PhD recruitment (30th of April 2012)
HEI in partnership with GEMTEX recruits a PhD. The project will contribute to the study of innovative sensors able to detect, and monitor thermal and mass transfers.
Company and presentation of the subject:
HEI (Hautes Etudes d?Ingénieur), a French engineering school and his research department ?Chemistry, Textile and Innovative Processes (CTIP, HEI) recruits a PhD for a period of 36 months. In partnership with several industrial companies, and integrated to the GEMTEX laboratory (GEnie des Matériaux TEXtiles) this project will contribute to the study of innovative sensors able to detect, and monitor thermal and mass transfers.
General overview and objectives:
In a natural way, evaporation is used by the body when accumulation of heat cannot be dissipated by conductive, convective, or radiative transfers. At high activity levels, or in warm conditions, skin wetness appears on the surface of the skin. This evaporation of water implies absorption of energy, leading to the decrease and the stability of the body skin and core temperature: it defines the mechanism of thermoregulation. When evaporation becomes predominant, the garment can be an obstacle to the heat and moisture transfers, since the breathability and porosity of fabrics are limited. Acting as an interface between the body and its environment, clothing implies the condensation and accumulation of liquid moisture from the skin. This phenomenon is highlighted in extremely hot and humid environments. Fire fighting requires protective clothing i.e. high insulation of the clothing system, both for thermal and waterproof resistances. During firefighter?s intervention, due to thermoregulation, condensation of moisture entrapped into the protective equipment (PPE) burn injuries by hot steam may occur burn injuries by hot steam. In other cases, for example in sports applications, it was observed that the thermal sensation is mainly affected by the liquid moisture management of underwear, caused by fast apparition of sweat. In previous studies, the development of textile sensors by a flow-metric method allowed us to measure the heat of evaporation of various liquids at ambient temperature. The main advantage is the design of a self-powered permeable flowmeter taking into account evaporative phenomena.
The aim of this study is to design, characterize and model flow-metric textile sensors to determinate precisely heat and mass transfers.
Title of the study :
Measures of heat and mass transfers by modeling flow-metric textiles sensors composed of Thermoelectric yarns.
Bac+5 and/ or Textile engineer;
Knowledge in material science, heat and mass transfers associated in materials (especially fibrous media);
Knowledge in modeling (COMSOL, Fluent) will be appreciated
The candidate is curious, autonomous and dynamic.
36 months (Nov. 2012).