Efficient Active Flow Control Strategy for Confined Square Cylinder Wake Using Deep Learning-Based Surrogate Model and Reinforcement LearningThis study presents a deep learning model-based reinforcement learning (DL-MBRL) approach for active control of two-dimensional (2D) wake flow past a square cylinder using antiphase jets. The DL-MBRL…Meng Zhang, Mustafa Z. Yousif, Minze Xu et al.·Aug 26, 2024SaveLearn
An open-source, adaptive solver for particle-resolved simulations with both subcycling and non-subcycling methodsWe present the IAMReX, an adaptive and parallel solver for particle-resolved simulations on the multi-level grid. The fluid equations are solved using a finite-volume scheme on the block-structured…Xuzhu Li, Chun Li, Xiaokai Li et al.·Aug 26, 2024SaveLearn
Fluid wetting and penetration characteristics in T-shaped microchannelsA thorough understanding of media tightness in automotive electronics is crucial for ensuring more reliable and compact product designs, ultimately improving product quality. Concerning the…Huijie Zhang, Anja Lippert, Ronny Leonhardt et al.·Aug 26, 2024SaveLearn
Correlations for aerodynamic force coefficients of non-spherical particles in compressible flowsThis study presents particle-resolved direct numerical simulations using three-dimensional body-fitted hexahedral meshes to investigate the aerodynamic force and torque coefficients of non-spherical…Christian Gorges, Victor Chéron, Anjali Chopra et al.·Aug 25, 2024SaveLearn
Physical structures of boundary fluxes of orbital rotation and spin for incompressible viscous flowVorticity is locally created on a boundary at the rate measured by the boundary vorticity flux, which can be further decomposed as the sum of the orbital rotation and the (generalized) spin. For…Tao Chen·Aug 25, 2024SaveLearn
Towards a universal law for blood flowDespite decades of research on blood flow, an analogue of Navier-Stokes equations that accurately describe blood flow properties has not been established yet. The reason behind this is that the…Alexander Farutin, Abdessamad Nait-Ouhra, Gopal Dixit et al.·Aug 25, 2024SaveLearn
Glacierware: Hotspot-aware Microfluidic Cooling for High TDP Chips using Topology OptimizationThe continuous increase in computational power of GPUs, essential for advancements in areas like artificial intelligence and data processing, is driving the adoption of liquid cooling in data…Athanasios Boutsikakis, Emile Soutter, Miguel A. Salazar de Troya et al.·Aug 25, 2024SaveLearn
Enhancement of bacterial rheotaxis in non-Newtonian fluidsBacteria often exhibit upstream swimming, which can cause the contamination of biomedical devices and the infection of organs including the urethra or lungs. This process, called rheotaxis, has been…Bryan O. Torres Maldonado, Albane Théry, Ran Tao et al.·Aug 24, 2024SaveLearn
Modeling height profile for Drop-on-demand print of UV curable inkThis paper proposes a height profile model for drop-on-demand printing of UV curable ink. Existing models includesuperposition of single drops, numerical models, and graphic-based model. They are…Yumeng Wu, George Chiu·Aug 24, 2024SaveLearn
An improved model of height profile for Drop-on-demand print of UV curable inkThis paper proposes an improved model of height profile for drop-on-demand printing of UV curable ink. Unlike previous model, the proposed model propagates volume and covered area based on height…Yumeng Wu, George Chiu·Aug 24, 2024SaveLearn
Effective Block Preconditioners for Fluid Dynamics Coupled to Reduced Models of a Non-Local NatureModeling cardiovascular blood flow is central to many applications in biomedical engineering. To accommodate the complexity of the cardiovascular system, in terms of boundary conditions and…Marc Hirschvogel, Mia Bonini, Maximilian Balmus et al.·Aug 24, 2024SaveLearn
A Divide-and-Conquer Machine Learning Approach for Modelling Turbulent FlowsIn this paper, a novel zonal machine learning (ML) approach for Reynolds-averaged Navier-Stokes (RANS) turbulence modelling based on the divide-and-conquer technique is introduced. This approach…Anthony Man, Mohammad Jadidi, Amir Keshmiri et al.·Aug 24, 2024SaveLearn
