Wake transition and aerodynamics of a dragonfly-inspired airfoilWe investigate the dynamics and the stability of the incompressible flow past a corrugated dragonfly-inspired airfoil in the two-dimensional (2D) α-Re parameter space, where α is the…Alessandro Chiarini, Gabriele Nastro·Feb 16, 2025SaveLearn
Discussion on "Resurrecting a Neglected Measurement Technique for Air-Water Flows"Over the last years, there has been a renewed interest in differentiating various contributions to the air concentration in high Froude-number self-aerated flows, see for example Kramer (2024),…Matthias Kramer, Hang Wang, Daniel B. Bung·Feb 16, 2025SaveLearn
Bayesian Optimization of the GEKO Turbulence Model for Predicting Flow Separation Over a Smooth SurfaceThis paper applies Bayesian-optimization-RANS (turbo-RANS) to improve Reynolds-averaged Navier-Stokes (RANS) turbulence models for a converging-diverging channel, a case with adverse pressure…Nikhila Kalia, Ryley McConkey, Eugene Yee et al.·Feb 16, 2025SaveLearn
Vortex Dynamics in Tubular Fluid MembranesThin cylindrical membranes arise in a wide variety of biological systems ranging from tubular structures on and within cell membranes to in-vitro experiments on artificial vesicles. Motor proteins…Udaya Maurya, Surya Teja Gavva, Arpan Saha et al.·Feb 16, 2025SaveLearn
Supersonic flow kinetics: Mesoscale structures, thermodynamic nonequilibrium effects and entropy production mechanismsSupersonic flow is a typical nonlinear, nonequilibrium, multiscale, and complex phenomenon. This paper applies discrete Boltzmann method/model (DBM) to simulate and analyze these characteristics. A…Yanbiao Gan, Zhaowen Zhuang, Bin Yang et al.·Feb 15, 2025SaveLearn
Multiscale Convolutional Neural Networks for Subgrid-scale Modeling in Large-Eddy SimulationThis study proposes a multiscale convolutional neural network subgrid-scale (MSC-SGS) model for large-eddy simulation (LES). This model incorporates multiscale representations obtained via filtering…Bahrul Jalaali, Kie Okabayashi·Feb 15, 2025SaveLearn
Coupled hydro-aero-turbo dynamics of liquid-tank system for wave energy harvesting: Numerical modellings and scaled prototype testsAn integrated numerical model is proposed for the first time to explore the coupled hydro-aero-turbo dynamics of wave-energy-harvesting (WEH) liquid tanks. A scaled prototype of the WEH liquid tank…Chongwei Zhang, Xunhao Zhu, Cheng Zhang et al.·Feb 15, 2025SaveLearn
Numerical investigation of erosive wear considering surface degradation using coupled CFD-DEM and a bond modelA three-dimensional simulation model is proposed here to study the erosive wear of structure caused by solid particles, which accounts for the accumulation of surface deformation and degradation…Vinh D. X. Nguyen, A. Kiet Tieu, Damien Andre et al.·Feb 15, 2025SaveLearn
New Calculations of the Turbulence-Turbulence Contribution to the Wind Noise Pressure Spectra within Homogeneous Anisotropic TurbulenceThe turbulence-turbulence interaction and the turbulence-shear interaction are the sources of intrinsic pressure fluctuation for wind noise generated by atmospheric turbulence. In previous research…Jiao Yu, Chuanyang Jiang, Yanying Zhu et al.·Feb 15, 2025SaveLearn
Insights of Transitions to Thermoacoustic Instability in Inverse Diffusion Flame using Multifractal Detrended Fluctuation AnalysisThe inverse diffusion flame (IDF) can experience thermoacoustic instability due to variations in power input or flow conditions. However, the dynamical transitions in IDF that lead to this…Somnath De, Soham Bhattacharya, Arijit Bhattacharya et al.·Feb 14, 2025SaveLearn
On the use of an advanced Kirchhoff rod model to study mooring linesIn this work, we investigate the application of an advanced nonlinear torsion- and shear-free Kirchhoff rod model, enhanced with a penalty-based barrier function (to simulate the seabed contact),…Bruno A. Roccia, Hoa T. Nguyen, Petter Veseth et al.·Feb 14, 2025SaveLearn
Turbulent Mixing Dynamics of Under-Expanded Hydrogen Jets in Propulsion SystemsUnderexpanded jets are present in various engineering applications; in recent years, they have gained special attention because of the development of gas-fueled propulsion systems. In these…Francesco Duronio, Andrea Di Mascio·Feb 14, 2025SaveLearn
