Abstract This work presents a one-phase two-dimensional model describing the mass transport in an isothermal horizontal drum partially filled with silica beads and sugar cane bagasse (SCB), with air flowing in parallel to the bed surface, aiming further applications to solid-state cultivation processes (SSC). The effective diffusivities (Deff) of silica and SCB beds were experimentally determined, as well the equilibrium moisture content of the solids. Deff was of 1.67 10-9 m2/s for the silica bed and 29.2 10-9 m2/s for SCB. Classical correlations were applied to estimate the theoretical effective diffusivity in a bed of spherical (silica beads) and cylindrical (SCB) particles. Experiments were carried out in a still horizontal drum with filling degree 0.5 using low and high air flow rates and good agreement was noted between experimental and simulated results. The results obtained will be of help to model SSC processes in horizontal drums in a more realistic basis.

中文翻译：

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部分填充的水平鼓中的质量传输：建模和实验

摘要 这项工作提出了一个单相二维模型，描述了部分填充有二氧化硅珠和甘蔗渣 (SCB) 的等温水平滚筒中的传质，空气平行于床面流动，旨在进一步应用于固体-国家栽培过程（SSC）。通过实验确定二氧化硅和 SCB 床的有效扩散率 (Deff)，以及固体的平衡水分含量。二氧化硅床的 Deff 为 1.67 10-9 m2/s，SCB 为 29.2 10-9 m2/s。应用经典相关性来估计球形（二氧化硅珠）和圆柱形（SCB）颗粒床中的理论有效扩散率。实验在一个填充度为 0 的静止水平滚筒中进行。5 使用低和高空气流速，并且在实验和模拟结果之间注意到良好的一致性。获得的结果将有助于在更现实的基础上模拟水平滚筒中的 SSC 过程。