TIFC : Thermal Imaging Field Characterization
The main fields of application are those involving energy conversion and storage. These studies with a strong experimental character are intended to be quantitative, in particular through inverse methods, and will lead to the understanding, characterization and multi-scale analysis of these systems.
Our team
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3 main research axes are developed within the team:
- Multispectral IR tomography for the study of multiphysical problems (MIRIT)
- Development of data analysis and processing methods (IRMA)
- Photothermal micro and nanoscopy (MINT)
In addition to advanced instruments, a work of valorization is carried out through patent applications and the creation of numerous start-ups (Thermoconcept, NeTHIS) and innovation platforms (Fahrenheit).
MIRIT
The focus is made on the development of a thermochemical tomograph for coupled measurement of temperature and concentration in the volume of materials.
Part of the work concerns the characterization of coupled mass, charge and heat transfers at the microscale within reactive flows. The team has developed several experimental benches based on microfluidics to perform measurements of concentration and heat fields in these systems in operation. It has visible and thermal cameras and microscopes working in a wide range of wavelengths, syringe pumps and potenstiotats for electrochemical measurements, as well as all the optomechanics necessary for spectroscopic imaging.
This work covers many applications ranging from chemical engineering (real-time concentration field imaging in reactors), to the characterization of energy transfers in batteries and microfluidic electrolyzers. The team also collaborates with the ICMCB and the LOF, two laboratories in Bordeaux, for the fabrication of these microsystems.
IRMA
The current work revolves around the development of quantitative processing methods for measured data. The main idea is to develop approaches based on physics when possible as well as more probabilistic approaches which have the advantage of "sorting" and reducing processing times. Indeed, it should be noted that measured data can quickly reach tens or even hundreds of GB that must be manipulated in a short time to meet real-time objectives.
In this sense, an important work is done on another family of methods concerning the reduction of data in order to project experimental, numerical or analytical data on reduced bases in which calculations can be carried out in very short times.
MINT
The current work aims at increasing the spatial resolution of the thermal microscopy device by exploring the nanometric domain through various techniques (thermal AFM, plasmonic hot spots...).
Plasmonic hot spots
The interaction between an ultrafast laser pulse and a metal typically results in the excitation of electrons in the material, which then release their energy to the grating for several picoseconds before the grating itself cools down over a period of several nanoseconds. The size of the hot spot created by the focused laser is limited by the diffraction limit.
Under certain conditions, it is possible to couple the incoming laser beam to electromagnetic waves propagating at the material interface in the form of plasmons. It is then possible to focus these plasmons in areas much smaller than the diffraction limit of the incident light. One of the objectives is to study the generation of these nanohot spots and the physics of heat transport around them to then study various interface phenomena.
PhD in progress
Hugo Boué : | Digital twin for the generation and control of acoustic and thermal fields for multi-scale and multi-physics non-destructive evaluation of materials  |
Coline Bourgès : | TomoThermoSpectroscopy for the study of heat and mass transfer in living environments |
Alejandro Canseco : | Imaging and thermal characterization of materials by scanning photo-thermal radiometry |
Clément Chassain : | Studies of the thermal properties of materials integrated in phase change memories: towards a thermal optimization of the devices |
Caroline Coin : | Study of the mechanisms of reversible solid-liquid transitions of organic and inorganic phase change materials in biosourced matrices. |
Marine Garcia : | Multiphysics characterization of a microfluidic fuel cell by synchronous detection thermospectroscopy  |
Thomas Lafargue : | Study of the behavior of materials illuminated by high power lasers |
Malo Lecorgne : | Determination of thermal methods for the understanding and characterization of energy transformation processes |
Kevin Krause : | Advanced mass transport control of PEM electrolyzers using infrared thermal imaging |
Contact
Jean-Christophe Batsale
Referee
351, cours de la Libération (Bâtiment A11)
33405 TALENCE, FRANCE
Team Members
Emmanuelle Abisset-Chavanne, Fouzia Achchaq, Jean-Christophe Batsale, Jean-Luc Battaglia, Stéphane Chevalier, Marie-Marthe Groz, Andrzej Kusiak, Jérémie Maire, Alain Sommier
