Local precursors to anomalous dissipation in Navier-Stokes turbulence: Burgers vortex-type models and simulation analysisAnomalous dissipation is a dissipation mechanism of kinetic energy which is established by a sufficiently spatially rough velocity field. It implies that the rescaled mean kinetic energy dissipation…Georgy Zinchenko, Vladyslav Pushenko, Joerg Schumacher·May 23, 2024SaveLearn
Compressible turbulent convection: The role of temperature-dependent thermal conductivity and dynamic viscosityThe impact of variable material properties, such as temperature-dependent thermal conductivity and dynamical viscosity, on the dynamics of a fully compressible turbulent convection flow beyond the…John Panickacheril John, Jörg Schumacher·May 23, 2024SaveLearn
NeuralFluid: Neural Fluidic System Design and Control with Differentiable SimulationWe present a novel framework to explore neural control and design of complex fluidic systems with dynamic solid boundaries. Our system features a fast differentiable Navier-Stokes solver with…Yifei Li, Yuchen Sun, Pingchuan Ma et al.·May 22, 2024SaveLearn
Flow and Heat Transfer in a Rotating Disc Cavity With Axial Throughflow at High Speed ConditionsFlow and heat transfer in a compressor rotating disc cavity with axial throughflow is investigated using wall-modelled large-eddy simulations (WMLES). These are compared to measurements from recently…Ruonan Wang, John W. Chew, Feng Gao et al.·May 22, 2024SaveLearn
Neural Networks-based Random Vortex Methods for Modelling Incompressible FlowsIn this paper we introduce a novel Neural Networks-based approach for approximating solutions to the (2D) incompressible Navier--Stokes equations, which is an extension of so called Deep Random…Vladislav Cherepanov, Sebastian W. Ertel·May 22, 2024SaveLearn
Optimal transient growth and transition to turbulence in the MHD pipe flow subject to a transverse magnetic fieldWe consider the influence of a transverse magnetic field on the transient growth of perturbations in a liquid-metal circular pipe flow with an electrically insulating or conducting wall. In this…Yelyzaveta Velizhanina, Bernard Knaepen·May 22, 2024SaveLearn
Multi-fidelity topology optimization of flow boiling heat transfer in microchannelsTopology optimization (TO) is a powerful method to design innovative structures with improved heat transfer performance. In the present study, a multi-fidelity TO method with a delicately defined…Yi Yuan, Li Chen, Qirui Yang et al.·May 22, 2024SaveLearn
Deformation and breakup of the liquid ligament with various disturbances on the interface in shear flowThis study performed a numerical analysis of the deformation and breakup of a liquid ligament with various disturbances on the interface in shear flow. The shear flow generates a three-dimensional…Hideki Yanaoka, Wataru Sakamoto·May 22, 2024SaveLearn
Deep operator learning-based surrogate models for aerothermodynamic analysis of AEDC hypersonic waveriderNeural networks are universal approximators that traditionally have been used to learn a map between function inputs and outputs. However, recent research has demonstrated that deep neural networks…Khemraj Shukla, Jasmine Ratchford, Luis Bravo et al.·May 21, 2024SaveLearn
Adaptive coupling of 3D and 2D fluid flow modelsSimilar to the notion of h-adaptivity, where the discretization resolution is adaptively changed, I propose the notion of model adaptivity, where the underlying model (the governing equations) is…Pratik Suchde·May 21, 2024SaveLearn
Effect of Synthetic Jets Actuator Parameters on Deep Reinforcement Learning-Based Flow Control Performance in a Square CylinderWe conduct an active flow control (AFC) study on the mass flow rate of synthetic jets on the upper and lower surfaces of a square cylinder using a deep reinforcement learning (DRL) algorithm, with a…Wang Jia, Hang Xu·May 21, 2024SaveLearn
Hydrodynamic instability of shear imposed falling film over a uniformly heated inclined undulated substrateLinear and weakly nonlinear stability analyses of an externally shear-imposed, gravity-driven falling film over a uniformly heated wavy substrate are studied. The longwave asymptotic expansion…Md. Mouzakkir Hossain, Sukhendu Ghosh, Harekrushna Behera et al.·May 21, 2024SaveLearn
