Level crossing instabilities in inviscid isothermal compressible Couette flowWe study the linear stability of inviscid steady parallel flow of an ideal gas in a channel of finite width. Compressible isothermal two-dimensional monochromatic perturbations are considered. The…Govind S. Krishnaswami, Sonakshi Sachdev, Pritish Sinha·Dec 30, 2024SaveLearn
Air entrainment and gas transfer processes in wave breaking eventsWe investigate gas transfer processes occurring at the air-water interface of progressive water waves using high-fidelity numerical simulations. Waves with varying initial steepness, including…Simone Di Giorgio, Sergio Pirozzoli, Alessandro Iafrati·Dec 29, 2024SaveLearn
2D Internal Gravity Wave TurbulenceUsing weak wave turbulence theory analysis, we distinguish three main regimes for 2D stratified fluids in the dimensionless parameter space defined by the Froude number and the Reynolds number:…Vincent Labarre, Michal Shavit·Dec 29, 2024SaveLearn
A theoretical study of the upper bound of surface elevation variance in the Phillips initial stage during wind-wave generationThe resonance mechanism in the initial stage of wind-wave generation proposed by Phillips (J. Fluid Mech., vol. 2, 1957, 417x2013445) is a foundation of wind-wave generation theory, but a…Tianyi Li, Lian Shen·Dec 29, 2024SaveLearn
The destabilizing effect of particle concentration in inclined settlersWater scarcity has required constant water recycling, leading to a decline in water quality, further exacerbated by high concentrations of fine particles that reduce the efficiency of solid-liquid…Cristian Reyes, Cristobal Arratia, Christian Ihle·Dec 28, 2024SaveLearn
Reacting Hydrogen Jet in Crossflow - Flame Dynamics Under Acoustic ForcingThis paper presents experimental study of reacting hydrogen jet in crossflow. High speed shadowgraph images are used to capture flame dynamics. Unforced jets with various momentum flux ratios (q) are…Ankur Kumar, Anubhav sinha·Dec 28, 2024SaveLearn
Current State of Atmospheric Turbulence CascadesTurbulence cascade has been modeled using various methods; the one we have used applies to a more exact representation of turbulence where people use the multifractal representation. The nature of…Vicente Corral Arreola, Arturo Rodriguez, Vinod Kumar·Dec 27, 2024SaveLearn
Modeling Continuous Spatial-temporal Dynamics of Turbulent Flow with Test-time RefinementThe precise simulation of turbulent flows holds immense significance across various scientific and engineering domains, including climate science, freshwater science, and energy-efficient…Shengyu Chen, Peyman Givi, Can Zheng et al.·Dec 27, 2024SaveLearn
Flow of suspensions in a hydraulic fracture consisting of Herschel-Bulkley fluid and spherical particlesThe purpose of this study is to develop a model for the flow of suspensions consisting of Herschel-Bulkley fluid mixed with spherical particles. In particular, the focus is to investigate the effect…E. V. Dontsov, S. A. Boronin, A. A. Osiptsov·Dec 27, 2024SaveLearn
Effects of Reynolds number and spatial resolution on the pressure source terms in turbulent boundary layersThe increase in wall-pressure fluctuations with increasing friction Reynolds number (Reτ) of a turbulent boundary layer (TBL) is well known in the literature. However, very few studies have…Aditya Agarwal, Rahul Deshpande·Dec 27, 2024SaveLearn
Resolvent-based estimation and control of a laminar airfoil wakeWe develop an optimal resolvent-based estimator and controller to predict and attenuate unsteady vortex shedding fluctuations in the laminar wake of a NACA 0012 airfoil at an angle of attack of 6.5…Junoh Jung, Rutvij Bhagwat, Aaron Towne·Dec 27, 2024SaveLearn
Diffraction of walking drops by a standing Faraday waveThe Kapitza-Dirac effect is the diffraction of quantum particles by a standing wave of light. We here report an analogous phenomenon in pilot-wave hydrodynamics, wherein droplets walking across the…Bauyrzhan K. Primkulov, Davis J. Evans, Valeri Frumkin et al.·Dec 25, 2024SaveLearn
Amplifying vortex shedding for energy harvesting with active flow controlEnergy harvesting from vortex-induced vibrations is a promising technology that relies on the vibrations of bluff bodies due to vortex shedding. Increasing the vibration amplitude at a given free…Varun Varma Jaganath, Ben Steinfurth·Dec 25, 2024SaveLearn
