Newtonian fluid invasion into a Yield-Stress Fluid-Saturated MediumWe investigate pressure imposed two-phase flows in porous media where a Newtonian fluid displaces an immiscible Bingham yield-stress fluid. Using a pore-network model, we identify invasion patterns…Nathan Abitbol, Alex Hansen, Alberto Rosso et al.·Sep 11, 2026SaveLearn
Gas-liquid stratified MHD flows in inclined rectangular ductsThis study investigates fully developed stratified gas/liquid magnetohydrodynamic (MHD) flow of an electrically conducting liquid and a nonconducting gas in inclined rectangular ducts subjected to a…Subham Pal, Ilya Barmak, Arseniy Parfenov et al.·Sep 11, 2026SaveLearn
Diffusion Enhancement and Directional Suppression Induced by Reciprocal FlowsReciprocal flows repeatedly return fluid elements to their initial positions, producing no net advective transport on time average. Nevertheless, their interplay with diffusion gives rise to…Yuki Koyano, Hiroyuki Kitahata, Takeshi Ooshida·Sep 11, 2026SaveLearn
Single-eddy contributions to streamwise velocity variance in turbulent pipe flow. Part 1. The single-eddy intensity functionTownsend's attached-eddy hypothesis explains the asymptotic statistics of wall turbulence through a superposition of self-similar attached eddies. At a given observation location, active portions…Jinyul Hwang·Sep 11, 2026SaveLearn
Spreading dynamics of a drop of yield-stress fluid subject to vertical oscillationsThe measurement of rheological properties from non-idealised flows is routinely used to characterise yield-stress materials. We extend the canonical slump test, which evaluates yield stress based on…Alice Woodbridge, Claudio P. Fonte, Anne Juel·Sep 10, 2026SaveLearn
Transferable Low-Dimensional Representations of Aircraft Surface FieldsAnalyzing flow fields on aerodynamic surfaces is critical to designing next-generation aircraft. Raw computational representations are high-dimensional and costly for complex three-dimensional…Francis G. VanGessel, Cashen Diniz, Mark Fuge·Sep 10, 2026SaveLearn
A Conservative Hybrid Eulerian-Lagrangian Method with Persistent Structure Tracking for Multiscale CavitationHybrid Eulerian Lagrangian methods for multiscale cavitation represent grid resolved vapor structures in an Eulerian formulation and unresolved bubbles in a Lagrangian description, requiring…Mahdi Lavari, Aswin Gnanaskandan·Sep 10, 2026SaveLearn
Surface gravity wave-mean flow interaction with comparable spatial scales. Part II: two-way coupling and wave-wave interactionsWe consider narrow-band deep-water surface gravity waves propagating above a background flow whose spatial scale is comparable to the wavelength. We focus on the regime where the background-flow…Basile Gallet·Sep 10, 2026SaveLearn
Surface gravity wave-mean flow interaction with comparable spatial scales. Part I: reduced wave equationsWe consider deep-water surface gravity waves propagating above a background flow whose spatial scale is comparable to the wavelength, focusing on the regime where the flow is slow compared to the…Basile Gallet, Alexandre Tlili·Sep 10, 2026SaveLearn
Low inertia limit of elasto-inertial turbulencePipe and channel flows of viscoelastic fluids display chaotic dynamics at unusually low speeds, a phenomenon referred to as elasto-inertial turbulence, EIT. First reported in experiments a century…Shoaib Kamil, Sarath Sankar Suresh, Jose M. Lopez et al.·Sep 10, 2026SaveLearn
DiffSWE2d: a differentiable Shallow Water Equations solver for end-to-end flood and tsunami modellingSolving inverse and optimisation problems with traditional shallow water equations (SWE) solvers can be computationally expensive, particularly when gradients with respect to model inputs or…Zhonghou Xu·Sep 10, 2026SaveLearn
A Novel Multi-fidelity Surrogate for Efficient Turbine Design OptimizationTo solve the turbine design optimization problems efficiently, surrogate-based optimization (SBO) algorithms are frequently used. To further reduce the cost of turbine design, the multi-fidelity…Qineng Wang, Liming Song, Zhendong Guo et al.·Sep 10, 2026SaveLearn
A Novel Multi-fidelity Surrogate for Turbomachinery Design OptimizationTurbomachinery design optimization involves expensive black-box problems. Sample-efficient multi-fidelity optimization (MFO) offers an efficient solution. By utilizing multi-fidelity surrogates…Qineng Wang, Liming Song, Zhendong Guo et al.·Sep 10, 2026SaveLearn
