Transport Processes in WoodSpringer Science & Business Media, 6 de dez. de 2012 - 248 páginas This book has a similar subject content to the author's previous Flow in Wood but with substantial updating due to the abundance of research in the wood science field since 1971. Several different concepts have been introduced, particularly in regard to wood-moisture relation ships. The role of water potential in the equilibria between wood and its humid and moist environments is considered. Two theories are introduced to explain the nonisothermal transport of bound water in the steady and unsteady states. As in the former text, the wood-. structure relationship is emphasized . . The author is especially grateful to Dr. C. Skaar for his careful and critical review of much of the manuscript and for the productive dis cussions of many of the concepts. Dr. T. E. Timell, the series editor, rendered major assistance in the preparation of Chap. 2 and in his editing of the manuscript. The author wishes to thank Dr. W. A. Cote, Mr. A. C. Day, and Mr. J. J. McKeon for providing electron micro graphs, Mr. G. A. Snyder for his photography of much of the art work, Dr. C. H. de Zeeuw for his advice in the field of wood anatomy, and Ms. Mary M. Siau for her careful rendition of the art work. Apprecia tion is extended to Miss Judy A. Barton and Mrs. Stephanie V. Micale for their work in typing and checking the manuscript. Mr. J. A. |
Conteúdo
1 | |
Permeability | 63 |
Capillary and Water Potential | 105 |
Thermal Conductivity | 132 |
SteadyState Moisture Movement | 149 |
8 | 164 |
UnsteadyState Transport | 175 |
244 | |
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Termos e frases comuns
approximately assumed average pressure bordered pit pairs bound water bound-water cal/(cm calculated from Eq cell wall cell-wall substance cellulose chemical potential cm Hg cm² cm²/s cm³ cross section cylindrical D₁ darcy Darcy's law decreases density diameter diffusion coefficient dry-bulb temperature drying earlywood equation equilibrium fiber saturation point flow rate flux fraction free water g/cm³ gradient hardwoods heartwood heat hemicelluloses illustrated in Fig increase latewood layer length lignin liquid lumens M₁ measured microfibrils moisture content oven-dry P₁ parallel-sided body parenchyma partial vapor pressure penetration permeability Petty Picea Pinus pit aspiration pit membrane pit openings plot porosity radial radius ratio relative humidity resistance sapwood saturated vapor saturated vapor pressure shrinkage Siau Skaar softwoods sorption isotherm specific gravity Stamm surface tension tangential temperature thermal conductivity thickness torus tracheids transverse unsteady-state values velocity vessels viscous volume volumetric water potential wet-bulb wood specimen дх