , b ), temperature–velocity correlations (Quadros, Sinha & Larsson 2016 a ) and turbulent energy flux (Quadros, Sinha & Larsson 2016 b ) to inform turbulence model development.…”
Section: Introductionmentioning
confidence: 99%
“…At this level, it must emphasized that similar LEE can be readily derived for the invariants of the traceless VGT A * , as it is shown in Appendix A. The traceless VGT is indeed often considered to analyze non-reactive turbulent flows featuring compressibility and/or dilatational effects 29,30,46,51 . At this level, it must also be emphasized that some similarities are expected between the present reactive flows featuring local premixed flame fronts and other turbulent flows featuring sharp density variations, e.g., shock waves, detonations, or two-phase flows featuring mass transfer (evaporation).…”
Section: Current State Of Knowledge and Theoretical Backgroundmentioning
confidence: 97%
“…The present study is focused on the analysis of the influence of thermal expansion on the dynamics of the velocity gradient tensor (VGT) and associated flow topologies. The study of flow topology and dilatation effects is a topic of relevance to scalar mixing in turbulent flows [27][28][29][30] .…”
Section: Scalar Mixing and Turbulence-scalar Interactionsmentioning
confidence: 99%
See 1 more Smart Citation
“…The analysis has been performed using data extracted from Direct Numerical Simulation (DNS) corresponding to various fully developed turbulent flows, such as isotropic turbulence, turbulent boundary layer, mixing layers, and more complex flows, such as shock-turbulence interaction [e.g. [10][11][12][13][14][15][16][17][18][19]. To accurately represent Lagrangian dynamics of the VGT, reduced empirical models have been proposed to capture the important dynamics without solving the full Navier-Stokes equations.…”
Section: Introductionmentioning
confidence: 99%