植被红外特征的多孔介质模拟  

Vegetation Infrared Simulation with Porous Material

作　　者：江利锋[1] 叶宏[1] 

机构地区：[1]中国科学技术大学热科学和能源工程系,安徽合肥230027

出　　处：《计算物理》2010年第2期245-250,共6页Chinese Journal of Computational Physics

基　　金：国家自然科学基金(批准号:50402009)资助项目

摘　　要：利用流动介质在多孔材料孔隙通道内的渗流和表面蒸发与植物叶片的蒸腾作用相似的原理,设计一种多孔仿真叶片,建立多孔仿真叶片及实际叶片的理论模型,研究孔隙率、仿真叶片厚度、多孔材料固体颗粒的有效直径对仿真叶片表面温度的影响,并比较处于同样环境条件下的植物叶片与仿真叶片表面温度的变化情况,发现厚度0.5cm,孔隙率0.05,颗粒有效直径2.5mm的仿真叶片与植物叶片表面温度最接近,全天温差在3℃以内.Based on comparability of porous material seepage flow and surface evaporation with plant leaf transpiration, a kind of porous material artificial leaf is proposed. Models of artificial leaf and realistic leaf are set. Influence of porosity, thickness and particle diameter of the artificial leaf on surface temperature is discussed. According to simulation under representative ambient conditions, we found that an artificial leaf with thickness of 0.5 cm, porosity of 0.05 and particle diameter of 2.5 mm is able to simulate infrared characteristics of a realistic leaf. Surface temperature difference is within 3℃ in a day.

关 键 词：多孔仿真叶片 植物叶片 红外特征模拟 

分 类 号：E919[军事]