Exploració per autor "Oliva Llena, Asensio"
Ara es mostren els items 241-260 de 344
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Object-oriented simulation of reciprocating compressors: Numerical verification and experimental comparison
(2011-12-01)
Article
Accés restringit per política de l'editorialNumerical simulation of reciprocating compressors is important for the design, development, improvement and optimization of the elements constituting the compressor circuit. In this work, an object-oriented unstructured ... -
On a conservative solution to checkerboarding: examining the causes of non-physical pressure modes
(European Research Community on Flow, Turbulence, and Conbustion (ERCOFTAC), 2023)
Text en actes de congrés
Accés obertIn computational fluid dynamics (CFD), the checkerboard problem remains a challenging issue when employing collocated grid arrangements for complex geometries. It manifests as oscillatory and non-physical pressure modes, ... -
On a physically-consistent nonlinear subgrid-scale heat flux model for LES of buoyancy driven flows
(2018)
Text en actes de congrés
Accés restringit per política de l'editorialSmall-scale dynamics is the spirit of turbulence physics. It delivers complex mechanisms when turbulence is purely sustained by buoyancy. This takes place in Rayleigh-Bénard convection (RBC). Most of the existing RBC ... -
On a proper tensor-diffusivity model for large-eddy simulations of buoyancy driven flows
(2019)
Text en actes de congrés
Accés restringit per política de l'editorial -
On a Proper Tensorial Subgrid Heat Flux Model
(2021)
Text en actes de congrés
Accés obertIn this work, we aim to shed light to the following research question: can we find a nonlinear tensorial subgrid-scale (SGS) heat flux model with good physical and numerical properties, such that we can obtain satisfactory ... -
On coupled level set-volume of fluid approaches for numerical simulation of multiphase flows on unstructured grids
(European Research Community on Flow, Turbulence, and Conbustion (ERCOFTAC), 2023)
Comunicació de congrés
Accés obertThe Piecewise-Linear-Interface-Calculation (PLIC) reconstruction algorithm in the Volume-of-Fluid (VOF) method is widely used in numerical simulations of interfacial flows across various fields. However, a significant ... -
On Preconditioning Variable Poisson Equation with Extreme Contrasts in the Coefficients
(International Centre for Numerical Methods in Engineering (CIMNE), 2021)
Text en actes de congrés
Accés obertIt is well known that the solution by means of iterative methods of very ill-conditioned systems leads to very poor convergence rates. In this context, preconditioning becomes crucial in order to modify the spectrum of the ... -
On self-adaptive Runge-Kutta schemes with improved energy-conservation properties
(European Research Community on Flow, Turbulence, and Conbustion (ERCOFTAC), 2023)
Text en actes de congrés
Accés obertIn this paper a novel approach to the computation of the eigenbounds of the system of ordinary differential equations is presented. Afterwards, this approach is applied for different Runge-Kutta methods with various ... -
On the benefits and applications of sparse matrix-matrix product on various parallel architectures
(Parallel Computational Fluid Dynamics (ParCFD), 2022)
Text en actes de congrés
Accés restringit per política de l'editorialSparse matrix-vector multiplications are essential in the numerical resolution of partial differential equations. However, the sparse matrix-vector product is a strongly memory-bound kernel that suffers from data starving. ... -
On the blending of regularization and large-eddy simulation
(International Association for Computational Mechanics (IACM), 2014)
Text en actes de congrés
Accés restringit per política de l'editorialDirect simulations of the incompressible Navier-Stokes equations at high Reynolds numbers are not feasible because the convective term produces far too many relevant scales of motion. Therefore, in the foreseeable future, ... -
On the CFD&HT of the flow around a parabolic trough solar collector under real working conditions
(2013)
Text en actes de congrés
Accés obertParabolic trough solar collector is currently one of the most mature and prominent solar applications for production of electricity. These systems are usually located in open terrain where strong winds may occur and affect ... -
On the effect of prandtl number to subgrid-scale heat flux models
(Scipedia, 2022)
Text en actes de congrés
Accés obertEstimations of the grid size and computational cost for direct numerical simulation (DNS) and large-eddy simulation (LES) of Rayleigh-Bénard convection (RBC) are presented in the {Ra, P r} phase space. Computational ... -
On the evolution of flow topology in turbulent Rayleigh-Bénard convection
(2016-11-22)
Article
Accés obertSmall-scale dynamics is the spirit of turbulence physics. It implicates many attributes of flow topology evolution, coherent structures, hairpin vorticity dynamics, and mechanism of the kinetic energy cascade. In this work, ... -
On the evolution of Poisson solvers for extreme scale simulations
(Begell House, 2023)
Text en actes de congrés
Accés restringit per política de l'editorialIn this work, we aim to shed light to the following research question: is the complexity of numerically solving Poisson’s equation increasing or decreasing for very large DNS and LES simulations of incompressible flows? ... -
On the extension of LES methods from incompressible to compressible turbulent flows with application to turbulent channel flow
(Institute of Physics (IOP), 2016)
Text en actes de congrés
Accés obertThe objective of the present work is to validate the compressible Large-Eddy Simulation (LES) models implemented in the in house parallel unstructured CFD code TermoFluids. Our research team has implemented and tested ... -
On the extension of RANS/LES methods from incom-pressible to compressible transonic turbulent flows with SBLI
(Begell House, 2015)
Text en actes de congrés
Accés restringit per política de l'editorialIn the present work, a compressible extension of the incompressible RANS and LES models implemented in TermoFluids is carried out. The objective is to solve compressible turbulent flows, i.e. high-Reynolds and high-Mach ... -
On the fast transient spoiler deployment in a NACA0012 profile using LES techniques combined with AMR and IMB methods
(2014)
Text en actes de congrés
Accés restringit per política de l'editorial -
On the feasibility of affordable high-fidelity CFD simulations for indoor environment design and control
(2020-10-15)
Article
Accés obertComputational fluid dynamics (CFD) is a reliable tool for indoor environmental applications. However, accurate CFD simulations require large computational resources, whereas significant cost reduction can lead to unreliable ... -
On the Feasibility of CFD for Transient Air Flow Simulations in Buildings
(2019)
Text en actes de congrés
Accés restringit per política de l'editorialThe rapidly growing computational capacity hasmade CFD simulations an attractive tool for indoorenvironmental applications. The ability of CFD toperform transient simulations could be incorporatedinto model predictive ... -
On the flow past a circular cylinder from critical to super-critical Reynolds numbers: wake topology and vortex shedding
(2014)
Text en actes de congrés
Accés obert
