Browsing by Subject "Fluid mechanics"
Now showing items 1-20 of 339
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3D numerical models using a fluid or a solid formulation of FSW processes with a non-cylindrical pin
(Springer, 2015-12)
Article
Open AccessFriction Stir Welding (FSW) process is a relatively recent welding process (patented in 1991). FSW is a solid-state joining process during which materials to be joined are not melted. During the FSW process, the behaviour ... -
3D numerical simulation of a jet engine axial compression stage
(Universitat Politècnica de Catalunya, 2015-09-14)
Bachelor thesis
Open AccessThe aim of this work is to undertake three-dimensional simulation of a compression stage of a jet engine axial compressor in order to study the air flow, assess blade performance at various working conditions, and validate ... -
A 3-D volume-of-fluid advection method based on cell-vertex velocities for unstructured meshes
(Elsevier, 2014-05-01)
Article
Restricted access - publisher's policyA new geometrical Volume-of-Fluid (VOF) method for capturing interfaces on three-dimensional (3-D) Cartesian and unstructured meshes is introduced. The method reconstructs interfaces as first- and second-order piecewise ... -
A 3D low-order panel method for unsteady aerodynamic problems
(2010)
Research report
Open AccessAn unsteady low-order panel method for three-dimensional subsonic analyses is presented. The method, which is based on well-established techniques in computational aerodynamics, is intended to achieve a cost-effective ... -
A conservative overlap method for multi-block parallelization of compact finite-volume schemes
(Elsevier, 2017-12)
Article
Open AccessA conservative approach for MPI-based parallelization of tridiagonal compact schemes is developed in the context of multi-block finite-volume methods. For each block, an enlarged linear system is solved by overlapping a ... -
A finite-volume/level-set interface capturing method for unstructured grids: Simulations of bubbles rising through viscous liquids
(WIT Press, 2014)
Conference report
Open AccessA numerical method is developed for simulating two-phase flows with moving inter-phase boundaries, which is integrated in a finite-volume framework on collocated unstructured grids of arbitrary element type. The location, ... -
A hybrid parallel numerical model for wave-induced free-surface flow
(MDPI, 2021-10-04)
Article
Open AccessAn advanced numerical model is presented for the simulation of wave-induced free-surface flow, utilizing an efficient hybrid parallel implementation. The model is based on the solution of the Navier–Stokes equations using ... -
A level-set aided single-phase model for the numerical simulation of free-surface flow on unstructured meshes
(Elsevier, 2016-11-25)
Article
Open AccessA new single-phase scheme for the numerical simulation of free-surface problems on 3-D unstructured meshes is presented. The flow field is obtained from the discrete solution of the incompressible Navier-Stokes equations, ... -
A mechanism for streamwise localisation of nonlinear waves in shear flows
(2015-09-01)
Article
Open AccessWe present the complete unfolding of streamwise localisation in a paradigm of extended shear flows, namely two-dimensional plane Poiseuille flow. Exact solutions of the Navier-Stokes equations are computed numerically and ... -
A modified lattice Boltzmann approach based on radial basis function approximation for the non-uniform rectangular mesh
(2024-11)
Article
Restricted access - publisher's policyWe have presented a novel lattice Boltzmann approach for the non-uniform rectangular mesh based on the radial basis function approximation (RBF-LBM). The non-uniform rectangular mesh is a good option for local grid refinement, ... -
A numerical method for computing unstable quasi-periodic solutions for the 2-D Poiseuille flow
(1999)
Article
Open Access -
A physical mechanism of TANGO1-mediated bulky cargo export
(2020-11-10)
Article
Open AccessThe endoplasmic reticulum (ER)-resident protein TANGO1 assembles into a ring around ER exit sites (ERES), and links procollagens in the ER lumen to COPII machinery, tethers, and ER-Golgi intermediate compartment (ERGIC) ... -
A power flow analysis of a double-deck circular tunnel embedded in a full-space
(2014-02)
Article
Restricted access - publisher's policyThe purpose of the present investigation is to obtain the mean power flow radiated by a double-deck circular tunnel and compares it to the one radiated by a simple circular tunnel. To achieve this, a harmonic line load is ... -
A second-order semi-lagrangian particle finite element method for fluid flows
(Springer, 2019-01-01)
Article
Open AccessIn this paper, a second-order SL-PFEM scheme for solving the incompressible Navier–Stokes equations is presented. This scheme is based on the second-order velocity Verlet algorithm, which uses an explicit integration for ... -
A theoretical and experimental study of horizontal air-water two-phase flow with a spool piece
(Universitat Politècnica de Catalunya / Politecnico di Torino, 2010)
Master thesis (pre-Bologna period)
Open AccessDesarrollo de instrumentación especializada y desarrollo de algoritmos especiales capaces de interpertar las señales de medida del flujo bifásico. Combinaciones de diferentes instrumentos (Spool Piece) serán analizados y ... -
A theoretical and experimental study of horizontal air-water. Two-phase flow with a spool piece
(Universitat Politècnica de Catalunya / Politecnico di Torino, 2010)
Master thesis (pre-Bologna period)
Open AccessThis Master Thesis has been carried out by Luis Mora Vallejo and Jacobo Zegrí Reiriz. We are both two Spanish students who are studying Engineering in the Universitat Politècnica de Catalunya (UPC) in the engineer‟s school ... -
A two-step monolithic method for the efficient simulation of incompressible flows
(2014-01)
Article
Restricted access - publisher's policyWe propose a simple technique for improving computationally the efficiency of monolithic velocity–pressure solvers for incompressible flow problems. The idea consists in solving the discrete nonlinear system of governing ... -
AAR-based decomposition method for limit analysis
(Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2014)
Conference lecture
Open Access -
Active flow control of airfoils via multi-sweeping jets at ultra low Reynolds numbers
(Universitat Politècnica de Catalunya, 2023-07-13)
Master thesis
Open AccessThe primary focus is on implementing multiple sweeping jets to eliminate the requirement for high-lift equipment with mechanical components, which are at risk for mechanical failures and increase weight due to redundant ... -
Adaptive breakwaters with inflatable elements for coastal protection. Preliminary numerical estimation of their performance
(2022-05)
Article
Open AccessExcessive erosion of sand beaches defines a serious problem worldwide and is particularly pronounced in the Mediterranean region. One of the typical mea- sures for alleviating this erosion consists in building rigid ...