Colloidal bubble propulsion mediated through viscous flowsBubble-propelled catalytic colloids stand out as a uniquely efficient design for artificial controllable micromachines, but so far lack a general theoretical framework that explains the physics of…Alexander Chamolly, Sébastien Michelin, Eric Lauga·May 21, 2024SaveLearn
Subgrid scale modeling of droplet bag breakup in VOF simulationsThe mesh-dependency of the breakup of liquid films, including their breakup length scales and resulting drop size distributions, has long been an obstacle inhibiting the computational modeling of…Austin Han, Olivier Desjardins·May 21, 2024SaveLearn
Flow Through Porous Media at the Percolation TransitionWe study low-Reynolds-number fluid flow through a two-dimensional porous medium modeled as a Lorentz gas. Using extensive finite element simulations we fully resolve the flow fields for packing…Mirko Residori, Suvendu Mandal, Axel Voigt et al.·May 20, 2024SaveLearn
Heat Transfer Rate Measurements in a Shock-Focused Region in AirAn experimental investigation was carried out to study heat transfer rates in a high-temperature, high-pressure region generated using the shock focusing technique. A shock tube test facility with a…Saranyamol V. S., Jithin Sreekumar, Mohammed Ibrahim S·May 20, 2024SaveLearn
Persistence of large scale coherent structures in a turbulent pipe flow through an improved lattice Boltzmann approachWe simulated a turbulent pipe flow within the Lattice Boltzmann Method using a multiple-relaxation-time collision operator with Maxwell-Boltzmann equilibrium distribution expanded, for the sake of a…B. Magacho, L. Moriconi, J. B. R. Loureiro·May 20, 2024SaveLearn
A deep-water closure model for surface waves on axisymmetric swirling flowsWe consider the propagation of linear gravity waves on the free surface of steady, axisymmetric flows with purely azimuthal velocity. We propose a two-dimensional set of governing equations for…Emanuele Zuccoli, Edward James Brambley, Dwight Barkley·May 20, 2024SaveLearn
Wall-resolved large eddy simulations of a pitching airfoil incurring in deep dynamic stallThis study investigates the flow evolution around a sinusoidal pitching NACA 0012 airfoil, defined by the National Advisory Committee for Aeronautics (NACA), undergoing deep dynamic stall using a…Giacomo Baldan, Alberto Guardone·May 20, 2024SaveLearn
Lifetime Characterization of Extreme Wave Localizations in Crossing SeasRogue waves (RWs) can form on the ocean surface due to quasi-four wave resonant interaction or superposition principle. Both mechanisms have been acutely studied. The first of the two is known as the…Yuchen He, Jinghua Wang, Jingsong He et al.·May 20, 2024SaveLearn
Influence of preferential diffusion on the distribution of species in lean H2-air laminar premixed flames at different equivalence ratiosThe influence of equivalence ratio on preferential diffusion effects and the resulting changes in the distributions of major species and their reaction rates have been analysed based on 2D…Frederick W Young, Umair Ahmed, Nilanjan Chakraborty·May 20, 2024SaveLearn
Stabilization of vapor-rich bubble in ethanol/water mixtures and enhanced flow around the bubbleThis study investigates the behavior of microbubbles generated by the local heating of an ethanol/water mixture and the surrounding flow. The mixture is photothermally heated by focusing a…Mizuki Kato, Kyoko Namura, Shinya Kawai et al.·May 20, 2024SaveLearn
Analysis of the Pressure-Velocity boundary conditions for the projection method solution of the incompressible Navier-Stokes EquationsThe projection method is the standard approach for numerically integrating the incompressible Navier-Stokes equation initial-boundary-value problem. Typical boundary conditions specify either the…Leonid Pekker, David Pekker·May 19, 2024SaveLearn
Godunov Loss Functions for Modelling of Hyperbolic Conservation LawsMachine learning techniques are being used as an alternative to traditional numerical discretization methods for solving hyperbolic partial differential equations (PDEs) relevant to fluid flow.…R. G. Cassia, R. R. Kerswell·May 19, 2024SaveLearn
Probing double distribution function models in the lattice Boltzmann method for highly compressible flowsThe double distribution function approach is an efficient route towards extension of kinetic solvers to compressible flows. With a number of realizations available, an overview and comparative study…S. A. Hosseini, A. Bhadauria, I. V. Karlin·May 19, 2024SaveLearn