Structured Input-Output Modeling and Robust Stability Analysis of Compressible FlowsThe recently introduced structured input-output analysis is a powerful method for capturing nonlinear phenomena associated with incompressible flows, and this paper extends that method to the…Diganta Bhattacharjee, Talha Mushtaq, Peter Seiler et al.·Jul 20, 2024SaveLearn
Hidden mechanism of dynamic large-eddy simulation modelsThe dynamic model is one of the most successful inventions in subgrid-scale (SGS) modeling as it alleviates many drawbacks of the static coefficient SGS stress models. The model coefficient is often…Xiaohan Hu, Keshav Vedula, George Ilhwan Park·Jul 20, 2024SaveLearn
Computing Stokes flows in periodic channels via rational approximationRational approximation has proven to be a powerful method for solving two-dimensional (2D) fluid problems. At small Reynolds numbers, 2D Stokes flows can be represented by two analytic functions,…Yidan Xue·Jul 20, 2024SaveLearn
Natural convection in the cytoplasm: Theoretical predictions of buoyancy-driven flows inside a cellThe existence of temperature gradients within eukaryotic cells has been postulated as a source of natural convection in the cytoplasm, i.e. bulk fluid motion as a result of…Nikhil Desai, Weida Liao, Eric Lauga·Jul 19, 2024SaveLearn
Simulation Method of Microscale Fluid-Structure Interactions: Diffuse-Resistance-Domain ApproachDirect numerical simulations (DNS) of microscale fluid-structure interactions (mFSI) in multicomponent multiphase flows pose many challenges, including the thermodynamic consistency of multiphysics…Min Gao, Zhihao Li, Xinpeng Xu·Jul 19, 2024SaveLearn
On the streamwise velocity variance in the near-wall region of turbulent flowsWe study the behaviour of the streamwise velocity variance in turbulent wall-bounded flows using a DNS database of pipe flow up to Reτ ≈ 12000. The analysis of the spanwise spectra in…Sergio Pirozzoli·Jul 19, 2024SaveLearn
Stokes flow of an evolving fluid film with arbitrary shape and topologyThe dynamics of evolving fluid films in the viscous Stokes limit is relevant to various applications, such as the modeling of lipid bilayers in cells. While the governing equations were formulated by…Cuncheng Zhu, David Saintillan, Albert Chern·Jul 19, 2024SaveLearn
Bubble dynamics in an inclined Hele-Shaw cellWe report experimental results on the dynamics of large bubbles in a Hele-Shaw cell subject to various inclination angles with respect to gravity. Low Reynolds number cases are studied by injecting…Benjamin Monnet, J. John Soundar Jerome, Valérie Vidal et al.·Jul 18, 2024SaveLearn
Droplet impact and splitting behaviour on superhydrophobic wedgesWe report an extensive computational and experimental investigation of droplet impact and subsequent splitting hydrodynamics on superhydrophobic wedges. 2D and necessary 3D simulations using the…Gudlavalleti V V S Vara Prasad, Parmod Kumar, Purbarun Dhar et al.·Jul 18, 2024SaveLearn
Interface-induced turbulence in viscous binary fluid mixturesWe demonstrate the existence of interface-induced turbulence, an emergent nonequilibrium statistically steady state (NESS) with spatiotemporal chaos, which is induced by interfacial fluctuations in…Nadia Bihari Padhan, Dario Vincenzi, Rahul Pandit·Jul 18, 2024SaveLearn
Particle image velocimetry and modelling of horizontal coherent liquid jets impinging on and draining down a vertical wallThe flow patterns created by a coherent horizontal liquid jet impinging on a vertical wall atmoderate flow rates (jet flowrates 0.5-4.0 L min-1, jet velocities 2.6-21 m s-1) are studied withwater on…W. Aouad, Julien R. Landel, S. B. Dalziel et al.·Jul 18, 2024SaveLearn
Water Drop on Thin Viscous Oil Layers: From Stick-Slip Spreading to DewettingThe impact of water droplets on thin layers of immiscible viscous liquids, such as oil films, is commonly encountered across contexts ranging from kitchen activities to industrial processes. In this…Shubham Kumar, Piyush Sahu, Surjit Bharatsingh et al.·Jul 18, 2024SaveLearn
Droplet breakup and size distribution in an airstream -- effect of inertiaWe experimentally investigate the morphology and breakup of a droplet as it descends freely from a height and encounters an airstream. The size distributions of the child droplets are analysed using…Someshwar Sanjay Ade, Pavan Kumar Kirar, Lakshmana Dora Chandrala et al.·Jul 18, 2024SaveLearn
