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Stochastic Data-Driven POD-Based Modeling for High-Fidelity Coarsening of Two-Dimensional Rayleigh-Bénard Turbulence
A stochastic data-driven based model is proposed to augment coarse-grid numerical simulations of two-dimensional Rayleigh-Bénard convection. Proper...
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Dynamics of plane waves on two-dimensional isotropic and anisotropic dissipative systems near subcritical bifurcation
In this work, stability analysis of plane wave solutions of the cubic-quintic complex Ginzburg–Landau equation for isotropic and anisotropic systems...
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Relations Between Statistics of Three-Dimensional Flame Curvature and its Two-Dimensional Counterpart in Turbulent Premixed Flames
The relations between the actual flame curvature probability density function (PDF) evaluated in three-dimensions and its two-dimensional counterpart...
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Representing the Small Scales of Turbulence by Periodic Box Homogeneous Isotropic Turbulence Simulations
Large Eddy Simulations (LESs) use Sub-Grid Scale (SGS) models to account for the effects of the unresolved scales of turbulence. The complex...
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Turbulence Models for Compressible Disperse Multiphase Flows
Multiphase turbulence driven by coupling between the phases can arise in the absence of mean shear. For example, due to gravity (or other body...
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Measurements for Characteristics of Turbulence over a Streamwise Preferential Porous Substrate
To investigate the turbulence characteristics over a streamwise-preferential porous substrate, we design a layered porous medium that satisfies the...
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Effect of thermal fluctuations on homogeneous compressible turbulence
For more than a century, it has been widely believed that there is a clear gap between molecular motions at the microscopic level and turbulent...
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The Research on Boundary Element Method of Cavitation Characteristics of Two-Dimensional Hydrofoil
Cavitation occurrence, growth and collapse often lead to great instability of flow field structure, which usually brings about cavitation, vibration...
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Homogeneous turbulence in a random-jet-stirred tank
We report an investigation into random-jet-stirred homogeneous turbulence generated in a vertical octagonal prism-shaped tank where there are jet...
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Synthetic Lagrangian turbulence by generative diffusion models
Lagrangian turbulence lies at the core of numerous applied and fundamental problems related to the physics of dispersion and mixing in engineering,...
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Deep learning-based optical flow analysis of two-dimensional Rayleigh scattering imaging of high-speed flows
AbstractVelocity field quantification for high-speed flows is of fundamental importance to understand flow dynamics, turbulence, and flow–structure...
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Direct Numerical Simulation of Two-Dimensional Turbulence and Investigation of the Boundary Conditions Influence on the Energy Cascade Formation
We consider a two-dimensional turbulence in a finite cell excited by a periodic external force (pum**) with a wavelength of the order of the cell...
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Numerical Simulation of a Two-Dimensional Spatial Unsteady Flow Past Thick Airfoils and Low-Aspect-Ratio Wings with Slot Suction in a Vortex Cell as Applied to Hybrid Aerostatic Aircraft
Using numerical simulation on the basis of Reynolds-averaged Navier–Stokes equations in their closure with the SST turbulence model, a comparison has...
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Nearly homogeneous and isotropic turbulence generated by the interaction of supersonic jets
This study reports the development and characterization of a multiple-supersonic-jet wind tunnel designed to investigate the decay of nearly...
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Reducing honeycomb-generated turbulence with a passive grid
AbstractHoneycombs are widely used to laminarize fluid streams by inhibiting the lateral components of the fluctuating velocity. However, they also...
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Signal Processing Methods Related to Models of Turbulence
Turbulence deals with the complex motions in fluid at high velocity and/or involving a large range of length-scales. Understanding turbulence is...
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An experimental apparatus for generating homogeneous isotropic turbulence
An experimental apparatus using synthetic jets to generate zero mean flow homogeneous isotropic turbulence (HIT) in the center of a cubic water tank...
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Comparison of Turbulence Methods for a Stepped Spillway Using Computational Fluid Dynamics
The computational fluid dynamics (CFD) method is used effectively in hydraulic engineering and many other sciences. However, determining which...
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Flow turbulence presented by different vegetation spacing sizes within a submerged vegetation patch
This study presents results from a vegetation-induced flow experimental study which investigates 3-D turbulence structure profiles, including...
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Turbulence
The Reynolds decomposition and statistical averaging of velocity and pressure generate the Reynolds averaged Navier–Stokes (RANS) equations. The...