Abstract
The main objective of this work is to present the impact of atmospheric pressure gradient on the hygrothermal transfers in porous material. In this way, a mathematical model described by driving forces of temperature, moisture content and total pressure gradient has been addressed. The non-linear partial differential equations are defined through the balance equations of mass and energy development. After that, a numerical implementation focused on the wood drying behavior is treated for one dimensional Fourier boundary conditions. In order to evaluate the pressure sensitivity, temperature and moisture content profiles are presented and compared to the ones obtained by the classical models [15,16]. Results show that the atmospheric pressure gradient may cause significant influence on the hygrothermal behavior of the porous materials especially for wood process. A significant effect, up to 15%, on moisture content profile distribution is observed.
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