Mean-Flow Adjoint Sensitivity Analysis of Unsteady Flow Around Porous Cylinders Using a Homogenized Lattice Boltzmann MethodAdjoint-based sensitivity analysis is an indispensable tool for large-scale fluid-dynamic design and distributed control problems, yet its application to unsteady and turbulent flows is frequently…Shota Ito, Johannes L. Grafen, Fedor Bukreev et al.·Jun 30, 2026SaveLearn
Lagrangian velocity statistics of homogeneous isotropic turbulence in dilute polymer solutionsWe conduct direct numerical simulations of homogeneous isotropic turbulence in dilute polymer solutions to investigate the Lagrangian velocity statistics. We show how polymers modulate the power…Yusuke Koide, Susumu Goto·Jun 30, 2026SaveLearn
New numerical methods for calculating statistical equilibria of two-dimensional turbulent flows, strictly based on the Miller-Robert-Sommeria theoryNew numerical methods are proposed for the mixing entropy maximization problem in the context of Miller-Robert-Sommeria's (MRS) statistical mechanics theory of two-dimensional turbulence,…Koki Ryono, Keiichi Ishioka·Jun 30, 2026SaveLearn
Sparse POD Mode Selection and Manifold Dimensionality Reduction with Neural NetworksLinear dimensionality reduction methods such as proper orthogonal decomposition (POD) make high-dimensional data amenable to analysis by identifying the principal components, or modes, that capture…Tomoki Koike, Prakash Mohan, Marc T. Henry de Frahan et al.·Jun 30, 2026SaveLearn
Linear Kelvin Wave Predictions in the z 0 LimitLinear wave theory captures the essential physics of free-surface flows at a fraction of the computational cost of nonlinear and viscous methods, making it attractive for design, real-time control,…Gabriel D Weymouth·Jun 30, 2026SaveLearn
The HydroGym Reinforcement Learning Platform for Fluid DynamicsModeling and controlling fluids is critical across science and engineering. Effective flow control can increase lift, reduce drag, enhance mixing, and attenuate noise, potentially unlocking new…Christian Lagemann, Sajeda Mokbel, Miro Gondrum et al.·Jun 30, 2026SaveLearn
Nonlinear responses of the premixed V-flame subjected to dual-frequency disturbancesThe two-way interaction between the unsteady flame heat release rate (HRR) and acoustic waves can lead to combustion instability within combustors. Previous studies have typically characterised…Xiaozhen Jiang, Xiaokang Liu, Aimee S. Morgans et al.·Jun 30, 2026SaveLearn
Influence of wind shear and veer on power, thrust, and induction of an actuator diskWind shear and wind veer (gradients of wind speed and direction, respectively) are ubiquitous in the atmospheric boundary layer (ABL), and wind turbines therefore routinely operate in sheared and…Kirby S. Heck, Storm A. Mata, Michael F. Howland·Jun 29, 2026SaveLearn
Electrophoretic motion of a liquid droplet with Brinkman-screened internal hydrodynamicsWe develop a theory for the electrophoresis of a spherical porous liquid droplet with prescribed uniform surface charge. The exterior electrokinetics is governed by the Poisson-Nernst-Planck-Stokes…Sutapa Mandal, Subrata Majhi·Jun 29, 2026SaveLearn
Offline accuracy is not enough: closed-loop instability and stabilisation of a wall-sensor neural estimator in opposition controlOpposition control reduces skin-friction drag by opposing the wall-normal velocity on a near-wall detection plane, but the detection-plane velocity it requires is not available from wall-mounted…Giorgio Maria Cavallazzi, Miguel Pérez-Cuadrado, Alfredo Pinelli·Jun 29, 2026SaveLearn
Sudden expansion stability thresholds modified by lateral flowsWe study the flow in a symmetric three-dimensional confined sudden expansion with lateral inflow at Reynolds number below 300 and varying lateral-to-central flow rate ratio, using experiments, linear…T. Salamon, R. Debuysschère, A. Chafaï et al.·Jun 29, 2026SaveLearn
Efficient Wall-Modeled High-Order Compact Gas-Kinetic Scheme for Compressible Turbulent FlowsScale-resolving simulations of wall-bounded turbulent flows remain prohibitively expensive at high Reynolds numbers, owing to the stringent near-wall resolution requirements. High-order compact…Yaqing Yang, Fengxiang Zhao, Kun Xu·Jun 29, 2026SaveLearn
