Flow structure beneath periodic waves with constant vorticity under strong horizontal electric FieldsWhile several articles have been written on Electrohydrodynamics (EHD) flows or flows with constant vorticity separately, little is known about the extent to which the combined effects of EHD and…M. V. Flamarion, E. Kochurin, R. Ribeiro-Jr et al.·Jan 23, 2024SaveLearn
Circulation in turbulent flow through a contractionWe study experimentally the statistical properties and evolution of circulation in a turbulent flow passing through a smooth 2-D contraction. The turbulence is generated with an active grids to reach…Vivek Mugundhan, Sigurdur T. Thoroddsen·Jan 23, 2024SaveLearn
Approximation of sea surface velocity field by fitting surrogate two-dimensional flow to scattered measurementsIn this paper, a rapid approximation method is introduced to estimate the sea surface velocity field based on scattered measurements. The method uses a simplified two-dimensional flow model as a…Karlo Jakac, Luka Lanča, Ante Sikirica et al.·Jan 23, 2024SaveLearn
The effect of contact angle hysteresis on a droplet in a viscoelastic two-phase systemWe investigate the dynamic behaviour of a two-dimensional (2D) droplet adhering to a wall in Poiseuille flow at low Reynolds numbers, in a system where either the droplet is viscoelastic (V/N) or the…Kazem Bazesefidpar, Outi Tammisola·Jan 23, 2024SaveLearn
A length scale for non-local multi-scale gradient interactions in isotropic turbulenceThree-dimensional turbulent flows enhance velocity gradients via strong non-linear interactions of the rate-of-strain tensor with the vorticity vector, and with itself. For statistically homogeneous…Miguel P. Encinar·Jan 23, 2024SaveLearn
Compressible single-phase flows in heated and cooled ductsAnalytical/quasi-analytical solutions are proposed for a steady, compressible, single-phase flow in a rectilinear duct subjected to heating followed by cooling. The flow is driven by the pressure…S Schropff, F Petitpas, E Daniel·Jan 23, 2024SaveLearn
Linear stability and spectral modal decomposition of three-dimensional turbulent wake flow of a generic high-speed trainThis work investigates the spatio-temporal evolution of coherentstructures in the wake of a high-speed train. SPOD is used to extract energy spectra and empirical modes for both symmetric and…Xiao-Bai Li, Simon Demange, Guang Chen et al.·Jan 23, 2024SaveLearn
Deep reinforcement transfer learning for active flow control of a 3D square cylinder under state dimension mismatchThis paper focuses on developing a deep reinforcement learning (DRL) control strategy to mitigate aerodynamic forces acting on a three dimensional (3D) square cylinder under high Reynolds number flow…Lei Yan, Gang Hu, Wenli Chen et al.·Jan 23, 2024SaveLearn
Existence of three distinct scaling regimes in self-propelled rigid pitching airfoilWe investigate the effect of imposed kinematics on the self-propulsion of the NACA0015 symmetric airfoil section subject to sinusoidal pitching. We employ a rotary apparatus capable of achieving…Rakshita Joshi, Jaywant Arakeri·Jan 23, 2024SaveLearn
Acoustic pressure modulation driven by spatially non-uniform flowThe recent identification of a modulation of acoustic waves that is driven by spatial velocity gradients, using acoustic black and white hole analogues [Schenke et al., J. Acoust. Soc. Am. 154…Fabian Denner·Jan 22, 2024SaveLearn
A Moving Surface Drag Model for LES of Wind over WavesNumerical prediction of the interactions between wind and ocean waves is essential for climate modeling and a wide range of offshore operations. Large Eddy Simulation (LES) of the marine atmospheric…Manuel Ayala, Zein Sadek, Ondřej Ferčák et al.·Jan 22, 2024SaveLearn
Quasi-Two-Dimensional DropsLiquid drops are everywhere around us and important in numerous technological applications. Here, we demonstrate a quasi-two-dimensional (Q2D) analogy to the regular, often close to axisymmetric,…Tytti Kärki, Into Pääkkönen, Nikos Kyriakopoulos et al.·Jan 22, 2024SaveLearn
Aspect-ratio effect on the wake of a wall-mounted square cylinder immersed in a turbulent boundary layerThe wake topology developing behind a wall-mounted square cylinder in a turbulent boundary layer has been investigated using a high-resolution large-eddy simulation (LES). The boundary-layer…Gerardo Zampino, Marco Atzori, Elias Zea et al.·Jan 22, 2024SaveLearn
