ROLAND MARTIN

CNRS Research Scientist/HDR in Geophysics

NOW, since January 2011, I am working at Department of Geo-resources and Environment of Toulouse, University Paul Sabatier (Toulouse III), Observatoire Midi-Pyrénées, 14 avenue Edouard Belin, 31400 Toulouse. E-mail : roland.martin@get.obs-mip.fr

Depuis Janvier 2011, je travaille au Laboratoire GET (Géo-ressources Environnement Toulouse), Université Paul Sabatier (Toulouse III) Observatoire Midi-Pyrénées, 14 avenue Edouard Belin, 31400 Toulouse. E-mail : roland.martin@get.obs-mip.fr

Before 2011, I was working at Department of Modeling and Imaging in Geosciences, University of Pau, France

My name is Roland Martin (IR/HDR), I am a Senior Research Scientist-HDR (Habilitation a diriger des recherches) in the Department of Modeling and Imaging in Geosciences at University of Pau, France.

VIDEO " SONDER L'INVISIBLE" “INVISIBLE PROBING” with Roland Martin, Julien Diaz and Pieyre Leloher as participants, and INRIA communication service as producer download here

RELATED SUMMARY on earthquake and wave propagation modeling download here

My research interests include the numerical study of wave propagation in geological structures, multiphase flow imaging, . I use a variational formulation of the equations of elastodynamics, and solve it using the so-called spectral-element method, a high-order version of the finite-element method, which can be shown to be very accurate at low cost, and particularly well suited to an efficient implementation on parallel computers. This work is done in collaboration with Prof. Dimitri Komatitsch (University of PAU). We apply such numerical techniques to the study of wave propagation in complex media for oil industry purposes. An effort is done also in the implementation of optimized boundary conditions (PML) for elastic wave propagation, electro-magnetics, shallow water and Navier-Stokes equations.

I also collaborate with Dimitri Komatitsch from University of Pau/CNRS/INRIA (France) and Steven D. Gedney (University of Kentucky, USA) on optimized and stabilized unsplit Perfectly Matched Layers, called unsplit Convolutional PML (C-PML) absorbing layers, for the seismic wave equation. We implemented these conditions both in differential form using a finite-difference technique in the time domain (FDTD) and in variational form using a spectral-element technique. For more details about PML and C-PML, see for instance Wikipedia about PML as well as our publications. For more details about finite differences in the time domain (FDTD), see for instance Wikipedia about FDTD. All our C-PML source codes (SEISMIC_CPML package) are available open source. Related papers can also be downloaded from SEISMIC CPML papers

I am working with Alejandro Rodriguez Castellanos (Instituto Mexicano del Petroleo/IMP-Mexico) and Francisco Sanchez Sesma (Universidad Nacional Autonoma de Mexico/UNAM-Mexico) on wave propagation in fractured media using Indirect Boundary Element methods. I am collaborating in Reconstruction and Imaging algorithms with Carlos Ortiz-Alemàn and Carlos Gamio Roffé of IMP using iterative (Projected Landweber) or stochastic (Simulated annealing, genetic algorithms) for multiphase flow measurement in fluidized beds or oil-gas-solids mixtures.

Recently I started a collaboration with Prof. Roberto Zenit of the Complex Materials Department of UNAM for the numerical simulation of vortex impacts on plates and the study of heat transfers.

Main interests:

- Numerical Wave propagation using Spectral element methods, Finite Difference and Integral Boundary Element methods

- Perfectly Matched Layers (PML) for elastic wave equations, shallow water equations, Navier Stokes equations.

- Capacitance Tomography using simulated annealing and genetic algorithms.

- Fluid Mechanics: Study of heat transfer due to Impacts of jets on plates.

With some colleagues, we have started an INRIA project called MAGIQUE-3D.

I also work with Carlos-Ortiz Aleman and Carlos Gamio Roffé from Instituto Mexicano del Petroleo, Mexico City, France, on reconstruction algorithms for multiphase flow measurement. Iterative processes like Gauss-Newton methods or stochastic techniques like Simulated annealing and Genetic algorithms provide successful dynamic 2D and 3D reconstructions. Further improvements are being performed in order to reduce computational costs in running time and memory storage.

The SEISMIC_CPML package has been downloaded by many institutions and research groups worlwide since May 2008.

Before working in Pau, I was a Senior Research Fellow in the Programa de Computacion y Matematicas Aplicadas at Instituto Mexicano del Petroleo in Mexico City.

Roland MARTIN
Laboratoire de Modélisation et d'Imagerie en Géosciences FRE 2639
Université de Pau et des Pays de l'Adour
Bâtiment IPRA - Avenue de l'Université
BP 1155
64013 Pau Cedex
FRANCE

email: roland.martin@univ-pau.fr (preferred)
Secretary (Mme Joëlle Arriulou or Mr Bruno Demoisy): (+ 33) 5 5940 7432 (please use email instead if possible)
e-fax: (+ 1) 309 403 4447 - from the USA, (309) 403 4447 - or (+ 33) 5 5940 7415

For visitors, here is how to reach our building.