Browsing by Subject "Fluid dynamics"
Now showing items 1-20 of 214
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A 8-neighbor model lattice Boltzmann method applied to mathematical-physical equations
(2016-10-26)
Article
Open AccessA lattice Boltzmann method (LBM) 9-bit model is presented to solve mathematical-physical equations, such as, Laplace equation, Poisson equation, Wave equation and Burgers equation. The 9-bit model has been verified by ... -
Active flow control for external aerodynamics: from micro air vehicles to a full aircraft in stall
(Institute of Physics (IOP), 2020-04-01)
Article
Open AccessWe investigate the aerodynamic performance of active flow control of airfoils and wings using synthetic jets with zero net-mass flow. The study is conducted via wall-resolved and wall-modeled large-eddy simulation using ... -
Active flow control on laminar flow over a backward facing step
(Institute of Physics (IOP), 2015-09-21)
Article
Open AccessIn the present study, two dimensional flow over a backward-facing step in laminar flow regime with application of active flow control (AFC) technique is analysed. The aim of the present work is to gauge the effectiveness ... -
A dynamic load balancing method for the evaluation of chemical reaction rates in parallel combustion simulations
(Elsevier, 2019-08-15)
Article
Restricted access - publisher's policyThe development and assessment of an efficient parallelization method for the evaluation of reaction rates in combustion simulations is presented. Combustion simulations where the finite-rate chemistry model is employed ... -
A fast and accurate method to solve the incompressible Navier-Stokes equations
(2013-02)
Article
Restricted access - publisher's policyPurpose: The purpose of this paper is to highlight the possibilities of a novel Lagrangian formulation in dealing with the solution of the incompressible Navier-Stokes equations with very large time steps. Design/meth ... -
A FEM-DEM technique for studying the motion of particles in non-Newtonian fluids: application to the transport of drill cuttings in wellbores
(Springer, 2015-11)
Article
Open AccessWe present a procedure for coupling the finite element method (FEM) and the discrete element method (DEM) for analysis of the motion of particles in non-Newtonian fluids. Particles are assumed to be spherical and immersed ... -
A first estimate for a pressure-retarded osmosis-driven thermosyphon
(2017-12-01)
Article
Open AccessPressure retarded osmosis (PRO) process and its significance for thermosyphon technology is discussed. In previous work the possibility to drive a thermosyphon by difference of densities from induced salinity gradients ... -
A first study on an oscillatory flow enclosed in a finite cylinder
(Universitat Politècnica de Catalunya, 2009-09-14)
Master thesis
Open AccessIn this preliminar work, an oscillatory flow contained in a closed cylinder is investigated by means of spectral methods. The problem is quite related with the Stokes boundary layer and the major phenomena belong to this ... -
A fluid-structure interaction solver for the fluid flow through reed type valves
(Institute of Physics (IOP), 2017)
Conference lecture
Open AccessSuction and discharge processes with self actuated valves have a major influence in efficiency and reliability of hermetic reciprocating compressors. Understanding the operation completely in order to enhance compressor's ... -
A level-set method for thermal motion of bubbles and droplets
(Institute of Physics (IOP), 2016)
Conference report
Open AccessA conservative level-set model for direct simulation of two-phase flows with thermocapillary effects at dynamically deformable interface is presented. The Navier-Stokes equations coupled with the energy conservation equation ... -
A level-set model for thermocapillary motion of deformable fluid particles
(2016-12-01)
Article
Open AccessA new level-set model is proposed for simulating immiscible thermocapillary flows with variable fluid-property ratios at dynamically deformable interfaces. The Navier–Stokes equations coupled with the energy conservation ... -
A low-dissipation convection scheme for the stable discretization of turbulent interfacial flow
(Elsevier, 2017-08-10)
Article
Open AccessThis paper analyzes a low-dissipation discretization for the resolution of immiscible, incompressible multiphase flow by means of interface-capturing schemes. The discretization is built on a three-dimensional, unstructured ... -
Anàlisi de les estratègies de simulació transitòria de fluxos de metall líquid en condicions de convecció mixta i sota la influència d’un camp magnètic
(Universitat Politècnica de Catalunya, 2019-05-17)
Master thesis
Restricted access - author's decisionEl present treball pretén analitzar de manera experimental el comportament de les simulacions transitòries en la resolució de problemes de flux de metall líquid en condicions de convecció mixta i sota la influència d’un ... -
Análisis del flujo de aire a través de un difusor de automóvil
(Universitat Politècnica de Catalunya, 2018-09-14)
Bachelor thesis
Open AccessThe aim of this study was to optimise a car diffuser in order to reduce fuel consumption and improve grip performance in bends, thus achieving a higher cornering speed. The optimisation has been carried out using the ... -
Análisis de modelos computacionales para la respuesta de tanques afectados por un incendio
(Universitat Politècnica de Catalunya, 2019-10-23)
Master thesis
Open AccessAnálisis de modelos computacionales para el estudio del comportamiento del fluido y del tanque para evaluar situaciones de riesgo que se pueden dar a partir de un incendio. -
Análisis fluidomecánico de campanas extractoras
(Universitat Politècnica de Catalunya, 2014-03)
Master thesis (pre-Bologna period)
Restricted access - author's decisionEste Proyecto de fin de carrera analiza el comportamiento fluidodinámico de una campana extractora de cocina común a través de los siguientes pasos: 1-Estudio experimental de las campanas extractoras más competitivas del ... -
Analysis of external and global intermittency in the logarithmic layer of Ekman flow
(2016-10-25)
Article
Open AccessExistence of non-turbulent flow patches in the vicinity of the wall of a turbulent flow is known as global intermittency. Global intermittency challenges the conventional statistics approach when describing turbulence ... -
Analytical prediction of the circumferential pressure distribution in a gear pump
(Universitat Politècnica de Catalunya / Cranfield University, 2017-09)
Master thesis
Restricted access - confidentiality agreement -
A negative reactivity feedback driven by induced buoyancy after a temperature transient in lead-cooled fast reactors
(2017-10-24)
Article
Open AccessConsideration is given to the possibility to use changes in buoyancy as a negative reactivity feedback mechanism during temperature transients in heavy liquid metal fast reactors (HLMFRs). It is shown that by the proper ... -
A new subgrid characteristic length for turbulence simulations on anisotropic grids
(2017-11-29)
Article
Open AccessDirect numerical simulations of the incompressible Navier-Stokes equations are not feasible yet for most practical turbulent flows. Therefore, dynamically less complex mathematical formulations are necessary for coarse-grained ...
