No description available.

No description available.

No description available.

No description available.

No description available.

A comprehensive microscale model of transport phenomena in paper drying was developed. The model includes five species (free water, sorbed water, air, water vapor, fibers) in three phases: humid air, liquid, solid. AlI relevant transport mechanisms were treated: capillary transport of free water, diffusion of sorbed water, convective-diffusive transport of water vapor. Effects on drying from the hygroscopic nature of paper were included: the reduced vapor pressure and extra evaporation energy for bound water and the changes in porosity and thickness because of sorbed water removal. / Un modèle détaillé des phénomènes de transport à petite échelle a été développé pour le séchage du papier. Le modèle inclut cinq espèces (eau libre, eau sorbée, air, vapeur d'eau et fibres) et trois phases: air humide, liquide et solide. Tous les mécanismes de transport pertinents du séchage ont été traités: le transport par capillarité de l'eau libre, la diffusion de l'eau sorbée ainsi que le transport de la vapeur d'eau par convectiondiffusion. Plusieurs effets sur le séchage de la nature hygroscopique du papier ont été inclus: l'énergie supplémentaire nécessaire à l'évaporation de l'eau liée, la réduction de la pression de vapeur de l'eau liée et les changements de porosité et d'épaisseur provenant de l'enlèvement de l'eau sorbée. fr

No description available.

Thesis (Ph. D.)--Mechanical Engineering, Georgia Institute of Technology, 2008. / Committee Co-Chair: Ahrens, Fred; Committee Co-Chair: Patterson, Tim; Committee Member: Aidun, Cyrus; Committee Member: Empie, Jeff; Committee Member: Frederick, Jim.

No description available.

Current research shows that pulse combustion impingement drying is an improvement over the steady impingement drying currently in commercial use. Pulse combustion impingement has higher heat transfer rates and a lower impact on the environment. Commercialization of pulse impingement drying is the goal of the Pulsed Air Drying group at IPST. To that end the objective of this project is to develop a system that will allow researchers to measure heat transfer rates at the impingement surface from the impinging air. A water cooled impingement plate with temperature and heat flux measuring capabilities was developed which accurately measures and records the desired information. The impingement plate was tested and its results were verified by comparison with previous literature. Finally a preliminary comparison between steady and pulse combustion impingement was carried out. The study shows pulsed combustion impingement to be superior to steady impingement.