Settling dynamics of non-Brownian suspension of spherical and cubic particles in Stokes flowThe present study investigates the gravity-driven settling dynamics of non-Brownian suspensions of spherical and cubic particles within a triply periodic domain. The effect of solid volume fraction…Dipankar Kundu, Florencio Balboa Usabiaga, Marco Ellero·Jan 14, 2025SaveLearn
Scaling of wall-pressure--velocity correlations in high Reynolds number turbulent pipe flowAn experimental study was conducted in the CICLoPE long-pipe facility to investigate the correlation between wall-pressure and turbulent velocity fluctuations in the logarithmic region, at high…Giulio Dacome, Lorenzo Lazzarini, Alessandro Talamelli et al.·Jan 14, 2025SaveLearn
From directed percolation to patterned turbulenceThe transition to turbulence is characterized by an abrupt loss of order and predictability, featuring the intermittent proliferation and decay of localized turbulent structures. En-route to becoming…Roger Ayats, Lukasz Klotz, Björn Hof·Jan 14, 2025SaveLearn
Casting Computational Fluid Mechanics into a Convex Quadratic Optimization FrameworkWe employ the principle of minimum pressure gradient to transform problems in unsteady computational fluid dynamics (CFD) into a convex optimization framework subject to linear constraints. This…Hussam Sababha, Haithem Taha, Mohammed Daqaq·Jan 14, 2025SaveLearn
Advanced representation learning for flow field analysis and reconstructionIn this paper we present advanced representation learning study on integrating deep learning techniques and sparse approximation, including diffusion models, for advanced flow field analysis and…Yikai Wang, Jiameng Wang, Ruyi Han et al.·Jan 14, 2025SaveLearn
The route to turbulence in magnetohydrodynamic square duct flowThe transition route from laminar to turbulent flow in a magnetohydrodynamic (MHD) duct with a square cross-section is investigated in the limit of low magnetic Reynolds number. In the presence of a…Mattias Brynjell-Rahkola, Yohann Duguet, Thomas Boeck·Jan 14, 2025SaveLearn
Analytic Solution of the N-Dimensional Incompressible Navier-Stokes EquationsThis paper presents an analytic solution of the incompressible Navier-Stokes equations as recurrence relations for the solution's derivatives, addressing the Clay Mathematics Institute's Millennium…Nathan Strange·Jan 13, 2025SaveLearn
Non-unique self-similar blowups in shell models: insights from dynamical systems and machine-learningStrong numerical hints exist in favor of a universal blowup scenario in the Sabra shell model, a popular cascade model of 3D turbulence, which features complex velocity variables on a geometric…Ciro Campolina, Eric Simonnet, Simon Thalabard·Jan 13, 2025SaveLearn
Nonequilibrium Continuous Transition in a Fast Rotating TurbulenceWe study the saturation of three-dimensional unstable perturbations on a fast rotating turbulent flow using direct numerical simulations (DNSs). Under the effect of Kolmogorov forcing, a transition…Chandra Shekhar Lohani, Suraj Kumar Nayak, Kannabiran Seshasayanan et al.·Jan 13, 2025SaveLearn
Symmetry-Breaking of Turbulent Flow in Periodic Porous Media at Intermediate PorositiesThis paper presents a novel discovery of a symmetry-breaking effect in porous media with porosity between 0.8-0.9, which we are referring to as the intermediate porosity flow regime. Using large eddy…Vishal Srikanth, Andrey V Kuznetsov·Jan 13, 2025SaveLearn
The Harmonic Pitching NACA 0018 Airfoil in Low Reynolds Number FlowThis study investigates the aerodynamic performance of the symmetric NACA 0018 airfoil under harmonic pitching motions at low Reynolds numbers, a regime characterized by the presence of laminar…Krzysztof Rogowski, Maciej Śledziewski, Jan Michna·Jan 12, 2025SaveLearn
Elasto-visco-plastic flows in benchmark geometries: II. Flow around a Confined CylinderWe examine computationally the two-dimensional flow of elastoviscoplastic (EVP) fluids around a cylinder symmetrically placed between two plates parallel to its axis. The Saramito-Herschel-Bulkley…Milad Mousavi, Yannis Dimakopoulos, John Tsamopoulos·Jan 11, 2025SaveLearn
CNN-powered micro- to macro-scale flow modeling in deformable porous mediaThis work introduces a novel application for predicting the macroscopic intrinsic permeability tensor in deformable porous media, using a limited set of micro-CT images of real microgeometries. The…Yousef Heider, Fadi Aldakheel, Wolfgang Ehlers·Jan 11, 2025SaveLearn
