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Start Over Descriptor "Computational fluid dynamics (CFD)" Publication Type Books
10 results on '"Computational fluid dynamics (CFD)"'

1. The Numerical Simulation of Fluid Flow.

Author

Castilla, Robert, Castilla, Robert, and Vernet, Anton

Subjects
Information technology industries, Computational Fluid Dynamics (CFD), Federation Internationale de l'Automobile (FIA), Formula 1, Lagrangian description, Lagrangian vortex method, OpenFoam, P-waves, S-waves, Stoneley wave, Venturi effect, aeroacoustics, bluff body, bluff body aerodynamics, boundary layer separation, cave formation, dispersion, dispersion-relation-preserving, dissipation, downforce, drag, external aerodynamics, finite vortex method, flow-structure interaction, immersed boundary method, incompressible Navier-Stokes equation, incompressible flow, local radial point interpolation cumulant LBM, quasi multi-moment method, roughness model, scattered wave, snappyHexMesh, suppression hybrid control, three-dimensional effect correction model of the wake, two-dimensional wake simulation, vertical axis wind turbine (VAWT), vortex, vortex particle method, vortex shedding, wake, wind turbine
Abstract

Summary: This book collects the accepted contributions to the Special Issue "The Numerical Simulation of Fluid Flow" in the Energies journal of MDPI. It is focused more on practical applications of numerical codes than in its development. It covers a wide variety of topics, from aeroacoustics to aerodynamics and flow-particles interaction.

2. New Challenges in Water Systems.

Author

Ramos, Helena M., Carravetta, Armando, Mc Nabola, Aonghus, and Ramos, Helena M.

Subjects
History of engineering & technology, CFD, EPANET, air valve, air-water interface, computational fluid dynamics (CFD), decision making model, dimensional analysis, energy production, energy recovery, entrapped air, environmental flows, experiments, failure risk analysis, filling, flow, flowmeters, hydraulic characterization, hydraulic transients and CFD analyses, hydropeaking, hydropower plants, leakage reduction, micro-hydropower, new design solutions and eco-design, optimization, pipe system efficiency, pipelines, pressure reducing valves, pumped storage power plants, pumped-storage, pumping system, pumps as turbines, reservoirs, resilience, risk, risk assessment methodology, safe water, safety and control, safety of water supply consumers, smart water grids, smart water management, transient, trunk network, ultrasonic Doppler velocimetry (UDV), water distribution network, water distribution networks, water drinking network, water losses, water management, water networks, water supply system, water systems efficiency, water-energy nexus
Abstract

Summary: New challenges in water systems toward safety, efficiency, reliability, and system flexibility will be fundamental in the near future. In this book, readers can find different approaches that include safety analysis, system efficiency improvements, and new innovative designs. The risk function is a measure of its vulnerability level and security loss. Analyses of transient flows associated with the most dangerous operating conditions, are compulsory to grant system liability in terms of water quantity, quality, and system management. Specific equipment, such as air valves, is used in pressurized water pipes to manage the air inside, associated with the emptying and filling process. Advanced tools are developed toward near-future smart water grids. The water system efficiency and water-energy nexus, through the implementation of suitable pressure control and energy recovery devices, as well as pumped-storage hydropower, provide guidelines toward the most technical and environmental cost-effective solutions. Integrated analysis of water and energy allows more reliable, flexible, and sustainable eco-design projects, reaching better resilience systems. Hydraulic simulators and computational fluid dynamics (CFD), conjugating with field or experimental tests, supported by advanced smart equipment, allow a better design, control, and complex event anticipation occurrence to attain high levels of water system security and efficiency.

