JAX-SPH: A Differentiable Smoothed Particle Hydrodynamics FrameworkParticle-based fluid simulations have emerged as a powerful tool for solving the Navier-Stokes equations, especially in cases that include intricate physics and free surfaces. The recent addition of…Artur P. Toshev, Harish Ramachandran, Jonas A. Erbesdobler et al.·Mar 7, 2024SaveLearn
Scaling relations for heat and momentum transport in sheared Rayleigh-B\'enard convectionWe provide scaling relations for the Nusselt number Nu and the friction coefficient CS in sheared Rayleigh-B\'enard convection, i.e., in Rayleigh-B\'enard flow with Couette or Poiseuille type…Guru Sreevanshu Yerragolam, Christopher J. Howland, Richard J. A. M. Stevens et al.·Mar 7, 2024SaveLearn
Upper bound of heat flux in an anelastic model for Rayleigh-B\'enard convectionBounds on heat transfer have been the subject of previous studies concerning convection in the Boussinesq approximation: in the Rayleigh-B\'enard configuration, the first result obtained by…T. Alboussière, Y. Ricard, S. Labrosse·Mar 7, 2024SaveLearn
The dynamics of fibers dispersed in viscoelastic turbulent flowsThis study explores the dynamics of finite-size fibers suspended freely in a viscoelastic turbulent flow. For a fiber suspended in Newtonian flows, two different flapping regimes were identified…M. S. Aswathy, Marco E Rosti·Mar 7, 2024SaveLearn
Pairwise interaction of spherical particles aligned in oscillatory flowWe present a systematic simulation campaign to investigate the pairwise interaction of two mobile, monodisperse particles submerged in a viscous fluid and subjected to monochromatic oscillating…Fabian Kleischmann, Paolo Luzzatto-Fegiz, Eckart Meiburg et al.·Mar 7, 2024SaveLearn
A mechanistic model for smallpox transmission via inhaled aerosols inside respiratory pathwaysInvestigations on airborne transmission of pathogens constitute a rapidly expanding field, primarily focused on understanding the expulsion patterns of respiratory particulates from infected hosts…Saikat Basu, Abir Malakar, Mohammad Mehedi Hasan Akash·Mar 6, 2024SaveLearn
Magnetoconvection in a Long Vertical Enclosure With Walls of Finite Electrical ConductivityMagnetoconvection in a tall vertical box with vertical hot and cold walls, and an imposed steady uniform magnetic field perpendicular to the temperature gradient, is analyzed numerically. The…Ali Akhtari, Oleg Zikanov, Dmitry Krasnov·Mar 6, 2024SaveLearn
Numerical study of a viscous breaking water wave and the limit of vanishing viscosityWe introduce a numerical strategy to study the evolution of 2D water waves in the presence of a plunging jet. The free-surface Navier-Stokes solution is obtained with a finite but small viscosity. We…Alan Riquier, Emmanuel Dormy·Mar 6, 2024SaveLearn
Modeling thermocapillary microgear rotation and transfer to translational particle propulsionIn this study, we investigate the thermocapillary rotation of microgears at fluid interfaces and extend the concept of geometric asymmetry to the translational propulsion of micron-sized particles.…Tillmann Carl, Clarissa Schoenecker·Mar 6, 2024SaveLearn
Two-dimensional turbulence in a finite boxWe present theory of two-dimensional turbulence excited by an external force in thin fluid films on scales larger than the film thickness. The principal feature of two-dimensional turbulence is the…Igor V. Kolokolov, Vladimir V. Lebedev·Mar 6, 2024SaveLearn
Correlations of fluctuations of two-dimensional flow forced by a random force on top of a shear flowWe examine fluctuations of vorticity excited by an external random force in two-dimensional fluid in the presence of a strong external shear flow. The problem is motivated by the analysis of big…Igor V. Kolokolov, Vladimir V. Lebedev·Mar 6, 2024SaveLearn
Actuation manifold from snapshot dataWe propose a data-driven methodology to learn a low-dimensional manifold of controlled flows. The starting point is resolving snapshot flow data for a representative ensemble of actuations. Key…Luigi Marra, Guy Y. Cornejo Maceda, Andrea Meilán-Vila et al.·Mar 6, 2024SaveLearn
Correlations of vorticity inside a coherent vortexWe examine fluctuations of vorticity inside the coherent vortex, appearing as a consequence of the inverse energy cascade in two-dimensional turbulence. Temporal and spacial correlations can be…Igor V. Kolokolov, Vladimir V. Lebedev, Mariya M. Tumakova·Mar 6, 2024SaveLearn
