Artificial and Eddy Viscosity in Large Eddy Simulation Part 2: Turbulence ModelsThis is the second part to our companion paper. The novel method to quantify artificial dissipation proposed in Part 1 is further applied in turbulent channel flow at Reτ=180 using…Jing Sun, Roel Verstappen·Feb 12, 2025SaveLearn
Artificial and Eddy Viscosity in Large Eddy Simulation Part 1: Temporal and Spatial SchemesWe propose a novel method to quantify artificial dissipation in large eddy simulation. Here, artificial dissipation is defined as the residual of the discrete turbulent kinetic energy (TKE) equation.…Jing Sun, Roel Verstappen·Feb 12, 2025SaveLearn
Kinetic theory based solutions for particle clustering in turbulent flowsKinetic theory provides an elegant framework for studying dispersed particles in turbulent flows. Here the application of such probability density function (PDF)-based descriptions is considered in…C. P. Stafford, D. C. Swailes, M. W. Reeks·Feb 12, 2025SaveLearn
A numerical method for low Mach number compressible flows by simultaneous relaxation of dependent variablesDensity varies spatiotemporally in low Mach number flows. Hence, incompressibility cannot be assumed, and the density must be accurately solved. Various methods have been proposed to analyze low Mach…Hideki Yanaoka, Yuji Sato·Feb 12, 2025SaveLearn
Role of phase distortion in nonlinear saturation of the unstable acoustic modes in hypersonic parallel flow boundary layerWe analyze the role of the relative phasing in the nonlinear saturation of the unstable Mack modes in a hypersonic parallel flow boundary layer in two dimensions (2D). As the linearly unstable Mack…Altaf Ahmed, Joaquim P. Jossy, Prateek Gupta·Feb 12, 2025SaveLearn
Transient growth and nonlinear breakdown of wavelet-based resolvent modes in turbulent channel flowWe study the effectiveness of the time-localised principal resolvent forcing mode at actuating the near wall cycle of turbulence. The mode is restricted to a wavelet pulse and computed from an SVD of…Eric Ballouz, Scott T. M. Dawson, H. Jane Bae·Feb 12, 2025SaveLearn
Digital Twin for Porous Electrodes in Redox Flow BatteriesPorous electrodes are a vital component of redox flow batteries, fuel cells and electrolyzers. We present a 3D digital twin for a porous electrode by direct numerical solution of the governing…Michael S. Emanuel, Chris H. Rycroft·Feb 12, 2025SaveLearn
Separation control applied to the turbulent flow around a NACA4412 wing sectionWe carried out high-resolution large-eddy simulations (LESs) to investigate the effects of several separation-control approaches on a NACA4412 wing section with spanwise width of Lz = 0.6 at an…Yuning Wang, Fermin Mallor, Carlos Guardiola et al.·Feb 11, 2025SaveLearn
Numerical Investigation of the Effect of an Oblique Flow Entry on the Pressure Losses in Square ChannelsFlows in square channels are common in applications, such as automotive after-treatment systems and heat exchangers. Flows with axial flow entry are well understood, but for oblique flow entry, there…Callum Samuels, Timothy C. Watling, Svetlana Aleksandrova et al.·Feb 11, 2025SaveLearn
Assessment of non-intrusive sensing in wall-bounded turbulence through explainable deep learningIn this work we present a framework to explain the prediction of the velocity fluctuation at a certain wall-normal distance from wall measurements with a deep-learning model. For this purpose, we…A. Cremades, R. Freibergs, S. Hoyas et al.·Feb 11, 2025SaveLearn
Acoustic microstreaming and shear stress produced by the interaction of an oscillating gas bubble with a viscoelastic particleAn analytical theory is developed that describes acoustic microstreaming produced by the interaction of an oscillating gas bubble with a viscoelastic particle. The bubble is assumed to undergo…Alexander Doinikov, Cyril Mauger, Philippe Blanc-Benon et al.·Feb 11, 2025SaveLearn
The contribution of dilatational motion to energy flux in homogeneous compressible turbulenceWe analyze the energy flux in compressible turbulence by generalizing the exact decomposition recently proposed by Johnson (Phys. Rev. Lett., vol. 124, 2020. 104501) to study incompressible turbulent…Chensheng Luo, Le Fang, Jian Fang et al.·Feb 11, 2025SaveLearn
