TY - JOUR
T1 - Modeling plain vacuum drying by considering a dynamic capillary pressure
AU - Sandoval-Torres, S.
AU - Rodríguez-Ramírez, J.
AU - Méndez-Lagunas, L. L.
PY - 2011
Y1 - 2011
N2 - A coupled drying model for wood is proposed by introducing a dynamic capillary pressure. The pressures of non-wetting phase, the wetting phase, and the capillary pressure at equilibrium has been considered as non-static; this approach includes a two-scale model. According to numerical results, liquid, water vapor and air dynamics in the chamber have strong interactions with re-homogenization in the surface, controlled by capillary forces. The results at 60-100 bar and 70 °C are discussed. The phenomenological one-dimensional drying model is solved by using the COMSOL's coefficient form and a global equation format. A good description of drying kinetics, moisture redistribution, and mass fluxes is obtained. A comprehensible transition at the fiber saturation point is well simulated.
AB - A coupled drying model for wood is proposed by introducing a dynamic capillary pressure. The pressures of non-wetting phase, the wetting phase, and the capillary pressure at equilibrium has been considered as non-static; this approach includes a two-scale model. According to numerical results, liquid, water vapor and air dynamics in the chamber have strong interactions with re-homogenization in the surface, controlled by capillary forces. The results at 60-100 bar and 70 °C are discussed. The phenomenological one-dimensional drying model is solved by using the COMSOL's coefficient form and a global equation format. A good description of drying kinetics, moisture redistribution, and mass fluxes is obtained. A comprehensible transition at the fiber saturation point is well simulated.
KW - COMSOL
KW - Dynamic capillary pressure
KW - Vacuum drying
KW - Wood
UR - http://www.scopus.com/inward/record.url?scp=80054040679&partnerID=8YFLogxK
M3 - Artículo
SN - 0352-9568
VL - 25
SP - 327
EP - 334
JO - Chemical and Biochemical Engineering Quarterly
JF - Chemical and Biochemical Engineering Quarterly
IS - 3
ER -