THERMO-DIFFUSION IN WOOD:X-RAY MC PROFILES ANALYSED USING A 2-D COMPUTATIONAL MODEL

摘要：

　　In this work,an original experimental device has been designed and developed to measure the moisture content (MC) profiles with non-isothermal configurations.A permanent temperature gradient is imposed along the radial direction on two faces of the sample.Thanks to an x-ray chain,the MC field evolution is determined during the experiment by x-ray absorption through the sample width.During the calibration stage,we experimentally proved that the attenuation function can be applied either to lignocellulosic or water density,using a suitable weighted factor.The experimental data are analyzed using the 2-D version of TransPore,a comprehensive computational model able to solve the coupled heat and mass transfer in porous media.As main outcome,we proved that the driving force to be used for the binary diffusion of water vapor in air (the mass fraction of water vapor) allows the evolution of the MC profiles to be nicely predicted.

关键词： moisture diffusion non-isothermal wood X-ray absorption computational model

作者: A.BOUALI R.R(E)MOND G.ALMEIDA P.PERR(E)

作者单位: Université de Lorraine,LERMAB,ENSTIB,27 rue Philippe Séguin,BP1041,88051 Epinal cedex 9,France AgroParisTech,UMR 1145 Ingénierie Procédés Aliments,1 avenue des Olympiades,91300 Massy,France Ecole Centrale Paris,LGPM,Grande Voie des Vignes,92 290 Chatenay-Malabry,France

会议类型: 国际会议

会议名称: The 18th International Drying Symposium Conference(第十八届国际干燥学术大会(IDS2012))

会议地点: 厦门

会议语种:英文

页码: 1-5

在线出版日期: 2012-01-11（万方平台首次上网日期，不代表论文的发表时间）