Non-homogeneous anisotropic bulk viscosity for acoustic wave attenuation in weakly compressible methodsA major limitation of the weakly compressible approaches to simulate incompressible flows is the appearance of artificial acoustic waves that introduce a large mass conservation error and lead to…Dheeraj Raghunathan, Y. Sudhakar·Mar 6, 2024SaveLearn
Prediction of turbulent channel flow using Fourier neural operator-based machine-learning strategyFast and accurate predictions of turbulent flows are of great importance in the science and engineering field. In this paper, we investigate the implicit U-Net enhanced Fourier neural operator…Yunpeng Wang, Zhijie Li, Zelong Yuan et al.·Mar 5, 2024SaveLearn
Decomposing the collision operator in the lattice Boltzmann methodIn transport theory, physical phenomena are well described using the Boltzmann equation, which is efficiently simulated and discretized with the lattice Boltzmann method. The collision step defines…Julius Weinmiller, Benjamin Kellers, Martin P. Lautenschlaeger et al.·Mar 5, 2024SaveLearn
Periodically activated physics-informed neural networks for assimilation tasks for three-dimensional Rayleigh-B\'enard convectionWe apply physics-informed neural networks to three-dimensional Rayleigh-B\'enard convection in a cubic cell with a Rayleigh number of Ra = 106 and a Prandtl number of Pr = 0.7 to assimilate the…Michael Mommert, Robin Barta, Christian Bauer et al.·Mar 5, 2024SaveLearn
Spectral effects of radiating gases on the ignition in a multiswirl staged model combustor using full-spectrum k distribution method -- A Large Eddy Simulation InvestigationRadiative heat transfer has been proven to be important during the ignition process in gas turbine. Those radiating gases (CO2, H2O, CO) generated during combustion may display strong spectral, or…Hongyuan Di, Chaojun Wang, Chuanlong Hu et al.·Mar 5, 2024SaveLearn
Adjoint-based optimal actuation for separated flow past an airfoilThis study computes the optimal normal actuation on the surface of a NACA0012 airfoil at an angle of attack of 15 and a Reynolds number of Re = 1000, using costs defined for minimal drag and…Ernold Thompson, Andres Goza·Mar 4, 2024SaveLearn
Gauging Centrifugal Instabilities in Compressible Free-Shear Layers Via Nonlinear Boundary Region EquationsCurved free shear layers emerge in many engineering problems involving complex flow geometries, such as the flow over a backward facing step, flows with wall injection in a boundary layer, the flow…Omar Es-SAhli, Adrian Sescu, Yuji Hattori·Mar 4, 2024SaveLearn
A new transient higher order compact scheme for computation of flow and heat transfer in nonuniform polar gridsIn this work, a higher order compact (HOC) discretization is developed on the nonuniform polar grid. The discretization conceptualized using the unsteady convection-diffusion equation (CDE) is…Dharmaraj Deka, Shuvam Sen·Mar 4, 2024SaveLearn
Zonostrophic turbulence in the subsurface oceans of the Jovian and Saturnian moonsIn order to characterize the global circulation of the subsurface ocean of Jovian and Saturnian moons, we analyze the properties of 21 three-dimensional simulations of Boussinesq thermal convection…S. Cabanes, T. Gastine, A. Fournier·Mar 4, 2024SaveLearn
Understanding Latent Timescales in Neural Ordinary Differential Equation Models for Advection-Dominated Dynamical SystemsThe neural ordinary differential equation (ODE) framework has emerged as a powerful tool for developing accelerated surrogate models of complex physical systems governed by partial differential…Ashish S. Nair, Shivam Barwey, Pinaki Pal et al.·Mar 4, 2024SaveLearn
Effect of Feathers on Drag in Plunge Diving BirdsThis study explores the impact of feathers on the hydrodynamic drag experienced by diving birds, which is critical to their foraging efficiency and survival. Employing a novel experimental approach,…Florent Dedenedetti, Sunghwan Jung·Mar 3, 2024SaveLearn
Color-switching hydrogels as integrated microfluidic pressure sensorsPrecisely measuring pressure in microfluidic flows is essential for flow control, fluid characterization, and monitoring, but faces specific challenges such as achieving sufficient resolution,…Lucie Ducloué, Md. Anamul Haque, Martyna Goral et al.·Mar 3, 2024SaveLearn