Development of high-fidelity numerical methods for turbulent flows simulation

Development of high-fidelity numerical methods for turbulent flows simulation - Francesco Capuano | Rochesterscifianimecon.com

...nalysis and data structures to analyze and solve problems that involve fluid flows ... Machine learning methods for turbulence modeling in ... ... .Computers are used to perform the calculations required to simulate the free-stream flow of the fluid, and the interaction of the fluid (liquids and gases) with surfaces defined by boundary conditions. Multi-scale nature of turbulent flows creates challenges for numerical simulations. However, the exponential growth in computer power (about two orders of magnitude every 7 years) has enabled high fidelity numerical simulations of canonical turbulent flows at moderate Reynolds numbers possible. This study focuses on developing numerical scheme based on discontinuous Galerki ... Development of high-fidelity numerical methods for ... ... . This study focuses on developing numerical scheme based on discontinuous Galerkin (DG) methods and large eddy simulation (LES) for high -fidelity compressible turbulent flow simulations around aircraft to enhance guidelines for designing next-generation low-noise aircrafts by clarifying the details of airframe noise generation. Machine learning methods for turbulence modeling in subsonic flows over airfoils Zhang Weiwei, Zhu Linyang, Liu Yilang, Kou Jiaqing School of aeronautics, Northwestern Polytechnical University, Xi'an 710072, China Reynolds-Averaged Navier-Stokes (RANS) method for high Reynolds number (Re) turbulent flows will still play a vital role in the ... High-fidelity Simulation of Turbulent Flows Prof. Farzad Mashayek ... field of turbulent reacting flow where temporal and spatial scales typically vary by ... We will then focus on numerical simulation of turbulent flows using high-order spectral element methods. To understand the impact of bubbles on turbulent flat channel flow, Bolotnov et al. (2011) performed the detached direct numerical simulation (DDNS) of two different types of bubbly flows (one with small bubbles, and the other with a large single bubble). Our research interests include the fields of fluid mechanics and numerical simulation. We work with development of numerical tools and their applicationis to engineering problems involving turbulence, unsteady aerodynamics, compressible flows and aeroacoustics. See more details in "Research Projects". With the development of computational capacity, high-fidelity simulations of PCC have been developed and significant achievements have been obtained in the recent years. In this review, the recent advances in CFD of PCC, especially in fully-resolved direct numerical simulation (DNS), point-particle DNS and large eddy simulation (LES) of PCC are summarized. The modeling section focuses on topics such as eddy viscosity models, standard K-E Models, Direct Numerical Stimulation, Large Eddy Simulation, and their applications. The measurement of turbulent fluctuations experiments in isothermal and stratified turbulent flows are explored in the experimental methods section. Richard is Chair of Computational Mechanics in the Department of Mechanical Engineering. His main interest is in high-fidelity simulation of turbulent flows and the associated noise generation in order to gain physical understanding of flow and noise mechanisms and to help assess and improve low-order models that can be employed in an industrial context. Mathematics of Large Eddy Simulation of Turbulent Flows, ... Direct numerical simulation of turbulent flows is not feasible for the fore- ... and design is clearly the next step in the development of largeeddy simulation. Progress is already being made by careful experimentation. CURRENT TRENDS IN MODELLING AND SIMULATION OF TURBULENT FLOWS S. Jakirlić 1 Special Interest Group on Turbulence Modelling - SIG15 European Research Community on Flow, Turbulence and Combustion - ERCOFTAC Computational Fluid Dynamics (CFD) has developed to a key technology which plays an important role in design, development and optimization ... The measurement of turbulent fluctuations experiments in isothermal and stratified turbulent flows are explored in the experimental methods section. Special topics include modeling of near wall turbulent flows, compressible turbulent flows, and more. Category: Science Large Eddy Simulation For Compressible Flows Research areas. Computational fluid dynamics. Direct numerical simulation of turbomachinery flows. Overview. Simulating turbomachinery flows using high-fidelity computational methods. One of the greatest challenges to modern computational fluid dynamics (CFD) ......

INFORMAZIONE

AUTRICE/AUTORE
Francesco Capuano
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9,42 MB
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Development of high-fidelity numerical methods for turbulent flows simulation.pdf

DESCRIZIONE

La tesi di dottorato è incentrata sullo sviluppo di strumenti e metodologie avanzate per la simulazione numerica di flussi turbolenti con tecniche Large-Eddy Simulation (LES) e Direct Numerical Simulation (DNS). In particolare, si propone una metodologia di avanzamento temporale innovativa di tipo Runge-Kutta (RK) capace di riprodurre le prestazioni di robustezza di metodi skew-symmetric classici con maggiore efficienza computazionale. La rigorosa trattazione teorica sviluppata nel lavoro ha permesso di ricavare nuovi schemi RK con un determinato ordine di accuratezza sulla soluzione e sulla conservazione di energia discreta. La tecnica ha mostrato di essere più efficiente degli schemi classici, fornendo, a parità di risultati, tempi di calcolo inferiori fino al 50%.

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