In this study, the thermal insulation properties of nonwoven samples embedded with silica aerogel are examined. Finite element based simulations are performed using COMSOL Multiphysics and ANSYS software in order to predict the thermal performance of samples with different aerogel content. Comparison is made between samples with aerogel as insulating material with stagnant air as surrounding fluid in the fibrous material. Samples were developed with short polyethylene terephthalate (PET)-polypropylene (PP) fiber blended nonwovens. These materials were applied with aerogel granules so as to occupy 70%, 80% and 90% volume respectively. Computational predictions were made with COMSOL for both aerogel and air in similar proportions. Thermal insulation was predicted using ANSYS at 248 K–258 K temperature. Experimental measurements were also conducted at such temperatures. The results of FEM based simulation and experimental measurements showed very high correlation. The predictions can be used for theoretical determination of thermal performance in aerogel blankets used in house buildings at sub-zero temperatures.

在这项研究中，检查了嵌入二氧化硅气凝胶的非织造样品的隔热性能。使用COMSOL Multiphysics和ANSYS软件进行基于有限元的模拟，以预测具有不同气凝胶含量的样品的热性能。比较了以气凝胶为绝缘材料，以滞留空气为纤维材料中周围流体的样品。用短的聚对苯二甲酸乙二酯（PET）-聚丙烯（PP）纤维混纺非织造布开发样品。将这些材料与气凝胶颗粒一起施用，以分别占据70％，80％和90％的体积。使用COMSOL对气凝胶和空气以相似的比例进行了计算预测。使用ANSYS在248 K–258 K的温度下预测了隔热效果。在这样的温度下也进行了实验测量。基于FEM的仿真结果和实验测量结果显示出很高的相关性。该预测可用于理论确定低于零温度的房屋建筑中使用的气凝胶毯的热性能。