An Investigation of Flow and Interface Dynamics Near a Moving Contact Line at Obtuse Contact AnglesThe flow near a moving contact line is primarily governed by three key parameters: viscosity ratio, dynamic contact angle, and inertia. While the behavior of dynamic contact angles has been…Charul Gupta, Venkata Sai Anvesh Sangadi, Lakshmana Dora Chandrala et al.·Feb 14, 2025SaveLearn
Space-time proper orthogonal decomposition of actuation transients: plasma-controlled jet flowWe investigate the forcing-induced transient between statistically stationary and cyclostationary states. The transient dynamics of a turbulent supersonic twin-rectangular jet flow, forced…Brandon Yeung, Oliver T. Schmidt·Feb 13, 2025SaveLearn
Second-order theory for multi-hinged directional wavemakersThe second-order directional wavemaker theory for regular and irregular waves is extended to multi-hinged wavemakers and combined piston--flap wavemaker systems. Derived expressions enable…Andreas H. Akselsen·Feb 13, 2025SaveLearn
Nonmodal amplitude equationsWe consider fluid flows for which the linearized Navier-Stokes operator is strongly non-normal. The responses of such flows to external perturbations are spanned by a generically very large number of…Yves-Marie Ducimetière, François Gallaire·Feb 13, 2025SaveLearn
Wetting simulation of the porous structure of a heat pipe using an eXtended Discontinuous Galerkin Method and a Parameterized Level-SetWe perform high-order simulations of two-phase flows in capillaries, with and without evaporation. Since a sharp-interface model is used, singularities can arise at the three-phase contact line,…Irina Shishkina, Matthias Rieckmann, Martin Oberlack et al.·Feb 13, 2025SaveLearn
Internal Aerodynamics of Supersonic Crossflows with Transverse Liquid InjectionThis study experimentally investigates the internal aerodynamics of transverse liquid injection in a supersonic crossflow (Mach (M) = 2.1) using two configurations: single and tandem (8 mm spacing)…Srinivas M V, Arun Kumar Rajagopal, Lebonah B et al.·Feb 13, 2025SaveLearn
Confinement suppresses the effect of rotation on convectionWe perform direct numerical simulations (DNS) to study the effect of bi-lateral confinement, i.e., the effect of aspect ratio, on the Rayleigh number (Ra) for the onset of wall-mode convection…V. K. Tripathi, P. Joshi·Feb 13, 2025SaveLearn
Phototactic Bioconvection in a Rotating Isotropic Porous Medium: Linear Stability AnalysisThis study investigates the linear stability of phototactic bioconvection in a rotating porous medium under collimated light, incorporating the effects of critical intensity, Darcy number, and Taylor…Sandeep Kumar, Suneet Singh·Feb 13, 2025SaveLearn
On the estimation of specific interfacial areas in aerated flowsThis work provides a short clarification on the definition of specific interfacial areas in aerated flows, thereby distinguishing between the specific interfacial area related to the volume of an…Matthias Kramer·Feb 13, 2025SaveLearn
Using wetting and ultrasonic waves to extract oil from oil/water mixturesOil and water placed atop of a solid surface respond differently to a MHz-level surface acoustic wave (SAW) propagating in the solid due to their different surface wetting properties. We observe…Yifan Li, Jesus M. Marcos, Mark Fasano et al.·Feb 12, 2025SaveLearn
Viscoplasticity can stabilise liquid collar motion on vertical cylindersLiquid films coating vertical cylinders can form annular liquid collars which translate downwards under gravity. We investigate the dynamics of a thin viscoplastic liquid film coating the interior or…James D. Shemilt, Alice B. Thompson, Alex Horsley et al.·Feb 12, 2025SaveLearn
Primary and secondary motions in an annular plane Couette flowAxisymmetric direct numerical simulations are carried out to study the hydrodynamics of a laminar, stationary, incompressible, Newtonian, single-phase flow in an Annular Plane Couette (APC) channel.…Rémi Macadré, Olivier C Masbernat, Frederic Risso et al.·Feb 12, 2025SaveLearn
A precise conformally mapped method for water waves in complex transient environmentsA two-dimensional water wave model based on conformal mapping is presented. The model is exact in the sense that it does not rely on truncated series expansions, nor suffer any numerical diffusion.…Andreas H. Akselsen·Feb 12, 2025SaveLearn