Integrating Discrete Sub-grid Filters with Discretization-Corrected Particle Strength Exchange Method for High Reynolds Number Flow SimulationsWe present a discrete filter for subgrid-scale (SGS) model, coupled with the discretization corrected particle strength exchange (DC-PSE) method for the simulation of three-dimensional viscous…Anas Obeidat·Apr 16, 2024SaveLearn
1D solutions for compressible two-phase flows in a heated and cooled duct: mechanical equilibriumAnalytical/quasi-analytical solutions are proposed for a steady, compressible, two-phase flow in mechanical equilibrium in a rectilinear duct subjected to heating followed by cooling. The flow is…Solène Schropff, Fabien Petitpas, Eric Daniel·Apr 16, 2024SaveLearn
Investigations on Projection-Based Reduced Order Model Development for Rotating Detonation EngineThe current study aims to evaluate and investigate the development of projection-based reduced-order models (ROMs) for efficient and accurate RDE simulations. Specifically, we focus on assessing the…Ryan Camacho, Cheng Huang·Apr 16, 2024SaveLearn
Onsager's "Ideal Turbulence" TheoryLars Onsager in 1945-1949 made an exact analysis of the high Reynolds-number limit for individual turbulent flow realizations modeled by incompressible Navier-Stokes equations, motivated by…Gregory Eyink·Apr 15, 2024SaveLearn
Synchronous PIV measurements of a self-powered blood turbine and pump couple for right ventricle supportA blood turbine-pump system (iATVA), resembling a turbocharger was proposed as a mechanical right-heart assist device without external drive power. In this study, the iATVA system is investigated…Kagan Ucak, Faruk Karatas, Emre Cetinkaya et al.·Apr 15, 2024SaveLearn
Pair statistics of oblate spheroids settling in a turbulent flowWe perform direct numerical simulations of sub-Kolmogorov, inertial spheroids settling under gravity in homogeneous, isotropic turbulence and find that small-scale clustering, measured via the…Prateek Anand, Samriddhi Sankar Ray·Apr 15, 2024SaveLearn
Turbulent ice-ocean boundary layers in the well-mixed regime: insights from direct numerical simulationsThe meltwater mixing line (MML) model provides a theoretical prediction of near-ice water mass properties that is useful to compare with observations. If oceanographic measurements reported in a…Louis-Alexandre Couston·Apr 15, 2024SaveLearn
From laminar to chaotic flow via stochastic resonance in viscoelastic channel flowRecent research indicates that low-inertia viscoelastic channel flow experiences supercritical non-normal mode elastic instability from laminar to sustained chaotic flow due to finite-size…Yuke Li, Victor Steinberg·Apr 15, 2024SaveLearn
Threshold Current Density for Diffusion-controlled Stability of Electrolytic Surface NanobubblesUnderstanding the stability mechanism of surface micro/nanobubbles adhered to gas-evolving electrodes is essential for improving the efficiency of water electrolysis, which is known to be hindered by…Yixin Zhang, Xiaojue Zhu, Jeffery A. Wood et al.·Apr 14, 2024SaveLearn
Surfactant-laden bubble bursting: dynamics of capillary waves and Worthington jet at large Bond numberWe present a numerical study of the main sub-stages preceding aerosol formation via bursting bubbles: capillary wave propagation along the bubble, convergence at the bubble's apex, the ascent of a…Paula Pico, Lyes Kahouadji, Seungwon Shin et al.·Apr 14, 2024SaveLearn
Data-driven turbulence modelingThis chapter provides an introduction to data-driven techniques for the development and calibration of closure models for the Reynolds-Averaged Navier--Stokes (RANS) equations. RANS models are the…Paola Cinnella·Apr 13, 2024SaveLearn
Using Biot-Savart boundary conditions for unbounded external flow on Eulerian meshesWe introduce a novel boundary condition for incompressible Eulerian simulations formulated using a Biot-Savart vorticity integral that maintains high-accuracy results even when the domain boundary is…Gabriel D. Weymouth, Marin Lauber·Apr 13, 2024SaveLearn
Order-lifted data inversion/retrieval method of neighbor cells to implement general high-order schemes in unstructured-mesh-based finite-volume solution frameworkThis study introduces an order-lifted inversion/retrieval method for implementing high-order schemes within the framework of an unstructured-mesh-based finite-volume method. This method defines a…Hao Guo, Peixue Jiang, Xiaofeng Ma et al.·Apr 13, 2024SaveLearn