Effects of Flagellar Morphology on Swimming Performance and Directional Control in MicroswimmersIn a fluid environment, flagellated microswimmers propel themselves by rotating their flagella. The morphology of these flagella significantly influences forward speed, swimming efficiency, and…Baopi Liu, Lu Chen, Wenjun Xu·Feb 11, 2025SaveLearn
Principal Component Analysis and K-Means Clustering of Fuel-Air Mixing in Gas Turbine CombustorsAs a direct consequence of liquid kerosene injection, aeroengine combustors may be categorized as non-premixed combustion systems, characterized by a swirl-stabilized and highly complex flow field.…David Salvador-Jasin, A Duncan Walker, Jon F Carrotte·Feb 11, 2025SaveLearn
Mass Transfer and Pressure Drop Similarities in Oriented, Periodically Confined ChannelsThis study presents a detailed quantification of how flow orientation affects mass transfer and frictional resistance in periodically confined channels, offering novel insights into the physical…Fynn Jerome Aschmoneit·Feb 10, 2025SaveLearn
MPFBench: A Large Scale Dataset for SciML of Multi-Phase-Flows: Droplet and Bubble DynamicsMultiphase fluid dynamics, such as falling droplets and rising bubbles, are critical to many industrial applications. However, simulating these phenomena efficiently is challenging due to the…Mehdi Shadkhah, Ronak Tali, Ali Rabeh et al.·Feb 10, 2025SaveLearn
Lagrangian Attention Tensor Networks for Velocity Gradient Statistical ModelingDirect numerical simulation of turbulence at realistic Reynolds numbers is still beyond current computational capability, necessitating models that reduce the number of resolved spatial scales.…Criston Hyett, Yifeng Tian, Michael Woodward et al.·Feb 10, 2025SaveLearn
Coupled poro-elastic behavior of hyper-elastic membranesThis study investigates the coupled deformation and flow behavior of thin, hyper-elastic, porous membranes subjected to pressure loading. Using bulge test experiments, optical deformation…Alexander Gehrke, Zoe King, Kenneth S. Breuer·Feb 10, 2025SaveLearn
Order and Chaos in Systems of Coaxial Vortex PairsSystems of coaxial vortex pairs in an inviscid flow give rise to complex dynamics, with motions ranging from ordered to chaotic. This complexity arises due to the problem's high nonlinearity and…Christiana Mavroyiakoumou, Wenzheng Shi·Feb 10, 2025SaveLearn
Dynamical relevance of periodic orbits under increasing Reynolds number and connections to inviscid dynamicsLarge numbers of relative periodic orbits (RPOs) have been found recently in doubly-periodic, two-dimensional Kolmogorov flow at moderate Reynolds numbers Re ∈ \40, 100\. While these solutions…Andrew Cleary, Jacob Page·Feb 10, 2025SaveLearn
Laser-induced droplet deformation: curvature inversion explained from instantaneous pressure impulseWe investigate the shape of a tin sheet formed from a droplet struck by a nanosecond laser pulse. Specifically, we examine the dynamics of the process as a function of laser beam properties, focusing…Hugo França, Hermann Karl Schubert, Oscar Versolato et al.·Feb 10, 2025SaveLearn
Integrated Multiphysics Modeling of a Piezoelectric MicropumpThis paper presents an integrated multiphysics simulation approach of piezoelectric micropumps. Micropumps and micro blowers are essential devices in various cutting-edge industries like laboratory…AmirHossein Ghaemi, Abbas Ebrahimi, Majid Hajipour·Feb 10, 2025SaveLearn
Stress field in the vicinity of a bubble/sphere moving in a dilute surfactant solutionIn this study, we experimentally investigate the stress field around a bubble rising in a dilute surfactant solution (20 < Re < 220, high Peclet numbers) whose surface gradually becomes contaminated,…Hiroaki Kusuno, Yoshiyuki Tagawa·Feb 10, 2025SaveLearn
Hydrodynamic and thermodynamic non-equilibrium characteristics of shock waves: Insights from the discrete Boltzmann methodShock waves are typical non-equilibrium phenomena in nature and engineering, driven by hydrodynamic non-equilibrium (HNE) and thermodynamic non-equilibrium (TNE) effects. However, the mechanisms…Dejia Zhang, Yanbiao Gan, Bin Yang et al.·Feb 10, 2025SaveLearn
A pencil-distributed finite-difference solver for extreme-scale calculations of turbulent wall flows at high Reynolds numberWe present a computational method for extreme-scale simulations of incompressible turbulent wall flows at high Reynolds numbers. The numerical algorithm extends a popular method for solving…Rafael Diez Sanhueza, Jurriaan Peeters, Pedro Costa·Feb 10, 2025SaveLearn