Large Eddy Simulation of the evolution of the soot size distribution in turbulent nonpremixed bluff body flamesLarge Eddy Simulation (LES) was used to investigate the evolution of the soot size distribution in a series of turbulent nonpremixed bluff body flames, with different bluff body diameters. The new…Hernando Maldonado Colmán, Michael E. Mueller·Feb 7, 2024SaveLearn
Large Eddy Simulation of the evolution of the soot size distribution in turbulent nonpremixed flames using the Bivariate Multi-Moment Sectional MethodA joint volume-surface formalism of the Multi-Moment Sectional Method (MMSM) is developed to describe the evolution of soot size distribution in turbulent reacting flows. The bivariate MMSM (or…Hernando Maldonado Colmán, Michael E. Mueller·Feb 7, 2024SaveLearn
Optimal standoff distance for a highly focused microjet penetrating a soft materialA needle-free injector using a highly focused microjet has the potential to minimize the invasiveness of drug delivery. In this study, the jet penetration depth in a soft material-which is a critical…Daichi Igarashi, Kento Kimura, Nanami Endo et al.·Feb 7, 2024SaveLearn
From zero-mode intermittency to hidden symmetry in random scalar advectionThe statistical behavior of scalars passively advected by random flows exhibits intermittency in the form of anomalous multiscaling, in many ways similar to the patterns commonly observed in…Simon Thalabard, Alexei A. Mailybaev·Feb 6, 2024SaveLearn
Comment on the paper 'Saturation and Multifractality of Lagrangian and Eulerian Scaling Exponents in Three-Dimensional Turbulence'We comment on the paper 'Saturation and Multifractality of Lagrangian and Eulerian Scaling Exponents in Three-Dimensional Turbulence' by D. Buaria and K.R. Sreenivasan. We point out some physical…V. A. Sirota, K. P. Zybin·Feb 6, 2024SaveLearn
Optimal reconstruction of water-waves from noisy pressure measurements at the seabedWe consider the problem of recovering the surface wave profile from noisy bottom pressure measurements with (a priori unknown) arbitrary pressure at the surface. Without noise, the direct…Joris Labarbe, Alexandre Vieira, Didier Clamond·Feb 6, 2024SaveLearn
Analysis of wall-modelled particle/mesh PDF methods for turbulent parietal flowsLagrangian stochastic methods are widely used to model turbulent flows. Scarce consideration has, however, been devoted to the treatment of the near-wall region and to the formulation of a proper…Guilhem Balvet, Jean-Pierre Minier, Yelva Roustan et al.·Feb 6, 2024SaveLearn
Pathologies of low-Froude free-surface flows over smoothed bodiesIn the study of low-speed or low-Froude flows of a potential gravity-driven fluid past a wave-generating object, the traditional asymptotic expansion in powers of the Froude number predicts a…Yyanis Johnson-Llambias, Philippe H. Trinh·Feb 6, 2024SaveLearn
Vortex Stretching of Non-premixed, Diluted Hydrogen/Oxygen FlameletsA three-dimensional flamelet model considering vortex stretching with unitary Lewis number is used to simulate diluted hydrogen-oxygen diffusion flames. Non-reacting nitrogen is used as the diluent…Wes Hellwig, Xian Shi, William A. Sirignano·Feb 6, 2024SaveLearn
A low-dissipation reconstruction scheme for compressible single- and multi-phase flows based on artificial neural networksSolving compressible flows containing both smooth and discontinuous flow structures remains a significant challenge for finite volume methods. Godunov-type finite volume methods are commonly used for…Minsheng Huang, Lidong Cheng, Wenjun Ying et al.·Feb 5, 2024SaveLearn
Extreme statistics and extreme events in dynamical models of turbulenceWe present a study of the intermittent properties of a shell model of turbulence with unprecedented statistics, about 107 eddy turn over time, achieved thanks to an implementation on a…Xander M. de Wit, Giulio Ortali, Alessandro Corbetta et al.·Feb 5, 2024SaveLearn
Transition to chaos and magnetic field generation in rotating Rayleigh-B\'enard convectionHydrodynamic and magnetohydrodynamic convective attractors in three-dimensional rotating Rayleigh-B\'enard convection are studied numerically by varying the Taylor and Rayleigh numbers as control…Dalton N. Oliveira, Roman Chertovskih, Erico L. Rempel et al.·Feb 5, 2024SaveLearn
