Kinetic modelling of rarefied gas mixtures with disparate massThe simulation of rarefied gas flow based on the Boltzmann equation is challenging, especially when the gas mixtures have disparate molecular masses. In this paper, a computationally tractable…Qi Li, Jianan Zeng, Lei Wu·Mar 11, 2024SaveLearn
Efficient Estimation of the Convective Cooling Rate of Photovoltaic Arrays with Various Geometric Configurations: a Physics-Informed Machine Learning ApproachConvective heat transfer is crucial for photovoltaic (PV) systems, as the power generation of PV is sensitive to temperature. The configuration of PV arrays have a significant impact on convective…Dapeng Wang, Zhaojian Liang, Ziqi Zhang et al.·Mar 11, 2024SaveLearn
Effect of non-equilibrium thermochemistry on Pitot pressure measurements in shock tunnels (or: Is 0.92 really the magic number?)Pitot pressure is the most common measurement in high total enthalpy shock tunnels for test condition verification. Nozzle calculations using multi-temperature non-equilibrium thermochemistry are…Tamara Sopek, Peter Jacobs, Suria-Devi Subiah et al.·Mar 11, 2024SaveLearn
Control of flow behavior in complex fluids using automatic differentiationInverse design of complex flows is notoriously challenging because of the high cost of high dimensional optimization. Usually, optimization problems are either restricted to few control parameters,…Mohammed Alhashim, Kaylie Hausknecht, Michael Brenner·Mar 10, 2024SaveLearn
Transient growth in diabatic boundary layers with fluids at supercritical pressureIn the region close to the thermodynamic critical point and in the proximity of the pseudo-boiling (Widom) line, strong property variations substantially alter the growth of modal instabilities, as…Pietro Carlo Boldini, Benjamin Bugeat, Jurriaan W. R. Peeters et al.·Mar 10, 2024SaveLearn
The effect of turbulence on the minimum thickness of a liquid film flowing down a vertical tubeWhen a liquid flows down a vertical tube at a low flowrate, it may not be able to completely cover the surface as a film, and the flow will comprise a number of rivulets separated by unwetted areas.…David T. Hughes·Mar 10, 2024SaveLearn
Fish-inspired tracking of underwater turbulent plumesAutonomous ocean-exploring vehicles have begun to take advantage of onboard sensor measurements of water properties such as salinity and temperature to locate oceanic features in real time. Such…Peter Gunnarson, John O. Dabiri·Mar 10, 2024SaveLearn
Instability of stratified air-water flows in circular pipesThis work deals with stability of two-phase stratified air-water flows in horizontal circular pipes. For this purpose, we performed a linear stability analysis, which considers all possible…Ilya Barmak, Alexander Gelfgat, Neima Brauner·Mar 9, 2024SaveLearn
Time-dependent droplet detachment behaviour from wettability-engineered fibers during fog harvestingWater collection from natural and industrial fogs has recently been viewed as a viable freshwater source. An interesting outgrowth of the relevant research as focused on arresting of the drift losses…Arijit Saha, Arkadeep Datta, Arani Mukhopadhyay et al.·Mar 9, 2024SaveLearn
CoNFiLD: Conditional Neural Field Latent Diffusion Model Generating Spatiotemporal TurbulenceThis study introduces the Conditional Neural Field Latent Diffusion (CoNFiLD) model, a novel generative learning framework designed for rapid simulation of intricate spatiotemporal dynamics in…Pan Du, Meet Hemant Parikh, Xiantao Fan et al.·Mar 9, 2024SaveLearn
CFD analysis of the influence of solvent viscosity ratio on the creeping flow of viscoelastic fluid over a channel-confined circular cylinderIn this study, the role of solvent viscosity ratio (β) on the creeping flow characteristics of Oldroyd-B fluid over a channel-confined circular cylinder has been explored numerically. The…Pratyush Kumar Mohanty, Akhilesh Kumar Sahu, Ram Prakash Bharti·Mar 9, 2024SaveLearn
Motion of a rigid sphere penetrating a deep poolIn this study, we experimentally examine the behavior of a free-falling rigid sphere penetrating a quiescent liquid pool. Observations of the sphere trajectory in time are made using two orthogonally…Prasanna Kumar Billa, Tejaswi Josyula, Cameron Tropea et al.·Mar 9, 2024SaveLearn
A Spectral Element Enrichment Wall-ModelWe develop an enrichment wall-model within the spectral element method (SEM) framework for large-eddy simulations of wall-bounded flows. The method augments the polynomial solution in the…Steven R. Brill, Pinaki Pal, Muhsin Ameen et al.·Mar 8, 2024SaveLearn