Implicit factorized transformer approach to fast prediction of turbulent channel flowsTransformer neural operators have recently become an effective approach for surrogate modeling of systems governed by partial differential equations (PDEs). In this paper, we introduce a modified…Huiyu Yang, Yunpeng Wang, Jianchun Wang·Dec 25, 2024SaveLearn
Computational Assessment of Turbulent Eddy Impact on Hydrodynamic Mixing in a Stirred Tank Bioreactor with Vent based ImpellersHomogeneity and efficient oxygen transfer are crucial for aerobic cultures, which is popularly performed in Stirred Tank Bioreactors, through internal mechanical agitation of the impellers.Although…Ayodele James Oyejide, Chidera Samuella Okeke, Jesuloluwa Emmanuel Zaccheus et al.·Dec 24, 2024SaveLearn
Multi-range fractional model for convective atmospheric surface-layer turbulenceWe develop a multi-range fractional (MRF) model to capture the turbulent spectrum consisting of multiple self-similar ranges impacted by multiple effects. The MRF model is validated using long-term…Fei-Chi Zhang, Jin-Han Xie, Xiaojing Zheng·Dec 24, 2024SaveLearn
Effects of Turbulence Modeling and Parcel Approach on Dispersed Two-Phase Swirling FlowSeveral numerical simulations of a co-axial particle-laden swirling air flow in a vertical circular pipe were performed. The air flow was modeled using the unsteady Favre-averaged Navier-Stokes…Osama A. Marzouk, E. David Huckaby·Dec 24, 2024SaveLearn
Multifluid simulation of shear-induced migration in pressure-driven suspension flowsThe present study simulates shear-induced migration (SIM) in semi-dilute pressure-driven Stokes suspension flows using a multi-fluid (MF) model. Building on analysis from a companion paper (Harvie,…Mohammad Noori, Joseph D. Berry, Dalton J. E. Harvie·Dec 24, 2024SaveLearn
A Review of 3D Particle Tracking and Flow Diagnostics Using Digital HolographyAdvanced three-dimensional (3D) tracking methods are essential for studying particle dynamics across a wide range of complex systems, including multiphase flows, environmental and atmospheric…Shyam Kumar M, Jiarong Hong·Dec 24, 2024SaveLearn
Effect of time-dependent sinusoidal electric field on the onset of electroconvection in a viscoelastic fluid layerTime-periodic electric field modulation of a viscoelastic dielectric fluid layer heated from below and cooled from above is examined using an Oldroyd-B type liquid. On the basis of small amplitudes…C. Rudresha, C. Balaji, V. Vidya Shree et al.·Dec 23, 2024SaveLearn
Effective transport by 2D turbulence: Vortex-gas theory vs. scale-invariant inverse cascadeThe scale-invariant inverse energy cascade is a hallmark of 2D turbulence, with its theoretical energy spectrum observed in both direct numerical simulations (DNS) and laboratory experiments. Under…Julie Meunier, Basile Gallet·Dec 23, 2024SaveLearn
AeroDiT: Diffusion Transformers for Reynolds-Averaged Navier-Stokes Simulations of Airfoil FlowsReal-time and accurate prediction of aerodynamic flow fields around airfoils is crucial for flow control and aerodynamic optimization. However, achieving this remains challenging due to the high…Chunyang Wang, Biyue Pan, Zhibo Dai et al.·Dec 23, 2024SaveLearn
Marangoni flow driven hysteresis and azimuthal symmetry breaking in evaporating binary dropletsThe non-uniform evaporation rate at the liquid-gas interface of binary droplets induces solutal Marangoni flows. In glycerol-water mixtures (positive Marangoni number, where the more volatile fluid…Duarte Rocha, Detlef Lohse, Christian Diddens·Dec 22, 2024SaveLearn
Marangoni-driven patterns, ridges, and hills in surfactant-covered parametric surface wavesParametric oscillations of an interface separating two fluid phases create nonlinear surface waves, called Faraday waves, which organise into simple patterns, like squares and hexagons, as well as…Debashis Panda, Lyes Kahouadji, Laurette Tuckerman et al.·Dec 22, 2024SaveLearn
Reconfiguration and dynamics of clamped fibers under finite-amplitude surface gravity wavesWe investigate the behaviour of a flexible stem completely submerged under a surface gravity wave of finite amplitude using fully resolved direct numerical simulations. By varying the rigidity of the…Giulio Foggi Rota, Alessandro Chiarini, Marco Edoardo Rosti·Dec 22, 2024SaveLearn