Spray drying of food products: 1. Simulation model
Spray drying of food products: 1. Simulation model
复制标题
食品喷雾干燥：1.模拟模型
DOI：
10.1016/s0260-8774(99)00107-7
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发表时间：
1999
影响因子：
5.5
通讯作者：
P. Jong
中科院分区：
文献类型：
--
作者：
J. Straatsma;G. Houwelingen;A. Steenbergen;P. Jong
开发了一个干燥模型NIZO DrySim，用于模拟食品工业中的干燥过程。DrySim模拟喷雾干燥器中的二维气流，并计算雾化颗粒的轨迹和干燥过程。该模型利用计算流体动力学（CFD）技术。采用k-ε湍流模型计算气相流场。液滴的干燥受到外部和内部传输现象的影响（在第一种情况下从颗粒表面到周围空气，在第二种情况下在颗粒内扩散）。对描述球形颗粒扩散过程的微分方程进行数值求解，同时求解外部传热传质方程。它表明，干燥模型是一个有效的工具，在给出如何适应工业干燥机的指示，例如，以获得更好的产品质量或减少结垢问题。
A drying model, named NIZO-DrySim is developed to simulate aspects of drying processes in the food industry. DrySim simulates the gas flow in a spray dryer in two dimensions and calculates the trajectories and the course of the drying process of the atomised particles. The model makes use of computational fluid dynamics (CFD) techniques. It utilises the k–ε turbulence model to calculate the gas flow field. The drying of droplets is influenced by both external and internal transport phenomena (from particle surface to surrounding air in the first case and diffusion within particles in the second). The differential equation that describes the diffusion process of spherical particles is solved numerically, simultaneously with the equations for external heat and mass transfer. It is shown that the drying model is an effective tool in giving indications of how to adapt industrial dryers, for example to get a better product quality or reduce fouling problems.