Multiphysics modeling of vacuum drying of wood

Sadoth sandoval Torres, Wahbi Jomaa, Jean Rodolphe Puiggali, Stavros Avramidis

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28 Scopus citations

Abstract

Drying of porous media is characterized by the invasion of a gaseous phase replacing the evaporating liquid. Vacuum drying is an alternative method to alleviate discoloration for oakwood, so description of its underlying physics is important to understand this process. In this work, a coupled modeling is proposed to describe vacuum drying of oakwood at lab scale. This model describes the physics of wood-water relations and interactions with the vacuum dryer. Results provided important information about liquid and gas phase transport in wood. Water vapor and air dynamics in the chamber were simulated linking large scale (dryer) and macroscale (wood) changes during drying. We analyses results at 60-100. bar and 250-300. mbar both at 70 °C. The phenomenological one-dimensional drying model is solved by using the COMSOL's coefficient form and an unsymmetric-pattern multifrontal method. Good agreement was obtained for these drying conditions. The numerical results and experimental measures provide some confidence in the proposed model. © 2011 Elsevier Inc.
Original languageAmerican English
Pages (from-to)5006-5016
Number of pages11
JournalApplied Mathematical Modelling
DOIs
StatePublished - 1 Oct 2011
Externally publishedYes

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