3. Mathematical Modeling and Simulation in Mechanics and Dynamic Systems.

Author

Scutaru, Maria Luminița, Pruncu, Catalin I., and Scutaru, Maria Luminița

Subjects
Mathematics & science, Research & information: general, "holographic implementations", ABAQUS, ANN, Artificial Neural Network (ANN), COVID-19, Catalonia, Computational Fluid Dynamics (CFD), Convolutional Neural Network (CNN), Deep Learning (DL), Euler-Poincaré equation, HT-PEMFC, Lagrange-d'Alembert principle, Lie group, Monte Carlo simulation, PEM fuel cell, SARS-CoV-2, SDL, SEIRD (Susceptible, Exposed, Infected and Recovered and Death), SL (2R) group, Sine-Gordon equations, T-stress, X-FEM, actual systems, apolar transport, artificial neural network, autonomous feature extraction, code-based modelling approach, complex system dynamics, computational solutions, computer simulations, control, crack, cubics, deep learning, differentiability, dimensional analysis, double Lorentzian spectrum, ecological analysis, ecological coefficient of performance, exergy analysis, extended finite element method, extended iso-geometric analysis, finite time thermodynamic optimization, fractal Schrödinger regimes, fractal hydrodynamic regimes, fractal kink, fractal soliton, geometric analogy, harmonic mapping, harmonic mapping principle, heat transfer, helicopter model, hidden symmetries, high temperature proton exchange membrane fuel cell, interphase section, irreversibility, machine learning, mechanics, model law, modeling, n/a, nanowire cantilever, non-conservative dynamical system, notch, numerical analysis, partial aging in standby, percolation onset, period doubling scenario, photovoltaics, pipe, pipeline, polymer CNTs systems, power density, qualitative and quantitative verification of simulation model, similarity theory, solar energy, state probability functions, stochastic model, straight bar, stress difference method (SDM), system of transcendental equation, thermodynamic efficiency, thermophotovoltaics, transfer learning, turbulent flow
Abstract

Summary: The present book contains the 16 papers accepted and published in the Special Issue "Mathematical Modeling and Simulation in Mechanics and Dynamic Systems" of the MDPI "Mathematics" journal, which cover a wide range of topics connected to the theory and applications of Modeling and Simulation of Dynamic Systems in different field. These topics include, among others, methods to model and simulate mechanical system in real engineering. It is hopped that the book will find interest and be useful for those working in the area of Modeling and Simulation of the Dynamic Systems, as well as for those with the proper mathematical background and willing to become familiar with recent advances in Dynamic Systems, which has nowadays entered almost all sectors of human life and activity.

4. Mathematical Modelling of Energy Systems and Fluid Machinery.

Author

Morini, Mirko, Morini, Mirko, and Pinelli, Michele

Subjects
Technology: general issues, CFD, CFD analysis, CFD-DEM coupling method, DOE, Francis turbine, Kaplan turbine, Levenberg-Marquardt algorithm, Monte Carlo dropout, anti-cavity fins, approximation model, artificial neural network (ANN), axial-flow pump, blade slot, capacity, centrifugal pump, coefficient of performance, computational fluid dynamics (CFD), critical wall roughness, deep ensemble, deep neural network (DNN), design considerations, double hidden layer, double-channel sewage pump, draft tube, draft tube optimization, dynamic simulation, energy recovery, energy systems, external characteristics, free surface flow, free surface vortices, heating, impeller, intake structures, internal flow characteristics, low flow rates, magnetocaloric effect, mathematical modelling, modelling techniques, multi-disciplinary, numerical calculation, numerical simulation, optimization design, orthogonal test, particle features and behaviors, performance prediction, physical hydraulic model, refrigeration, response surface, single-channel pump, solid-liquid two-phase flows, stratification, subcooled boiling flows, thermal energy storage, throttling valves, turboexpander, uncertainty quantification (UQ), unsteady pressure, vertical pump, vortex rope
Abstract

Summary: The ongoing digitalization of the energy sector, which will make a large amount of data available, should not be viewed as a passive ICT application for energy technology or a threat to thermodynamics and fluid dynamics, in the light of the competition triggered by data mining and machine learning techniques. These new technologies must be posed on solid bases for the representation of energy systems and fluid machinery. Therefore, mathematical modelling is still relevant and its importance cannot be underestimated. The aim of this Special Issue was to collect contributions about mathematical modelling of energy systems and fluid machinery in order to build and consolidate the base of this knowledge.