Exact analytical solutions for the piston effect in supercritical fluids under post-acoustic approximation -- Short-time asymptotics, thermal penetration depth and comparison with the Spacelab D-2 experimentsNear the liquid-vapor critical point, fluids become highly compressible, giving rise to a special, strongly coupled thermo-mechanical process: the piston effect. In this phenomenon, a thin thermal…Mátyás Szücs·Jun 29, 2026SaveLearn
A second-order unified gas-kinetic wave-particle method with enhanced mesh independence for hypersonic flowsBenefiting from the direct modeling of physical laws in a discretized space and the automatic decomposition of the gas distribution function into hydrodynamic waves and particles, the UGKWP method…Junzhe Cao, Rui Zhang, Wenpei Long et al.·Jun 29, 2026SaveLearn
Gappy Reconstruction of Bubbly Flows by Guided Diffusion ModelsExperiments in multiphase flows are often limited in their ability to simultaneously obtain velocity measurements in different phases. At the same time, flow reconstruction from phase-limited…Hridey Narula, Tianyi Li, Michele Buzzicotti et al.·Jun 29, 2026SaveLearn
A Unified Spectrum for Turbulence in Microfluidic FlowWe present a predictive master spectrum describing turbulence-like flows in microfluidic systems. Extending Pao's viscous-range closure, the model introduces (i) an adaptive inertial-range slope…Chit Yau Kuan, Xiaochen Liu, Yi-Ping Ho et al.·Jun 29, 2026SaveLearn
Guided Unconditional and Conditional Generative Models for Super-Resolution and Inference of Quasi-Geostrophic TurbulenceTypically, numerical simulations of Earth systems are coarse, and Earth observations are sparse and gappy. We apply four generative diffusion modeling approaches to super-resolution and inference of…Anantha Narayanan Suresh Babu, Akhil Sadam, Pierre F. J. Lermusiaux·Jun 29, 2026SaveLearn
Kriging and neural network models for pressure losses across perforated platesIn this paper, two novel data-driven models based on kriging and neural networks (NN) are proposed to predict pressure losses across perforated plates with circular perforations in turbulent flows.…Shuai Li·Jun 28, 2026SaveLearn
Monolithic kinetic algorithm for heterogeneous porous media systems using a continuous one-domain approachWe propose a lattice Boltzmann model (LBM) on standard lattices for simulating multi-dimensional, weakly compressible, isothermal flows within and around isotropic heterogeneous porous media. The…Nikita O. Gusev, Ilya V. Karlin·Jun 28, 2026SaveLearn
Single-point statistical moments of the nonhomogeneous stochastic advection equation in the small correlation length limitThis paper presents the derivation of closed-form expressions of the single-point statistical moments of a solution to a nonhomogeneous stochastic advection equation with a linear relaxation. While…Keiko Kircher, Cristian Proistosescu, Ryan L. Sriver·Jun 28, 2026SaveLearn
Triggering of extreme events and coherent-structure modulation in wall-turbulence under cyclostationary forcesAtmospheric gusts expose wall-bounded turbulence to severe unsteady forcing, triggering complex non-equilibrium dynamics and extreme aerodynamic loads. In this study, direct numerical simulations are…Ao Xu, Yun-Qian Bi, Heng-Dong Xi·Jun 28, 2026SaveLearn
Premixed flames in a stagnation point flow under Darcy's lawPremixed flames in stagnation point flows are traditionally described using Navier--Stokes equations where inertia and density variations play an important part in determining the flame structure.…Prabakaran Rajamanickam, Joel Daou·Jun 27, 2026SaveLearn
Quadruple decomposition of boundary vorticity fluxFirst introduced by Lighthill in 1963 for two-dimensional flows and later generalized by Jie-Zhi Wu to three-dimensional scenarios since 1986, the boundary vorticity flux (BVF) is the cornerstone of…Tao Chen, Tianshu Liu·Jun 27, 2026SaveLearn
Confinement-Induced Suppression of Jet Drop Size by Bubble Bursting in Shallow LiquidsBubble bursting is a major source of aerosol generation in a wide range of natural and industrial systems. While the resulting jet dynamics have been extensively studied in deep liquid pools, bubble…Zhengyu Yang, Vatsal Sanjay, C. Ricardo Constante-Amores et al.·Jun 26, 2026SaveLearn
A transition to elasto-viscoplastic turbulence in inertialess channel flow?We conduct 2D numerical simulations employing a widely used constitutive law for elasto-viscoplastic fluids to show that linear instability leads to spatio-temporal complexity in inertialess channel…James D. Shemilt, Neil J. Balmforth, Duncan R. Hewitt·Jun 26, 2026SaveLearn