Streamwise energy-transfer mechanisms in zero- and adverse-pressure-gradient turbulent boundary layersThe present study investigates streamwise (u2) energy-transfer mechanisms in the inner and outer regions of turbulent boundary layers (TBLs). Particular focus is placed on the…Rahul Deshpande, Ricardo Vinuesa·Aug 24, 2024SaveLearn
On the Hamiltonian structure of the intrinsic evolution of a closed vortex sheetMotivated by the work of previous authors on vortex sheets and their applications, the intrinsic inviscid evolution equations of a closed vortex sheet in a plane, separating two piecewise constant…Banavara N. Shashikanth·Aug 24, 2024SaveLearn
Inferring the shape of a solid inside a draining tank from its liquid level dynamicsWe aim to reconstruct the shape of an exogenous, heavy solid contained in a tank from measurements of the liquid level in the tank as it drains (driven by gravity) through a small orifice in its…Gbenga Fabusola, Cory M. Simon·Aug 24, 2024SaveLearn
Stratified Resistive Tearing InstabilityResistive tearing instabilities are common in fluids that are highly electrically conductive and carry strong currents. We determine the effect of stable stratification on the tearing instability…Scott J. Hopper, Toby S. Wood, Paul J. Bushby·Aug 23, 2024SaveLearn
Fluid-network relations: decay laws meet with spatial self-similarity, scale-invariance, and control scalingDiverse implicit structures of fluids are discovered lately, providing opportunities to study the physics of fluids applying network analysis. Although considerable works devote to identifying…Yang Tian, Pei Sun, Yizhou Xu·Aug 23, 2024SaveLearn
Turbulent convection in emulsions: the Rayleigh-B\'enard configurationThis study explores heat and turbulent modulation in three-dimensional multiphase Rayleigh-B\'enard convection using direct numerical simulations. Two immiscible fluids with identical reference…Abbas Moradi Bilondi, Nicolò Scapin, Luca Brandt et al.·Aug 23, 2024SaveLearn
Hydrodynamic interaction between coaxially rising bubbles in elasto-visco-plastic materials: Bubbles with a wide range of relative sizesWe consider the buoyancy-driven rise and interaction between two gravity-aligned bubbles of wide radii ratio and constant volume in an elasto-visco-plastic (EVP) material, extending our previous work…Athanasios Kordalis, Yannis Dimakopoulos, John Tsamopoulos·Aug 23, 2024SaveLearn
Programmable Jumping-Droplet CondensationSelf-propelled droplet jumping during condensation has attractive prospects for energy harvesting, water collection and thermal management, but its real-life applications are greatly limited to the…Shan Gao, Jian Qu, Dehui Wang et al.·Aug 23, 2024SaveLearn
Nonlinear estimation in turbulent channel flowsWe design a nonlinear estimator for channel flows at Reτ=180 and 590. The nonlinear estimator uses a linear estimator structure based on the linearised Navier-Stokes equations and…Jitong Ding, Simon J. Illingworth·Aug 23, 2024SaveLearn
Understanding the effects of rotation on the wake of a wind turbine at high Reynolds numberThe wake of a horizontal-axis wind turbine was studied at ReD=4×106 with the aim of revealing the effects of the tip speed ratio, λ, on the wake. Tip speed ratios of 4<λ<7…Alexander Pique, Mark A. Miller, Marcus Hultmark·Aug 22, 2024SaveLearn
Unifying theory of scaling in drop impact: Forces & maximum spreading diameterThe dynamics of drop impact on a rigid surface -- omnipresent in nature and technology -- strongly depends on the droplet's velocity, its size, and its material properties. The main characteristics…Vatsal Sanjay, Detlef Lohse·Aug 22, 2024SaveLearn
Basset-Boussinesq history force and inertia are relevant for unsteady particle settling dynamicsOur experiments on a sphere falling under gravity in Stokes flow show significant history effects. We observe an algebraic, not exponential, relaxation rate to the terminal velocity, validating the…Tomek Jaroslawski, Divya Jaganathan, Rama Govindarajan et al.·Aug 22, 2024SaveLearn
Waves beneath a drop levitating over a moving wallIn recent experiments, Sawaguchi et al. directly probed the lubrication layer of air beneath a droplet levitating inside a rotating cylindrical drum. For small rotation rates of the drum, the…Kyle I. McKee, Bauyrzhan K. Primkulov, Kotaro Hashimoto et al.·Aug 22, 2024SaveLearn