Explaining the Lack of Mesh Convergence of Inviscid Adjoint Solutions Near Solid Walls for Subcritical FlowsNumerical solutions to the adjoint Euler equations have been found to diverge with mesh refinement near walls for a variety of flow conditions and geometry configurations. The issue is reviewed and…Carlos Lozano, Jorge Ponsin·Feb 5, 2024SaveLearn
Shock equations and jump conditions for the 2D Adjoint Euler equationsThis paper considers the formulation of the adjoint problem in two dimensions when there are shocks in the flow solution. For typical cost functions, the adjoint variables are continuous at shocks,…Carlos Lozano, Jorge Ponsin·Feb 5, 2024SaveLearn
Slip-induced odd viscous flow past a cylinderOdd viscosity is a transport coefficient that can occur when fluids experience breaking of parity and time-reversal symmetry. Previous knowledge indicates that cylinders in incompressible odd viscous…Ruben Lier·Feb 4, 2024SaveLearn
On the local streamline pattern of planar polynomial velocity field with nonzero linear partThe streamline pattern of planar polynomial velocity field is far from fully understood. In the community of fluid mechanics, most studies simply focus on the velocity gradient, or the linear part of…Jian Gao, Hongping Ma, Rong Wang et al.·Feb 4, 2024SaveLearn
Wall-wake laws for the mean velocity and the turbulenceA new wall-wake law is proposed for the streamwise turbulence in the outer region of a turbulent boundary layer. The formulation pairs the logarithmic part of the profile (with a slope A1 and…Alexander J. Smits·Feb 3, 2024SaveLearn
A self-induced mechanism of large-scale helical structures in compressible turbulent flowsA novel self-sustaining mechanism is proposed for large-scale helical structures in compressible turbulent flows. The existence of two channels of subgrid-scale and viscosity terms for large-scale…Zheng Yan, Jianchun Wang, Lifeng Wang et al.·Feb 3, 2024SaveLearn
Measurement of Pressure Gradients near the Interface in the Viscous Fingering InstabilityThe viscous fingering instability, which forms when a less-viscous fluid invades a more-viscous one within a confined geometry, is an iconic system for studying pattern formation. For both miscible…Savannah D. Gowen, Thomas E. Videbaek, Sidney R. Nagel·Feb 2, 2024SaveLearn
Stochastic Suspended Sediment Dynamics in Semi-Bounded Open Channel Flows: A Reflected SDE ApproachStochastic processes, in the form of stochastic differential equations (SDEs), integrate stochastic elements to account for the inherent randomness in sediment particle trajectories in an…Manotosh Kumbhakar, Christina W. Tsai·Feb 2, 2024SaveLearn
An Algebraic Non-Equilibrium Turbulence Model of the High Reynolds Number Transition RegionWe present a mixing length-based algebraic turbulence model calibrated to pipe flow; the main purpose of the model is to capture the increasing turbulence production-to-dissipation ratio observed in…Nils T. Basse·Feb 2, 2024SaveLearn
The chimera revisited: Wall- and magnetically-bounded turbulent flowsThis paper is a first attempt at bringing together various concepts from research on wall- and magnetically-bounded turbulent flows. Brief reviews of both fields are provided: The main similarities…Nils T. Basse·Feb 2, 2024SaveLearn
Criteria for dynamic stall onset and vortex shedding in low Reynolds number flowsDynamic stall at low Reynolds numbers, Re O(104), exhibits complex flow physics with co-existing laminar, transitional, and turbulent flow regions. Current state-of-the-art…Sarasija Sudharsan, Anupam Sharma·Feb 1, 2024SaveLearn
Novel turbulence and coarsening arrest in active-scalar fluidsWe uncover a new type of turbulence -- activity-induced homogeneous and isotropic turbulence in a model that has been employed to investigate motility-induced phase separation (MIPS) in a system of…Nadia Bihari Padhan, Kolluru Venkata Kiran, Rahul Pandit·Feb 1, 2024SaveLearn
Effect of radius ratio on the sheared annular centrifugal turbulent convectionWe perform the linear stability analysis and direct numerical simulations to study the effect of radius ratio on the instability and flow characteristics of the sheared annular centrifugal…Jun Zhong, Junyi Li, Chao Sun·Feb 1, 2024SaveLearn