Correlative effects of induced magnetic field-buoyancy on reactive solute dispersion dynamics in couple-stress fluidsWe investigate the dispersion of a reactive solute in a couple-stress fluid flowing between two parallel plates under the combined effects of pressure-driven flow, buoyancy, and an induced magnetic…Aritra Roy, Debabrata Das, Pranab Kumar Mondal·Sep 10, 2026SaveLearn
Statistical Turbulence and High-Fidelity Disturbance Fields for Quadrotor Flight ControlReinforcement-learning quadrotor controllers are usually trained under simplified wind models, yet the impact of wind-field fidelity, as opposed to magnitude, on policy robustness remains…Xun Huang·Sep 9, 2026SaveLearn
Giesekus Stick-Slip Singularity: Asymptotic Theory in the Log-Conformation FormulationIn this paper, the log-conformation reformulation of a Giesekus fluid near a planar stick-slip singularity is investigated analytically. In what is, to our knowledge, the first use of the…Florian Becker, Philipp Knechtges·Sep 9, 2026SaveLearn
Long interfacial internal waves with currents: current profiles with quadratic depth-dependenceInternal waves often propagate in the presence of currents. Internal waves and currents are widespread in the world's oceans. The equatorial internal waves and the equatorial undercurrent (EUC)…Conor T. Curtin, Rossen I. Ivanov·Sep 9, 2026SaveLearn
Mixing dynamics and transport mechanisms during laminar stirring flowsWe investigate laminar mixing of a passive dye in an infinite, two-dimensional domain filled with a Newtonian fluid by simulating a cylindrical stirrer that rotates at constant speed along a circular…Mohammad Reza Daneshvar Garmroodi, Ida Karimfazli·Sep 9, 2026SaveLearn
A Robust All-Mach Six-Equation Diffuse-Interface Method for Multiphase Flows with Surface TensionA robust finite-volume framework is presented for the simulation of compressible multiphase flows with surface tension across a wide range of Mach numbers. The method is based on a two-pressure,…Ghanshyam Bharate, J. C. Mandal·Sep 9, 2026SaveLearn
An exposition on some viscosity dependent issues in refined potential flow theoryThis study evaluates viscosity-dependent limitations in refined potential flow theory (RPT) applied to incompressible flow over an impulsively started circular cylinder. RPT adapts classical…Taofiq Omoniyi Amoloye, Leke Thaddeus Oladimeji, Mahmoud A. Hayajnh et al.·Sep 9, 2026SaveLearn
Dynamic Reduced-Order Data Assimilation from Sparse Velocity MeasurementsWe present a novel reduced-order data assimilation framework, termed Reduced-Order Dynamical Assimilation (RODAS), for reconstructing high-resolution, time-resolved flow fields from sparse velocity…Mauricio Portilla, Felipe Galarce, Ernesto Castillo et al.·Sep 9, 2026SaveLearn
The effects of surfactant solubility on inertial Marangoni flow: theory and numericsSurface active agents (surfactants) are common contaminants found on most air-liquid interfaces. Surfactants lower the surface tension, and hence surfactant concentration gradients generate surface…Jun Eshima, Luc Deike, Howard A. Stone·Sep 9, 2026SaveLearn
A stochastic modeling framework to generate 2-D rough-wall high-Reynolds-number turbulent boundary layersAtmospheric surface layer flows are computationally challenging, predominantly due to surface roughness and the high Reynolds number, both of which demand exceptionally high spatial resolution in the…Roozbeh Ehsani, Michele Guala·Sep 9, 2026SaveLearn
Stable, Compact, and Direct Ghost-Cell Reconstruction: A Non-Iterative Approach for Embedded-Boundary MethodsA direct, analytical, non-iterative ghost-cell reconstruction framework is developed for Cartesian-grid embedded-boundary methods. Analytical expressions impose Dirichlet and Neumann boundary…Narsimha Reddy Rapaka, Pankaj Jagad, Yacine Addad et al.·Sep 9, 2026SaveLearn
Macroscale vortex impingement at a porous-fluid interface induces local heat-transfer enhancementExternally generated wakes can impinge on porous layers in several practical heat transfer applications. However, the transport of these macroscale vortices and their resulting influence on heat…Thibaut K. Kemayo, Vishal Srikanth, Justin Courter et al.·Sep 9, 2026SaveLearn