5. Aero/Hydrodynamics and Symmetry.

Author

Shadloo, Mostafa Safdari and Shadloo, Mostafa Safdari

Subjects
History of engineering & technology, Advection-diffusion, Atangana-Baleanu derivative, Autonomous Underwater Hovering Vehicle (AUH), Autonomous Underwater Vehicle (AUV), Buongiorno model, Burgers' fluid, Hartmann number (Ha-value), Laplace transform, MATHCAD, MHD, SA-NaAlg fluid, Savonius vertical axis wind turbine, Stehfest's algorithm, Vreman model, airborne-launched AUV, autonomous underwater hovering vehicle (AUH), autonomous underwater vehicle (AUV), computational fluid dynamics (CFD), concentrated source, convergence analysis, diffuser, dimensionless frequency, dissipative particle dynamics (DPD), dynamic one equation model, electroosmotic flow, energy, entropy generation, fractional derivative, fractional model, harmony bond coefficient or spring constant (K), heat conduction, horizontal overlap ratio, hydrodynamic interaction, integral transform, large eddy simulation, magneto hydro-dynamics (MHD), modified Bessel function, nanoliquid, nanoparticles, non-fourier, non-linear thermal radiation, particle image velocimetry, plasma flow control, porosity, power coefficient, power law fluid, residual error, response amplitude operator (RAO), separation, shear stress, solution structure theorems, special third-grade liquid, stall, subgrid scale model, superposition approach, symmetric flying wing, torque coefficient, two-phase flow, unsteady flow, velocity field, vertical overlap ratio, water entry impact force, wave effects
Abstract

Summary: This book presents collective works published in the recent Special Issue (SI) entitled "Aero/Hydrodynamics and Symmetry". These works address the existence of symmetry and its breakdown in aero-/hydro-dynamics and their related applications. The presented problems are complex nonlinear, non-Newtonian fluid flow problems that are (in some cases) coupled with heat transfer, phase change, nanofluidic, and magnetohydrodynamics phenomena. The applications vary and range from polymer chain transfer in micro-channel to the evaluation of vertical axis wind turbines, as well as autonomous underwater hovering vehicles. Recent advances in numerical, theoretical, and experimental methodologies, as well as finding new physics, new methodological developments, and their limitations are presented within the scope of the current book. Among others, in the presented works, special attention is paid to validation and improving the accuracy of the presented methodologies. This book brings together a collection of inter-/multi-disciplinary works applied to many engineering applications in a coherent manner.

6. Design, Fabrication and Performance of Wind Turbines 2020.

Author

Kim, Kyung Chun and Kim, Kyung Chun

Subjects
Research & information: general, Technology: general issues, RCS reduction, annual energy production, blade geometry linearization, computational fluid dynamics (CFD), control scheme, design optimization, dynamic wind turbine model, factorial experiment design (FED), finite element analysis, flow analysis, furling, high efficiency area, limited-angle torque actuator, low-voltage ride through (LVRT), micro wind turbine, onshore wind farm, optimization, overspeed protection control (OPC), peak shaver, reshaping methods, simulated annealing algorithm, stepper motor, tip speed ratio, variable-speed pitch, wind energy centrifugal pump (WECP), wind turbine (WT), wind turbine blade, wind turbines, yaw motion, zero-voltage ride through (ZVRT)
Abstract

Summary: From small-scale vertical axis wind turbines for urban usage to large-scale horizontal axis wind turbines for offshore wind farms, design, fabrication, and optimization technologies are highly required to manage wind energy effectively. Moreover, some new opportunities, such as in wind farm design, fluid-structure interaction, aero-acoustics, fabrication methods and performance tests by experimental and computational fluid dynamics should be engaged in modern wind turbine communities. The basic objectives of this book include improving the reliability and promoting the high efficiency of wind turbines as well as their dynamic performance, reducing wind turbine-generated noise and improving power generation efficiencies through high-fidelity approaches. Students, scholars, and engineers who manage such a wide range of wind turbine scales and usages, design, fabrication, and performance test protocols for various wind turbines, are highly recommended to read this book.