Physics-based distinction of nonequilibrium effects in near-wall modeling of turbulent separation bubble with and without sweepPressure-gradient-induced separation of swept and unswept turbulent boundary layers, based on the DNS studies of Coleman et al. (J. Fluid Mech. 2018 & 2019), have been analyzed for various…Imran Hayat, George Ilhwan Park·Mar 8, 2024SaveLearn
Accelerating high order discontinuous Galerkin solvers through a clustering-based viscous/turbulent-inviscid domain decompositionWe explore the unsupervised clustering technique introduced in [25] to identify viscous/turbulent from inviscid regions in incompressible flows. The separation of regions allows solving the…Kheir-Eddine Otmani, Andrés Mateo-Gabín, Gonzalo Rubio et al.·Mar 8, 2024SaveLearn
Exponential asymptotics and Stokes surfaces in nonlinear three-dimensional flowsIn this dissertation, we seek to expand the scope of work done by Lustri and Chapman (2013) in modelling 3D flow past a point source, in order to account for more general flows, where the strength of…John A. Fitzgerald, Philippe H. Trinh·Mar 8, 2024SaveLearn
Numerical simulations of a stochastic dynamics leading to cascades and loss of regularity: applications to fluid turbulence and generation of fractional Gaussian fieldsMotivated by the modeling of the spatial structure of the velocity field of three-dimensional turbulent flows, and the phenomenology of cascade phenomena, a linear dynamics has been recently proposed…Geoffrey Beck, Charles-Edouard Bréhier, Laurent Chevillard et al.·Mar 8, 2024SaveLearn
Designing Leidenfrost dropsLarge Leidenfrost drops exhibit erratic bubble bursts to release vapor accumulated beneath the liquid, becoming amorphous and unstable. Here we report an original and remarkably simple method to…F. Pacheco-Vázquez, M. Aguilar-González, L. Victoria-García·Mar 8, 2024SaveLearn
Predicting burst events in a forced 2D flow: A wavelet-based analysisPredicting and perhaps mitigating against rare, extreme events in fluid flows is an important challenge. Due to the time-localised nature of these events, Fourier-based methods prove inefficient in…Anagha Madhusudanan, Rich R. Kerswell·Mar 8, 2024SaveLearn
Investigating the shortcomings of the Flow Convergence Method for quantification of Mitral Regurgitation in a pulsatile in-vitro environment and with Computational Fluid DynamicsThe flow convergence method includes calculation of the proximal isovelocity surface area (PISA) and is widely used to classify mitral regurgitation (MR) with echocardiography. It constitutes a…Robin Leister, Roger Karl, Lubov Stroh et al.·Mar 8, 2024SaveLearn
Freezing delay of a drop impacting on a monolayer of cold grainsWe investigate a subfreezing droplet impact scenario in a low-humidity environment, where the target is a cold granular monolayer. When the undercooling degree of targets passes a threshold, such a…Yudong Li, Song-Chuan Zhao·Mar 8, 2024SaveLearn
Prediction of turbulent energy based on low-rank resolvent modes and machine learningA modelling framework based on the resolvent analysis and machine learning is proposed to predict the turbulent energy in incompressible channel flows. In the framework, the optimal resolvent…Yitong Fan, Bo Chen, Weipeng Li·Mar 8, 2024SaveLearn
Langmuir turbulence in suspended kelp farmsThis study investigates the influence of suspended kelp farms on ocean mixed layer hydrodynamics in the presence of currents and waves. We use the large eddy simulation method, where the wave effect…Tong Bo, James C. McWilliams, Chao Yan et al.·Mar 7, 2024SaveLearn
Lee-Wave Energy Sinks in Bottom-Intensified Flow: Reabsorption, Dissipation and Nonlinear Spectral TransferIdealized numerical simulation is used to explore energy sinks for lee waves trapped in their bottom-intensified generating flow. In addition to the loss to explicit dissipation and reabsorption…Yue Cynthia Wu, Eric Kunze, Amit Tandon et al.·Mar 7, 2024SaveLearn
Quantum-Based Salp Swarm Algorithm Driven Design Optimization of Savonius Wind Turbine-Cylindrical Deflector SystemSavonius turbines, prominent in small-scale wind turbine applications operating under low-speed conditions, encounter limitations due to opposing torque on the returning blade, impeding high…Paras Singh, Vishal Jaiswal, Subhrajit Roy et al.·Mar 7, 2024SaveLearn