Geophysical Fluid Dynamics Group UPC, Dep. of Applied Physics


redondo@fa.upc.es

Short Cut Contents
Xarxa de Fluids
Summer courses in Fluid Dynamics
NEW!! "INTERNATIONAL SUMMER COURSE ON NON-HOMOGENEOUS TURBULENCE. 9th - 14st June 2008, CUM-UPC Vilanova i la Geltrú. Barcelona, Spain.

Members

Students Post Doctoral Researchers Contracted personal Visitors Former members
Sites

Emil Sekula
Ana Matulka

Alejandro Carrillo

Alexei Platonov

J. M. Redondo
I. R. Cantalapiedra
Mails

G. Garzón
V. Nieves
A. Caballero
Iorga Artozqui
Hadrien Calmet

Otman Ben


Ruperto Bonet
Roberto Castilla
Joan Grau

Cristos Vassilicos
Armando Babiano
Arakel Petrosyan
Frode Hoydalsvik
Ruben Pasmantier

Maria Becerra
Pablo Medina
Angelica de León
Jesus Gabaldón
Luci C.C. Pereira
David Velasco
Margarita Diez
Mar Flexas
Margarita Flores
H. Van der Graaf
Jordi Vila
Pilar Fernández
Rosa González
Arthur Schraven
Joana Irigoyen
Guillaume Refray
Filip Ciesinski
Miguel A. Sánchez

Research description

The group on Geophysical Fluid dynamics and Turbulence' at Aplied Physics at U.P.C. ( Polytechnic University of Catalonia ) in Barcelona works mainly in the study of turbulent aspects of Geophysical and Environmental flows, Stratification and Mixing problems as well as fundamental aspects of diffusion and dispersion.
Rotating and Stratified environments as well as heat transfer and ventilation in industrialy relevant flows are also investigated by the group.
Both laboratory and Computer simulation techniques (DNS, Large Eddy Simulations (LES) and Kinematic simulations of fluid flows) are carried out by group members.
There is a strong interest on experimental techniques on fluid dynamics at laboratory scale and in field observations (Remote Sensing and in situ observations) a combination of experimental theoretical and numerical methods are used to study turbulence and mixing phenonema. Are self-similar implies that the scale at which these processes act may vary over many decades, both in space and time. On one hand Two dimensional mesoscale eddies in the ocen and in the atmosphere are investigated and their diffusion properties are used to detect and predict pollutants such as oil or tracers.
On the small scale range, turbulent environments and their effect on plankton growth and sediment transport are investigated.
The structure of the turbulent velocity field influenced by stable density interfaces is investigated in the laboratory by means of advanced image analysis; Dye concentration, shadowgraph, PIV and Particle Tracking Velocimetry are used to investigate the dominant basic instabilities that produce picnoclinic or haloclinic mixing. Both the vertical and horizontal structures are examined in several types of experiments that produce spatially non-homogeneous turbulence. One of the experiments is the classical "oscillating grid experiment", where a grid is oscilated vertically at a certain distance from a sharp density interface.
Other Laboratory experiment that produces laterally inhomogeneous mixing at the position of a sharp density interface by injecting and ejecting fluid at a small flow rate from a tube placed at one side of a large tank. These eddies are also usually observed in coastal regions from satellite SAR images. The competition between the internal wave induced velocity field and the flattening of the Reynolds stresses near density interfaces that produce strong transfers between horizontal and vertical vorticity and the characteristic length and time scales asociated to stratified and rotating flows are investigated in several experimental set-ups. Unstable flows and mixing in shock tubes dominated by Rayleigh-Taylor and Richtmeyer-Meshkov instabilities are also under study.
The group is also part of the Turbulent, Fluctuations and Diffusion group (1999,2001-SGR 00145) and shares common research lines with the Fluid Dynamics group in convection and rotation induced flows as well as in coastal hydrodynamics.

Main subjects

UPC Polytechnic University of Catalonia
Geophysical Turbulence group
redondo@fa.upc.es.
j.a.carrillo@upc.es.
Last Update (May 2008)
Dept. Fisica Aplicada, Campus Nord B5, Barcelona 08034