7. Advances in Lubricated Bearings.

Author

Schwarze, Hubert, Hagemann, Thomas, and Schwarze, Hubert

Subjects
History of engineering & technology, Technology: general issues, CFD, Hopf bifurcation, PA6-based polyamide composites, Young's modulus, acoustic, aerostatic bearings, boundary and dry friction, compensation, computational fluid dynamics (CFD), damping ratio, design, diaphragm valve, dispersed glass and carbon fibers, experimental investigation, floating ring bearing, flooded bearing design, flow transition, graphene, heat transfer, hydrophobicity, infinite stiffness, infrared thermography, journal bearing, laminar flow, laser surface texturing, leading edge groove, lemon bearing, lithium grease, load capacity increase, load-carrying capacity, lobe bearing, lubrication, lubrication method, lubrification, maximum contact pressures and resource, metal-polymer plain bearings, misalignment, mixed friction, n/a, non-flooded bearing design, non-laminar regime, oil-whirl and oil-whip, oleophilicity, pad deformation, planet gear bearing, power loss, rotor stability, roughness, run-up simulation, semi-floating ring bearing, sliding bearings, spray-bar, structure deformation, temperature, temperature reduction, thrust bearing, tilting pad journal bearings, tilting-pad journal bearing, trailing edge groove, turbulent flow, two-phase flow cavitation, vibration analysis, wave bearing, wear, wear scar, wettability, wind turbine gearbox
Abstract

Summary: This reprint features 12 research articles that contribute to the research on lubricated bearings. The articles focus on the latest steps in understanding bearing operating behavior, its interaction with lubricants, and its role as a component in the drive train. In addition to the description of novel modeling approaches, a variety of experimental data are presented to provide interesting identification results as well as validation data for the research and engineering community.

8. Three-Dimensional Aeroacoustic Numerical Simulation of Flow Induced Noise of Mufflers.

Author

Yang, Yan and Sun, Hongling

Abstract

Mufflers are widely applied in industrial flow duct systems or internal combustion engines, to reduce the amount of noise carried by the upstream flow. Although the flow in the duct of the muffler is commonly unsteady, complex and turbulent, which generates noise by itself. The flow noise should be considered for design and optimization of the muffler. By means of a three-dimensional numerical simulation integrated CFD (computational fluid dynamics) and CAA (computational aeroacoustics), the paper investigated two typical mufflers. The first one has an expanded chamber in the duct, and the second one has the same chamber but whilst has a perforated wall between the duct and the chamber. The nonlinear acoustic solver is implemented to model noise generation and transmission from an initial statistically-steady turbulent flow, which provided by RANS (Reynolds-averaged Navier-Stokes) simulation, and to simulate the noise in near field. The radiated far-field noise of the mufflers was predicted by FW-H (Ffowcs Williams-Hawking) acoustic analogy. The mechanisms of the vortex and sound generation were revealed, and results indicate that the perforated tube muffler has much lower flow induced noise level. The solver of the numerical simulation has been parallelized with MPI, and run on a HPC cluster, due to the large computation cost. [ABSTRACT FROM AUTHOR]

Published
2014
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9. An Error Correction Solver for Linear Systems: Evaluation of Mixed Precision Implementations.

Author

Anzt, Hartwig, Heuveline, Vincent, and Rocker, Björn

Abstract

This paper proposes an error correction method for solving linear systems of equations and the evaluation of an implementation using mixed precision techniques. While different technologies are available, graphic processing units (GPUs) have been established as particularly powerful coprocessors in recent years. For this reason, our error correction approach is focused on a CUDA implementation executing the error correction solver on the GPU. Benchmarks are performed both for artificially created matrices with preset characteristics as well as matrices obtained from finite element discretizations of fluid flow problems. [ABSTRACT FROM AUTHOR]

Published
2011
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10. Solution of Supersonic Internal Flow Problems Using MFDV.

Author

A. A. Megahed, M. W. El-Mallah, and B. R. Girgis

Subjects
*FINITE element method, *ULTRASONIC waves, *NUMERICAL analysis, *GALERKIN methods, *PUBLISHING
Abstract

The FDV method was originally developed by T.J. Chung [3]- [6]. The authors developed and presented a modification to this method named MFDV method in [2]. The aim of this modification was to give the implicitness parameters a deeper physical meaning while maintaining the solution stability and robustness. In the present work the modified flowfield dependent variation method (MFDV) has been tested and verified for the solution of supersonic internal flow problems. Starting from compressible Euler flow equations and applying the MFDV method with finite element discretization, many successful supersonic internal flow problems have been reported. Special attention has been given to complex shockwave patterns. Finite element implementation has been carried out via standard Galerkin method. Good agreement has been obtained in all cases with available analytical solutions, if any, and published literatures. [ABSTRACT FROM AUTHOR]

Published
2007

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