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Fluid Dynamics papers — page 189

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Symmetry groups and invariant solutions of plane Poiseuille flow
Equilibrium, traveling-wave, and periodic-orbit solutions of the Navier-Stokes equations provide a promising avenue for investigating the structure, dynamics, and statistics of transitional flows.…
Pratik P. Aghor, John F. GibsonSep 17, 2024
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Optimal trajectories for Bayesian olfactory search in turbulent flows: the low information limit and beyond
In turbulent flows, tracking the source of a passive scalar cue requires exploiting the limited information that can be gleaned from rare, stochastic encounters with the cue. When crafting a search…
Robin A. Heinonen, Luca Biferale, Antonio Celani et al.Sep 17, 2024
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Three-dimensional coherent structures in a curved pipe flow
Dean's approximation for curved pipe flow, valid under loose coiling and high Reynolds numbers, is extended to study three-dimensional travelling waves. Two distinct types of solutions bifurcate from…
Runjie Song, Kengo DeguchiSep 17, 2024
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Solving the Hele-Shaw flow using the Harrow-Hassidim-Lloyd algorithm on superconducting devices: A study of efficiency and challenges
The development of quantum processors capable of handling practical fluid flow problems represents a distant yet promising frontier. Recent strides in quantum algorithms, particularly linear solvers,…
Muralikrishnan Gopalakrishnan Meena, Kalyana C. Gottiparthi, Justin G. Lietz et al.Sep 17, 2024
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Semi-analytical model of optothermal fluidics in a confinement
In this paper, we provide the semi-analytical solution of the temperature and flow fields of a fluid confined in a narrow space between two parallel plates. The temperature increase is triggered by…
Tetsuro Tsuji, Shun Saito, Satoshi TaguchiSep 17, 2024
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Spontaneous emission of internal waves by a radiative instability
The spontaneous emission of internal waves (IWs) from balanced mesoscale eddies has been previously proposed to provide a source of oceanic IW kinetic energy (KE). This study examines the mechanisms…
Subhajit Kar, Roy Barkan, James C. McWilliams et al.Sep 16, 2024
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OpenACC offloading of the MFC compressible multiphase flow solver on AMD and NVIDIA GPUs
GPUs are the heart of the latest generations of supercomputers. We efficiently accelerate a compressible multiphase flow solver via OpenACC on NVIDIA and AMD Instinct GPUs. Optimization is…
Benjamin Wilfong, Anand Radhakrishnan, Henry A. Le Berre et al.Sep 16, 2024
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Generalized Green-Ampt Approach to 1D Oscillatory Flows in Partially Saturated/Unsaturated Media: Capillary Effects in Beach Hydrodynamics (Semi-analytical & Numerical studies)
Semi-analytical multi-front solutions of water table response due to periodic forcing in a partially saturated vertical porous column are developed, tested and compared to finite volume solutions of…
Khalil Alastal, Rachid Ababou, Dominique AstrucSep 16, 2024
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Correlations for the Interphase Drag in the Two-Fluid Model of Gas--Liquid Flows through Packed-Bed Reactors
Experiments conducted by NASA measured the pressure drop due to gas--liquid flow through a packed-bed reactor under microgravity conditions. From these experiments, we develop correlations for the…
Pranay P. Nagrani, Amy M. Marconnet, Ivan C. ChristovSep 16, 2024
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uniGasFoam: a particle-based OpenFOAM solver for multiscale rarefied gas flows
This paper presents uniGasFoam, an open-source particle-based solver for multiscale rarefied gas flow simulations, which has been developed within the well-established OpenFOAM framework, and is an…
Nikos Vasileiadis, Giorgos Tatsios, Craig White et al.Sep 16, 2024
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On force balance in Brinkman fluids under confinement
A point force acting on a Brinkman fluid in confinement is always counterbalanced by the force on the porous medium, the force on the walls and the stress at open boundaries. We discuss the…
Abdallah Daddi-Moussa-Ider, Andrej VilfanSep 16, 2024
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Experimental Study on Boiling of Nanofluids in Copper Foam
Nanofluids are suspensions of nanoscale particles (such as metals and their oxides) in base fluids (such as water, oil, or alcohol), which can significantly enhance the heat transfer performance of…
Kai-Xin Hu, Jing-Han PanSep 16, 2024
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Space-time adaptive ADER-DG finite element method with LST-DG predictor and a posteriori sub-cell WENO finite-volume limiting for simulation of non-stationary compressible multicomponent reactive flows
