A parametric study of the pipeline hammer phenomenon in plastic Bingham slurry flows using the finite element methodWe conduct a numerical study of the transient phenomenon in pipelines transporting plastic Bingham slurry flows, using a lowest-order finite element method (FEM). While most pipeline hammer studies…Felipe Galarce, Francisco Martinez·Feb 2, 2025SaveLearn
Pulsatility delays the transition to sustained turbulence in quasi-two-dimensional shear flowsThis work investigates efficient routes to turbulence in quasi-two-dimensional shear flows. Two-dimensional disturbances require high Reynolds numbers to incite transition from a steady base flow, as…Christopher J. Camobreco, Alban Pothérat, Gregory J. Sheard·Feb 1, 2025SaveLearn
Fourth-order statistical moments of the velocity gradient tensor in homogeneous, isotropic turbulenceA compact expression of fourth-order statistical moments of the velocity gradient tensor in homogeneous, isotropic, incompressible turbulence is obtained as a function of its invariants and of…Juan Hierro, César Dopazo·Feb 1, 2025SaveLearn
Boundary conditions for probability density function transport equations in fluid mechanicsThe behavior of the probability density function (PDF) transport equation at the limits of the probability space is studied from the point of view of fluid mechanics. Different boundary conditions…Luis Valiño, Juan Hierro·Feb 1, 2025SaveLearn
Defining the mean turbulent boundary layer thickness based on streamwise velocity skewnessA new statistical definition for the mean turbulent boundary layer thickness is introduced, based on identification of the point where the streamwise velocity skewness changes sign, from negative to…Mitchell Lozier, Rahul Deshpande, Ahmad Zarei et al.·Jan 31, 2025SaveLearn
Experimental Investigation of Vortex Shedding in Superfluid 4HeDuring this internship, the starting vortex and its shedding from the trailing edge of an airfoil moving at constant acceleration in 4He has been studied. The airfoil has an angle of attack of…Brichet Lyse·Jan 31, 2025SaveLearn
Computational Assessment of Hemodynamics in Asymmetric-type Lesion of Idealized Coronary StenosesCoronary artery stenosis, characterized by the narrowing of the lumen, significantly affects blood flow and contributes to the progression of cardiovascular diseases. This study investigates the…Ayodele Oyejide, Oluwatosin Abodunrin, Ebenezer Ige et al.·Jan 31, 2025SaveLearn
Marangoni-driven flow instability accelerates liquid-solid contact on atomically smooth micaA droplet falling toward a solid surface displaces the surrounding air until it encounters a defect, and contact nucleates. On atomically smooth surfaces devoid of defects, contact can be delayed…Octave Castanedo, John M. Kolinski·Jan 31, 2025SaveLearn
An advanced fully-implicit solver for heterogeneous porous media based on foam-extendThe study of multiphase flows in porous media is fundamental to various fields, including oil recovery, CO2 sequestration, hydrogeology, and others. Accurate predictions of fluid behavior in these…Roberto Lange, Gabriel M. Magalhães, Franciane F. Rocha et al.·Jan 31, 2025SaveLearn
Relationship between the power spectral density of the Lagrangian velocity and the hierarchy of coherent vortices in turbulenceWe conduct direct numerical simulations of developed turbulence in a periodic cube to investigate the formation mechanism of the power spectral density of the Lagrangian velocity. We compare the…Yusuke Koide, Susumu Goto·Jan 31, 2025SaveLearn
Plane-Symmetric Capillary Turbulence: Five-Wave InteractionsThe theory of isotropic capillary turbulence was developed in the late 1960s by Zakharov and Filonenko. To date, the analytical solution of the kinetic equation describing the stationary transfer of…E. A. Kochurin, P. A. Russkikh·Jan 31, 2025SaveLearn
Starting vortex strength in an impulsively started airfoilThis work characterises the starting vortex and unsteady shear layer generated by an impulsively started National Advisory Committee for Aeronautics 0010 (NACA 0010) airfoil at angles of attack…Anushka Goyal, Jovan Nedic·Jan 31, 2025SaveLearn