Assessment of a Multiphase Formulation of One-Dimensional Turbulence using Direct Numerical Simulation of a Decaying Turbulent Interfacial FlowThe interaction between turbulence and surface tension is studied numerically using the one-dimensional-turbulence (ODT) model. ODT is a stochastic model simulating turbulent flow evolution along a…A. Movaghar, R. Chiodi, M. Oevermann et al.·Apr 13, 2024SaveLearn
Flattening-off of droplet bouncing trend under high ambient gas pressuresIt was previously observed that colliding liquid droplets in a gaseous medium tend to bounce off at elevated gas pressure up to about 12 atm. In this letter, we extended the droplet collision…C. Zhang, Z. Zhang, P. Zhang et al.·Apr 13, 2024SaveLearn
Causal analysis of inner and outer motions in near-wall turbulenceIn this work, we study the causality of near-wall inner and outer turbulent motions. The inner motions are defined as the self-sustained near-wall cycle, and the outer motions as those living in the…Jingxuan Zhang, Zhengping Zhu, Limin Wang et al.·Apr 13, 2024SaveLearn
Energy stability of magnetohydrodynamic flow in channels and ductsWe study the energy stability of pressure-driven laminar magnetohydrodynamic flow in a rectangular duct with transverse homogeneous magnetic field and electrically insulating walls. For sufficiently…Thomas Boeck, Mattias Brynjell-Rahkola, Yohann Duguet·Apr 12, 2024SaveLearn
Advancing aortic stenosis assessment: validation of fluid-structure interaction models against 4D flow MRI dataSystematic in vivo validations of computational models of the aortic valve remain scarce, despite successful validation against in vitro data. Utilizing a combination of computed tomography and 4D…Alberto Zingaro, Irmantas Burba, David Oks et al.·Apr 12, 2024SaveLearn
Data-driven stabilization of an oscillating flow with LTI controllersThis paper presents advances towards the data-based control of periodic oscillator flows, from their fully-developed regime to their equilibrium stabilized in closed-loop, with linear time-invariant…W. Jussiau, C. Leclercq, F. Demourant et al.·Apr 12, 2024SaveLearn
Transitions near the onset of stationary rotating magnetoconvection: role of magnetic Prandtl numberWe investigate the instabilities and associated bifurcation structure near the onset of rotating magnetoconvection of low Prandtl number fluids by performing three dimensional direct numerical…Snehashish Sarkar, Sutapa Mandal, Pinaki Pal·Apr 12, 2024SaveLearn
PiRD: Physics-informed Residual Diffusion for Flow Field ReconstructionThe use of machine learning in fluid dynamics is becoming more common to expedite the computation when solving forward and inverse problems of partial differential equations. Yet, a notable challenge…Siming Shan, Pengkai Wang, Song Chen et al.·Apr 12, 2024SaveLearn
Direct numerical simulations of microlayer formation during heterogeneous bubble nucleationIn this article, we present direct numerical simulation results for the expansion of spherical cap bubbles attached to a rigid wall due to a sudden drop in the ambient pressure. The critical pressure…Mandeep Saini, Xiang Bin Chen, Stephane Zaleski et al.·Apr 12, 2024SaveLearn
On the Control of a Leading-Edge Vortex & its Liftoff on a Cranked, Swept Back WingThis study examines flow over a cranked λ-wing model with a sweep of =60 of the inboard leading edge (LE) that changed to =30 outboard of the crank. The study…H. Kalyankar, L. Taubert, I. Wygnanski·Apr 12, 2024SaveLearn
Minimization Principle for Analytical Solution of Turbulent Flow in ChannelThe analytical solution for turbulent flow in channel presented in Fedoseyev (2023), described the mean turbulent flow velocity as a superposition of the laminar (parabolic) and turbulent…Alex Fedoseyev·Apr 11, 2024SaveLearn
Richtmyer-Meshkov Instability at high Mach Number: Non-Newtonian EffectsThe Richtmyer-Meshkov instability (RMI) occurs when a shock wave passes through an interface between fluids of different densities, a phenomenon prevalent in a variety of scenarios including…Usman Rana, Thomas Abadie, David Chapman et al.·Apr 11, 2024SaveLearn