What question did this study set out to answer?

Investigate the dynamics and scaling properties of stationary, homogeneous shear-driven turbulence across a spectrum of stratifications ranging from neutral to strongly stable.

March 1, 2012Journal of Fluid Mechanics

Direct numerical simulation of stationary homogeneous stratified sheared turbulence

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Authors

DCDaniel ChungThe University of Melbourne GMGeorgios MatheouUniversity of Connecticut

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Implication

Numerical simulation reveals confinement-scale alignment in stratified sheared flows, indicating that Monin–Obukhov similarity theory governs vertical diapycnal diffusivity.

Key Points

Investigate the dynamics and scaling properties of stationary, homogeneous shear-driven turbulence across a spectrum of stratifications ranging from neutral to strongly stable.
Conducted direct numerical simulations while throttling mean shear to preserve constant net turbulence production over time independent of initial conditions.
Validated the throttling methodology against experimental spectra in neutrally stratified flow.
Subtracted horizontal mean profiles to eliminate vertically sheared large-scale horizontal motions and accounted for the periodic box confinement scale.
Identifying domain confinement scales allows horizontal spectra, flux–gradient relationships, and length scales to quantitatively align with Monin–Obukhov similarity theory.
The similarity-theory framework successfully accounts for and predicts the scaling of vertical diapycnal diffusivity across varying stratification regimes.

Cite This Study

Chung et al. (2012) studied this question.

synapsesocial.com/papers/6aaa46e7ee48c9e7f957be9c https://doi.org/10.1017/jfm.2012.59

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Implication

Numerical simulation reveals confinement-scale alignment in stratified sheared flows, indicating that Monin–Obukhov similarity theory governs vertical diapycnal diffusivity.

Direct numerical simulation of stationary homogeneous stratified sheared turbulence

Discussion

Member takes

Implication

Key Points

Cite This Study

Direct numerical simulation of stationary homogeneous stratified sheared turbulence

Discussion

Member takes

Implication

Key Points

Cite This Study

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