The space-time adaptive ADER finite element DG method with a posteriori correction technique of solutions on subcells by the finite-volume ADER-WENO limiter was used to simulate non-stationary…
I. S PopovSep 16, 2024
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Space-time adaptive ADER-DG finite element method with LST-DG predictor and a posteriori sub-cell ADER-WENO finite-volume limiting for multidimensional detonation waves simulation
The space-time adaptive ADER-DG finite element method with LST-DG predictor and a posteriori sub-cell ADER-WENO finite-volume limiting was used for simulation of multidimensional reacting flows with…
I. S. PopovSep 16, 2024
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Large/small eddy simulations: A high-fidelity method for studying high-Reynolds number turbulent flows
Direct numerical simulations (DNS) are one of the main ab initio tools to study turbulent flows. However, due to their considerable computational cost, DNS are primarily restricted to canonical flows…
Arnab Moitro, Sai Sandeep Dammati, Alexei Y. PoludnenkoSep 15, 2024
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Periodic Steady Vortices in a Stagnation Point Flow II
Steady-state perturbations to a stagnation point flow of the form U=(0,A'y,-A'z) are known which consist of a periodic array of counter-rotating vortices whose axes are parallel to the…
Oliver S. KerrSep 15, 2024
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Giant superhydrophobic slip of shear-thinning liquids
We theoretically illustrate how complex fluids flowing over superhydrophobic surfaces may exhibit giant flow enhancements in the double limit of small solid fractions (ε1) and strong…
Ory Schnitzer, Prasun K. RaySep 14, 2024
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On the performances of standard and kinetic energy preserving time-integration methods for incompressible-flow simulations
The effects of kinetic-energy preservation errors due to Runge-Kutta (RK) temporal integrators have been analyzed for the case of large-eddy simulations of incompressible turbulent channel flow.…
Marco Artiano, Carlo De Michele, Francesco Capuano et al.Sep 13, 2024
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Deep reinforcement learning for tracking a moving target in jellyfish-like swimming
We develop a deep reinforcement learning method for training a jellyfish-like swimmer to effectively track a moving target in a two-dimensional flow. This swimmer is a flexible object equipped with a…
Yihao Chen, Yue YangSep 13, 2024
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A novel volume of fluid ghost-cell immersed boundary method for free surface flow interacting with structures
This paper presents a novel volume of fluid ghost-cell immersed boundary (IB) method for two-phase free surface flow interacting with structures. To circumvent the disturbance occurring around the…
Fan Chen, Jinghua Wang, Huan-Feng DuanSep 13, 2024
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The stability of stratified horizontal flows of carbon dioxide at supercritical pressures
Fluids at supercritical pressures exhibit large variations in density near the pseudo critical line, such that buoyancy plays a crucial role in their fluid dynamics. Here, we experimentally…
Marko Draskic, Jerry Westerweel, Rene PecnikSep 13, 2024
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Bridging the Rossby number gap in rapidly rotating thermal convection
Geophysical and astrophysical fluid flows are typically driven by buoyancy and strongly constrained at large scales by planetary rotation. Rapidly rotating Rayleigh-B\'enard convection (RRRBC)…
Adrian van Kan, Keith Julien, Benjamin Miquel et al.Sep 13, 2024
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Hydrodynamics of an oscillating cylinder inline with steady current
Wake and force characteristics of an oscillating cylinder in inline steady currents are investigated numerically over a wide parameter space of dimensionless oscillation amplitude ($A* = 0.01 -…
Chengjiao Ren, Feifei Tong, Fei He et al.Sep 13, 2024
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Principles of hydrodynamic particle manipulation in internal Stokes flow
Manipulation of small-scale particles across streamlines is the elementary task of microfluidic devices. Many such devices operate at very low Reynolds numbers and deflect particles using arrays of…
Xuchen Liu, Partha Kumar Das, Sascha HilgenfeldtSep 13, 2024
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Digital twin of a large-aspect-ratio Rayleigh-B\'enard experiment: Role of thermal boundary conditions, measurement errors and uncertainties
Albeit laboratory experiments and numerical simulations have proven themselves successful in enhancing our understanding of long-living large-scale flow structures in horizontally extended…
Philipp Patrick Vieweg, Theo Käufer, Christian Cierpka et al.Sep 12, 2024
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