Now showing items 1-20 of 29

• #### A complex storm system in Saturn's north polar atmosphere in 2018 ﻿

(Springer Nature, 2019-10-21)
Article
Open Access
Saturn’s convective storms usually fall in two categories. One consists of mid-sized storms ~2,000¿km wide, appearing as irregular bright cloud systems that evolve rapidly, on scales of a few days. The other includes the ...
• #### Boundary layer flow control using synthetic jets on the flow over a NACA 0012 airfoil ﻿

(2017)
Conference report
Restricted access - publisher's policy
Numerical simulations of the ﬂow control using a synthetic jet are presented. The ﬂow considered is around a NACA 0012 airfoil at Re = 5000 and the actuator is located at 6% of the chord from the leading edge. This work ...
• #### ³Cat-4 Mission: a 1-unit cubesat for earth observation with a L-band radiometer and a GNSS-reflectometer using software defined radio ﻿

(2019)
Conference lecture
Restricted access - publisher's policy
Global Navigation Satellite System Reflectometry and L-band microwave radiometry have been used for soil moisture, biomass, and cryosphere studies. Combining both technologies in a low-power and cost-effective solution ...
• #### Direct numerical simulation of a differentially heated cavity of aspect ratio 4 with Rayleigh numbers up to 10(11) - Part I: Numerical methods and time-averaged flow ﻿

(2010-01-31)
Article
Restricted access - publisher's policy
A set of direct numerical simulations of a differentially heated cavity of aspect ratio 4 with adiabatic horizontal walls is presented. The five configurations selected here (Rayleigh numbers based on the cavity height ...
• #### Direct numerical simulation of a differentially heated cavity of aspect ratio 4 with Rayleigh numbers up to 10(11) - Part II: Heat transfer and flow dynamics ﻿

(2010-01-31)
Article
Restricted access - publisher's policy
This is the second of a two-part paper on five direct numerical simulations of a differentially heated cavity of aspect ratio 4 with adiabatic horizontal walls (Rayleigh numbers based on the cavity height. The numerical ...
• #### DNS of turbulent natural convection flows on the MareNostrum supercomputer ﻿

(2009)
Article
Restricted access - publisher's policy
A code for the direct numerical simulation (DNS) of incompressible turbulent flows that provides a fairly good scalability for a wide range of computer architectures has been developed. The spatial discretization of the ...
• #### Exploring the performance of a miniature 3D wind sensor under extreme martian winds up to the dust devil scale ﻿

(2019)
Conference report
Open Access
The objective of this paper is to explore the performance of a miniature 3D spherical wind sensor for Mars atmosphere, working under extreme wind speeds, up to the Dust Devil scale. The experimental campaign has been made ...
• #### Fluid dynamics and heat transfer in the wake of a sphere ﻿

(2019-04)
Article
Restricted access - publisher's policy
Direct numerical simulation and large-eddy simulation have been performed for a heated sphere at Reynolds numbers of $Re=1000$ and $Re=10^4$, respectively. The Prandtl number for both simulations has been $Pr=0.7$. ...
• #### FONAMENTS D' INFORMÀTICA (Examen 2n quadrimestre, 1r parcial) ﻿

(Universitat Politècnica de Catalunya, 2011-04-11)
Exam
• #### FONAMENTS D' INFORMÀTICA (Examen 2n quadrimestre, 1r parcial) ﻿

(Universitat Politècnica de Catalunya, 2011-04-11)
Exam
• #### From extruded-2D to fully-3D geometries for DNS: a multigrid-based extension of the Poisson solver ﻿

(2010)
Article
Restricted access - publisher's policy
Direct numerical simulation (DNS) of incompressible flows is an essential tool for improving the understanding of the physics of turbulence and for the development of better turbulence models. The Poisson equation, the ...
• #### Heuristics of node selection criteria to assess robustness of world airport network ﻿

(2017-06-14)
Article
Open Access
The world airport network (WAN) is one of the networked infrastructures that shape today's economic and social activity, so its resilience against incidents affecting the WAN is an important problem. In this paper, the ...
• #### Hybrid MPI+OpenMP parallelization of a Navier-Stokes solver for large-scale DNS ﻿

(2011)
Conference lecture
Restricted access - publisher's policy
This work presents a parallel Navier-Stokes solver for the large-scale direct numerical simulation (DNS) of incompressible flows with one periodic direction. It is based on a scalable Poisson solver that combines an FFT ...
• #### Hybrid MPI+OpenMP parallelization of an FFT-based 3D Poisson solver that can reach 100000 CPU cores ﻿

(2011)
Conference report
Open Access
This work is devoted to the development of efficient parallel algorithms for the direct numerical simulation (DNS) of incompressible flows on modern supercomputers. A Poisson solver for problems with one uniform periodic ...
• #### Large Eddy Simulation of airflow in a single family house ﻿

(2010)
Conference lecture
Restricted access - publisher's policy
This work is addressed to contribute to the progress in the determination of indoor air flow in buildings. The air flow in such environments is caused by natural convection, stack and wind effects, infiltration of ambient ...
• #### Modelization of heat transfer and fluid dynamics in solar power towers ﻿

(2011)
Conference lecture
Open Access
• #### Noise Radiated by an Open Cavity at Low Mach Number ﻿

(2018)
Conference report
Restricted access - publisher's policy
The present work focuses on the study of noise generation and radiation of unsteady laminar flow over an open three dimensional cavity at low Mach number, that is of interest to understand noise generation mechanisms in ...
• #### Noise radiated by an open cavity at low Mach number: Effect of the cavity oscillation mode ﻿

(2019-09-17)
Article
Open Access
The present work focuses on the study of noise generation and radiation of an infinite open three-dimensional cavity at low Mach number with laminar upstream conditions that is of interest to understand noise generation ...
• #### Numerical simulation of turbulence at lower costs: regularization modeling ﻿

(2011)
Conference lecture
Restricted access - publisher's policy
This work is devoted to the development of efficient methods for the numerical simulation of incompressible flows on modern supercomputers. Direct simulation of the Navier-Stokes equations is nowadays an essential tool ...
• #### Numerical study of heat transfer from a synthetic impinging jet with a detailed model of the actuator membrane ﻿

(2019-02-02)
Article
Restricted access - publisher's policy
Synthetic jets are produced by the oscillatory movement of a membrane inside a cavity, causing the fluid to enter and leave through a small orifice. The present study is focused on investigating the cooling capabilities ...