Browsing by Subject "Fluid dynamics"
Now showing items 1-20 of 159
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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 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
Restricted access - publisher's policyPressure 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 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 ... -
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 ... -
An innovative natural air-cooling system technique for temperature-rise suppression on the permanent magnet synchronous machines
(2018-01)
Article
Open Access -
A novel method to determine the discharge coefficient of constant section nozzles under compressible dynamic flow conditions
(2019-07)
Article
Restricted access - publisher's policyThe present paper introduces a novel transient experimental method employed to determine the discharge coefficient of constant section nozzles of small diameters of 1 to 3 mm and with a length/diameter ratio of around one. ... -
An SPH Formulation for Incompressible Newtonian Free Surface Flows
(Universitat Politècnica de Catalunya, 2013-06-28)
Master thesis
Open AccessThe meshless method Smoothed Particle Hydrodynamics (SPH) is one of the primarily developed numerical methods in the meshless methods family. It has been proven to work well with problems of free surface fluid flows. For ...
