Semi-analytical model of optothermal fluidics in a confinementIn 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 Taguchi·Sep 17, 2024SaveLearn
Spontaneous emission of internal waves by a radiative instabilityThe 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, 2024SaveLearn
OpenACC offloading of the MFC compressible multiphase flow solver on AMD and NVIDIA GPUsGPUs 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, 2024SaveLearn
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 Astruc·Sep 16, 2024SaveLearn
Correlations for the Interphase Drag in the Two-Fluid Model of Gas--Liquid Flows through Packed-Bed ReactorsExperiments 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. Christov·Sep 16, 2024SaveLearn
uniGasFoam: a particle-based OpenFOAM solver for multiscale rarefied gas flowsThis 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, 2024SaveLearn
On force balance in Brinkman fluids under confinementA 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 Vilfan·Sep 16, 2024SaveLearn
Experimental Study on Boiling of Nanofluids in Copper FoamNanofluids 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 Pan·Sep 16, 2024SaveLearn
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 flowsThe 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 Popov·Sep 16, 2024SaveLearn
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 simulationThe 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. Popov·Sep 16, 2024SaveLearn
Large/small eddy simulations: A high-fidelity method for studying high-Reynolds number turbulent flowsDirect 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. Poludnenko·Sep 15, 2024SaveLearn
Periodic Steady Vortices in a Stagnation Point Flow IISteady-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. Kerr·Sep 15, 2024SaveLearn
Giant superhydrophobic slip of shear-thinning liquidsWe 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. Ray·Sep 14, 2024SaveLearn
On the performances of standard and kinetic energy preserving time-integration methods for incompressible-flow simulationsThe 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, 2024SaveLearn
Deep reinforcement learning for tracking a moving target in jellyfish-like swimmingWe 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 Yang·Sep 13, 2024SaveLearn
A novel volume of fluid ghost-cell immersed boundary method for free surface flow interacting with structuresThis 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 Duan·Sep 13, 2024SaveLearn
The stability of stratified horizontal flows of carbon dioxide at supercritical pressuresFluids 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 Pecnik·Sep 13, 2024SaveLearn
Bridging the Rossby number gap in rapidly rotating thermal convectionGeophysical 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, 2024SaveLearn
Hydrodynamics of an oscillating cylinder inline with steady currentWake 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, 2024SaveLearn
Principles of hydrodynamic particle manipulation in internal Stokes flowManipulation 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 Hilgenfeldt·Sep 13, 2024SaveLearn
Digital twin of a large-aspect-ratio Rayleigh-B\'enard experiment: Role of thermal boundary conditions, measurement errors and uncertaintiesAlbeit 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, 2024SaveLearn
Viscoelastic fluid flow in a slowly varying planar contraction: the role of finite extensibility on the pressure dropWe analyze the steady viscoelastic fluid flow in slowly varying contracting channels of arbitrary shape and present a theory based on the lubrication approximation for calculating the flow…Bimalendu Mahapatra, Tachin Ruangkriengsin, Howard A. Stone et al.·Sep 12, 2024SaveLearn
Direct numerical simulation of particle clustering and turbulence modulation: an Eulerian approachWe present a new Eulerian framework for the computation of turbulent compressible multiphase channel flows, specifically to assess turbulence modulation by dispersed particulate matter in dilute…Ajay Dhankarghare, Yuval Dagan·Sep 12, 2024SaveLearn
Enhancing Accuracy of Transition Models for Gas Turbine Applications Through Data-Driven ApproachesSeparated flow transition is a very popular phenomenon in gas turbines, especially low-pressure turbines (LPT). Low-fidelity simulations are often used for gas turbine design. However, they are…Harshal D. Akolekar·Sep 12, 2024SaveLearn
Mesh-based Super-Resolution of Fluid Flows with Multiscale Graph Neural NetworksA graph neural network (GNN) approach is introduced in this work which enables mesh-based three-dimensional super-resolution of fluid flows. In this framework, the GNN is designed to operate not on…Shivam Barwey, Pinaki Pal, Saumil Patel et al.·Sep 12, 2024SaveLearn