Spatial discretization effects in spanwise forcing for turbulent drag reductionWall-based spanwise forcing has been experimentally used with success by Auteri et al. (Phys. Fluids vol. 22, 2010, 115103) to obtain large reductions of turbulent skin-friction drag and considerable…Emanuele Gallorini, Maurizio Quadrio·Jan 22, 2024SaveLearn
Rotational Taylor dispersion in linear flowsThe coupling between advection and diffusion in position space can often lead to enhanced mass transport compared to diffusion without flow. An important framework used to characterize the long-time…Zhiwei Peng·Jan 21, 2024SaveLearn
Effects of inlet and secondary flow conditions on the flow field of rotating detonation engines with film coolingA three-dimensional simulation of the rotating detonation engine (RDE) with film cooling is conducted. The aim of this study is to analyze the fluid dynamics and heat transfer of the detonation flow…Jingtian Yu, Songbai Yao, Jingzhe Li et al.·Jan 21, 2024SaveLearn
Asynchronous Parallel Reinforcement Learning for Optimizing Propulsive Performance in Fin Ray ControlFish fin rays constitute a sophisticated control system for ray-finned fish, facilitating versatile locomotion within complex fluid environments. Despite extensive research on the kinematics and…Xin-Yang Liu, Dariush Bodaghi, Qian Xue et al.·Jan 21, 2024SaveLearn
Aeroacoustics -- Theory and methods for analyzing flow-induced sound generation of technical and biological applicationsFlow instabilities, wave propagation phenomena, and structural interaction are current topics of the field "Flow acoustics" also named "Aeroacoustics". Assuming the theory of classical mechanics,…Stefan Schoder·Jan 20, 2024SaveLearn
Weaving classical turbulence with quantum skeletonMatter entanglement is a common chaotic structure in both quantum and classical systems. Turbulence can be pictured as a tangle of vortex filaments in superfluids and viscous vortices in classical…Weiyu Shen, Jie Yao, Yue Yang·Jan 20, 2024SaveLearn
A novel model for direct numerical simulation of suspension dynamics with arbitrarily shaped convex particlesThis study presents an innovative direct numerical simulation approach for complex particle systems with irregular shapes and large numbers. Using partially saturated methods, it accurately models…J. E. Marquardt, N. Hafen, M. J. Krause·Jan 19, 2024SaveLearn
Self-tuning model predictive control for wake flowsThis study presents a noise-robust closed-loop control strategy for wake flows employing model predictive control. The proposed control framework involves the autonomous offline selection of…Luigi Marra, Andrea Meilán-Vila, Stefano Discetti·Jan 19, 2024SaveLearn
Quasi all-speed schemes for magnetohydrodynamic flows in a wide range of Mach numbersWe present novel numerical schemes for ideal magnetohydrodynamic (MHD) simulations aimed at enhancing stability against numerical shock instability and improving the accuracy of low-speed flows in…Takashi Minoshima·Jan 19, 2024SaveLearn
Physics-constrained convolutional neural networks for inverse problems in spatiotemporal partial differential equationsWe propose a physics-constrained convolutional neural network (PC-CNN) to solve two types of inverse problems in partial differential equations (PDEs), which are nonlinear and vary both in space and…Daniel Kelshaw, Luca Magri·Jan 18, 2024SaveLearn
Flow Structure near Three Phase Contact Line of Low-Contact-Angle Evaporating DropletsFlow structure near three phase contact line (TPCL) of evaporating liquids plays a significant role in liquid wetting and dewetting, liquid film evaporation and boiling, etc. Despite the wide focus…Zhenying Wang, George Karapetsas, Prashant Valluri et al.·Jan 18, 2024SaveLearn
Real-time and On-site Aerodynamics using Stereoscopic PIV and Deep Optical Flow LearningWe introduce Recurrent All-Pairs Field Transforms for Stereoscopic Particle Image Velocimetry (RAFT-StereoPIV). Our approach leverages deep optical flow learning to analyze time-resolved and…Mohamed Elrefaie, Steffen Hüttig, Mariia Gladkova et al.·Jan 18, 2024SaveLearn