MODELING OF UNSATURATED FLOW IN ANISOTROPIC NONWOVEN MATERIALS

机译：各向异性非织造材料中非饱和流动的建模

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Product innovation in the world of nonwovens took a stiff upturn ever since the wipes were introduced to the market several years ago. Since then, many wipes, pads, napkins and gown manufacturers have been paying significant attention to modeling of capillary driven flows in unsaturated porous media. Computations Fluid Dynamics (CFD) can be employed for such modeling in various stages of the design cycle to test various configurations and shapes of non-woven multi-layered products and to identify regions exhibiting over- or under- saturated conditions resulting in potential leakage or under-performance of the product. Although the flow inside fibrous structure is mainly capillary driven, there is strong coupling with sorption phenomena frequently associated with swelling. Along come the issues of sterilization, often with steam, and of course, condensation and evaporation. In our continuous effort to improve the Fluent's product scale 'wicking model', we try to address different phenomena associated with capillary flows. Several important features, such as the capability to model anisotropic materials and to deal with dynamic contact angles, have been added to the model. A comprehensive description of the related physics together with practical examples will demonstrate its potential and value for numerical testing of nonwovens products performance.

机译：自几年前湿巾被推向市场以来，非织造布领域的产品创新一直在急剧上升。从那时起，许多擦巾，护垫，餐巾纸和睡袍制造商一直非常关注在非饱和多孔介质中毛细管驱动的流动的建模。计算流体动力学（CFD）可在设计周期的各个阶段用于此类建模，以测试非织造多层产品的各种配置和形状，并识别表现出过饱和或欠饱和条件的区域，从而导致潜在的泄漏或产品性能不佳。尽管纤维结构内部的流动主要是由毛细管驱动的，但是与经常与溶胀有关的吸附现象之间存在很强的耦合。随之而来的是灭菌问题，通常是蒸汽灭菌，当然还有冷凝和蒸发问题。为了不断改进Fluent产品规模的“芯吸模型”，我们尝试解决与毛细管流动相关的各种现象。该模型还增加了一些重要功能，例如对各向异性材料进行建模和处理动态接触角的能力。对相关物理的全面描述以及实际示例将证明其在非织造产品性能数值测试中的潜力和价值。

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来源
《International Nonwovens Technical Conference(INTC 2006); 20060925-28; Houston,TX(US)》|2006年|P.72-85|共14页
会议地点 HoustonTX(US)
作者
Peter Spicka;
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作者单位

Fluent Inc., 10 Cavendish Court, Lebanon, NH, 03766;

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会议组织
原文格式 PDF
正文语种 eng
中图分类造纸工业;
关键词
unsaturated flow; porous media; sorption; capillary pressure; nonwovens; superabsorbent;

机译：非饱和流;多孔介质;吸附;毛细压力;非织造布;超强吸收;

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MODELING OF UNSATURATED FLOW IN ANISOTROPIC NONWOVEN MATERIALS

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