Comparison of Lubrication Theory and Stokes Flow in Corner Geometries with Flow SeparationThe Reynolds equation from lubrication theory and the Stokes equations for zero Reynolds number flows are distinct models for an incompressible fluid with negligible inertia. Here we investigate the…Sarah Dennis, Thomas G. Fai·Jan 30, 2025SaveLearn
Magnetically assisted vorticity production in decaying acoustic turbulenceWe study vorticity production in isothermal, subsonic, acoustic (nonvortical), and decaying turbulence due to the presence of magnetic fields. Using three-dimensional numerical simulations, we find…Axel Brandenburg, Evan Scannapieco·Jan 30, 2025SaveLearn
A weakly compressible SPH method for RANS simulation of wall-bounded turbulent flowsThis paper presents a Weakly Compressible Smoothed Particle Hydrodynamics (WCSPH) method for solving the two-equation Reynolds-Averaged Navier-Stokes (RANS) model. The turbulent wall-bounded flow…Feng Wang, Zhongguo Sun, Xiangyu Hu·Jan 30, 2025SaveLearn
Enhanced State Estimation for turbulent flows combining Ensemble Data Assimilation and Machine LearningA novel strategy is proposed to improve the accuracy of state estimation and reconstruction from low-fidelity models and sparse data from sensors. This strategy combines ensemble Data Assimilation…Miguel M. Valero, Marcello Meldi·Jan 30, 2025SaveLearn
Statistical Estimates for 2D stochastic Navier-Stokes EquationsThe statistical features of homogeneous, isotropic, two-dimensional stochastic turbulence are discussed. We derive some rigorous bounds for the mean value of the bulk energy dissipation rate…Anuj Kumar, Ali Pakzad·Jan 30, 2025SaveLearn
The origin of vorticity in viscous incompressible flowsIn inviscid, incompressible flows, the evolution of vorticity is exactly equivalent to that of an infinitesimal material line-element, and hence vorticity can be traced forward or backward in time in…Tianrui Xiang, Gregory L. Eyink, Tamer A. Zaki·Jan 29, 2025SaveLearn
Consistent continuum equations and numerical benchmarks for a perturbation-based, variable-coefficient acoustofluidic solverWe present a consistent continuum framework and a variable-coefficient acoustofluidic solver to analyze acoustic streaming. A perturbation approach is used to split the compressible Navier-Stokes…Khemraj Gautam Kshetri, Amneet Pal Singh Bhalla, Nitesh Nama·Jan 29, 2025SaveLearn
On the applicability of the actuator line method for unsteady aerodynamicsA linear theory for unsteady aerodynamic effects of the actuator line method (ALM) was developed. This theory is validated using two-dimensional ALM simulations, where we compute the unsteady lift…Elías Alva, Vitor G. Kleine, André V. G. Cavalieri·Jan 29, 2025SaveLearn
Flow Structures Beneath Stationary Waves with Constant Vorticity Over Variable TopographyThe flow structures beneath waves have received significant attention from both theoretical and numerical perspectives. Most studies on this topic assume a flat bottom, leading to questions about the…L. G. Martins, M. V. Flamarion, R. Ribeiro-Jr·Jan 29, 2025SaveLearn
Hovering of an actively driven fluid-lubricated foilInspired by recent experimental observations of a harmonically excited elastic foil hovering near a wall while supporting substantial weight, we develop a theoretical framework that describes the…Stephane Poulain, Timo Koch, L. Mahadevan et al.·Jan 28, 2025SaveLearn
The fluid dynamics of liquid mushroomsDroplets that impact the surface of a deep liquid pool may form a vertical jet after the cavity formation event, provided they have sufficient impact energy. Depending on the associated time scales…Akshay Manoj Bhaskaran, Arnov Paul, Apurba Roy et al.·Jan 28, 2025SaveLearn
Lateral migration and bouncing of a deformable bubble rising near a vertical wall. Part 2. Highly inertial regimesThe fate of deformable buoyancy-driven bubbles rising near a vertical wall under highly inertial conditions is investigated numerically. In the absence of path instability, simulations reveal that…Pengyu Shi, Jie Zhang, Jacques Magnaudet·Jan 28, 2025SaveLearn
Hydrodynamics of In-Canopy Flow in Synthetically Generated Coral Reefs Under Oscillatory Wave MotionThe interaction of oscillatory wave motion with morphologically complex coral reefs showcases a wide range of consequential hydrodynamic responses within the canopy. While a large body of literature…Akshay Patil, Clara García-Sánchez·Jan 28, 2025SaveLearn