Intrinsic relationship between synchronisation thresholds and Lyapunov vectors: evidence from large eddy simulations and shell modelsAn important parameter characterising the synchronisation of turbulent flows is the threshold coupling wavenumber. This study investigates the relationship between the threshold coupling wavenumber…Jian Li, Wenwen Si, Yi Li et al.·Jul 18, 2024SaveLearn
Transition to turbulence in the wide-gap spherical Couette systemThe spherical Couette system consists of two differentially rotating concentric spheres with a fluid filled in between. We study a regime where the outer sphere is rotating rapidly enough so that the…Ankit Barik, Santiago A. Triana, Michael Hoff et al.·Jul 17, 2024SaveLearn
Symmetry-breaking of turbulent flow due to asymmetric vortex shedding in periodic porous mediaIn this paper, we report new insight into a symmetry-breaking phenomenon that occurs for turbulent flow in periodic porous media composed of cylindrical solid obstacles with circular cross-section.…Vishal Srikanth, Andrey V. Kuznetsov·Jul 17, 2024SaveLearn
Generalized Scaling of the Turbulence Structure in Wall-Bounded FlowsScaling of the Reynolds stresses has been sought by many researchers, since it provides a template of universal dynamical patterns across a range of Reynolds numbers. Various statistical and…T. -W. Lee, J. E. Park·Jul 17, 2024SaveLearn
Particle transport and deposition in wall-sheared thermal turbulenceWe studied the transport and deposition behaviour of point particles in Rayleigh-B\'enard convection cells subjected to Couette-type wall shear. Direct numerical simulations (DNSs) are performed for…Ao Xu, Ben-Rui Xu, Heng-Dong Xi·Jul 17, 2024SaveLearn
Thermocapillary migration of a self-rewetting droplet on an inclined surface: A phase-field simulationIn this paper, we investigated the thermocapillary migration of a self-rewetting droplet on an inclined surface using a phase field based lattice Boltzmann method. Unlike the normal fluid whose…He Yan, Lei Wang, Jiangxu Huang et al.·Jul 17, 2024SaveLearn
A difference-free conservative phase-field lattice Boltzmann methodWe propose an innovative difference-free scheme that combines the one-fluid lattice Boltzmann method (lBM) with the conservative phase-field (CPF) lBM to effectively solve large-scale two-phase fluid…Chunheng Zhao, Saumil Patel, Taehun Lee·Jul 17, 2024SaveLearn
Empirical large-scale extension of Yakhot's model of strong turbulenceWe propose an empirical extension of Yakhot's model of strong turbulence [V. Yakhot, Phys. Rev. E 57(2) (1998)] that correctly describes the statistics of longitudinal velocity increments not only in…Christoph Renner·Jul 16, 2024SaveLearn
Shape-morphing membranes augment the performance of oscillating foil energy harvesting turbinesOscillating foil turbines (OFTs) can be used to produce power from rivers and tides by synchronizing their heaving motion with the strong lift force of vortices shed at their leading edge. Prior work…Ilan M. L. Upfal, Yuanhang Zhu, Eric Handy-Cardenas et al.·Jul 16, 2024SaveLearn
Semi-Analytical Modeling of Transient Stream Drawdown and Depletion in Response to Aquifer PumpingAnalytical and semi-analytical models for stream depletion with transient stream stage drawdown induced by groundwater pumping are developed to address a deficiency in existing models, namely, the…Bwalya Malama, Ying-Fan Lin, Kristopher L. Kuhlman·Jul 16, 2024SaveLearn
Application of the thin-film equations in modelling of Marangoni flow patterns amongst surfactant source and drain locationsSurfactants that are deposited at aqueous liquid films have the ability to generate surface tension gradients at the air-water interface, and thereby induce Marangoni flow. Combined with the…Julio Careaga, Peter A. Korevaar, Vanja Nikolić et al.·Jul 16, 2024SaveLearn
Sparse data assimilation for under-resolved large-eddy simulationsThe need for accurate and fast scale-resolving simulations of fluid flows, where turbulent dispersion is a crucial physical feature, is evident. Large-eddy simulations (LES) are computationally more…Justin Plogmann, Oliver Brenner, Patrick Jenny·Jul 16, 2024SaveLearn