Molecular Fluctuations Inhibit Intermittency in Compressible TurbulenceIn the standard picture of fully-developed turbulence, highly intermittent hydrodynamic fields are nonlinearly coupled across scales, where local energy cascades from large scales into dissipative…Ishan Srivastava, Andrew J. Nonaka, Weiqun Zhang et al.·Jan 11, 2025SaveLearn
OpenFOAMGPT: a RAG-Augmented LLM Agent for OpenFOAM-Based Computational Fluid DynamicsThis work presents a large language model (LLM)-based agent OpenFOAMGPT tailored for OpenFOAM-centric computational fluid dynamics (CFD) simulations, leveraging two foundation models from OpenAI: the…Sandeep Pandey, Ran Xu, Wenkang Wang et al.·Jan 10, 2025SaveLearn
Multi-time scale-invariance of turbulence in a shell modelWhen time and velocities are dynamically rescaled relative to the instantaneous turnover time, the Sabra shell model acquires another (hidden) form of scaling symmetry. It has been previously shown…Alexei A. Mailybaev·Jan 10, 2025SaveLearn
Simulation and modelling of convective mixing of carbon dioxide in geological formationsWe perform large-scale numerical simulations of convection in 3D porous media at Rayleigh-Darcy numbers up to Ra=8×104. To investigate the convective mixing of carbon dioxide (CO2) in…Marco De Paoli, Francesco Zonta, Lea Enzenberger et al.·Jan 10, 2025SaveLearn
Advection-based multiframe iterative correction for pressure estimation from velocity fieldsA novel method to improve the accuracy of pressure field estimation from time-resolved Particle Image Velocimetry data is proposed. This method generates several new time-series of velocity field by…Junwei Chen, Marco Raiola, Stefano Discetti·Jan 10, 2025SaveLearn
How far does the influence of the free surface extend in turbulent open channel flow?Turbulent open channel flow is known to feature a multi-layer structure near the free surface. In the present work we employ direct numerical simulations considering Reynolds numbers up to…Christian Bauer, Yoshiyuki Sakai, Markus Uhlmann·Jan 10, 2025SaveLearn
Full-domain POD modes from PIV asynchronous patchesA method is proposed to obtain full-domain spatial modes based on Proper Orthogonal Decomposition (POD) of Particle Image Velocimetry (PIV) measurements performed at different (overlapping) spatial…Iacopo Tirelli, Adrian Grille Guerra, Andrea Ianiro et al.·Jan 10, 2025SaveLearn
Channel deformations during elastocapillary spreading of gaseous embolisms in biomimetic leavesThe nucleation and/or spreading of bubbles in water under tension (due to water evaporation) can be problematic for most plants along the ascending sap network from root to leaves, named xylem. Due…François-Xavier Gauci, Ludovic Jami, Ludovic Keiser et al.·Jan 10, 2025SaveLearn
Far-Field Aeroacoustic Shape Optimization Using Large Eddy SimulationThis study presents a shape optimization framework that combines a Flux Reconstruction (FR) spatial discretization, Large Eddy Simulation (LES), the Ffowcs-Williams and Hawkings (FW-H) formulation,…Mohsen Hamedi, Brian Vermeire·Jan 10, 2025SaveLearn
To jump or not to jump: Adhesion and viscous dissipation dictate the detachment of coalescing wall-attached bubblesBubble coalescence can promote bubble departure at much smaller sizes compared to buoyancy. This can critically enhance the efficiency of gas-evolving electrochemical processes, such as water…Çayan Demirkır, Rui Yang, Aleksandr Bashkatov et al.·Jan 9, 2025SaveLearn
Modal Force Partitioning -- A Method for Determining the Aerodynamic Loads for Decomposed Flow Modes with Application to Aeroacoustic NoiseAerodynamic loads play a central role in many fluid dynamics applications, and we present a method for identifying the structures (or modes) in a flow that make dominant contributions to the…Suryansh Prakhar, Jung-Hee Seo, Rajat Mittal·Jan 9, 2025SaveLearn
Multiscale discrete Maxwell boundary condition for the discrete unified gas kinetic scheme for all Knudsen number flowsIn this paper, a multiscale boundary condition for the discrete unified gas kinetic scheme (DUGKS) is developed for gas flows in all flow regimes. Based on the discrete Maxwell boundary condition…Ziyang Xin, Yue Zhang, Chuang Zhang et al.·Jan 9, 2025SaveLearn