Wetting of Elastic Fibres: A Novel Immersed Boundary-Lattice Spring-Lattice Boltzmann Simulation Approach

弹性纤维的润湿：一种新颖的浸入式边界晶格弹簧晶格玻尔兹曼模拟方法

基本信息

批准号：
EP/P007139/1
负责人：
Halim Kusumaatmaja
金额：
$ 12.84万
依托单位：
Durham University
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2017
资助国家：
英国
起止时间：
2017 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FP007139%2F1
关键词：
Wetting Elastic Fibres Novel Immersed

项目摘要

Fibrous structures are versatile materials. They are abundant in nature, as observed in feathers, hairs, spider webs and adhesive pads of insects. They are also widely exploited in engineered systems, from the familiar examples of papers and textiles to high-precision micro- and nano-technologies. For many fibrous materials, their interaction with liquids is of paramount importance. Due to the small size of the fibres, capillary action (as observed e.g. in the drawing up of liquids in plants) often plays the dominant role. Furthermore, the action of capillarity deforms the fibres, which results in an opposing force due to elasticity. This competition between elasticity and capillarity - elastocapillarity - finds its relevance in a wide range of applications, including liquid penetration in wipes and nappies, and the clumping of hairs in the tarsi of insects and of barbules in marine bird feathers.Despite the numerous industrial applications and common occurrence in nature, our understanding of elastocapillary response of wet fibres is still very limited. Recent experiments suggest that pattern formation in nanostructures can be manipulated by elastocapillary dynamics; the capture of drops and their splashing, of relevance to the application of pesticides or herbicides among others, depend on the fibre geometry and flexibility. These are just a few of many elastocapillary phenomena ripe for investigations, especially using computer simulations, since the intricate interplay between fibre geometry, elasticity and capillarity quickly makes analytical treatments intractable. Unfortunately, simulation methods that can capture solid deformation, flow of liquids, and capillary forces are currently not available. Thus, it is my aim in this project is to deliver a numerical platform able to tackle such a challenge. This project is rooted in my recent research advances in simulation techniques for wetting phenomena. As a proof of principle, to demonstrate that the novel method can capture wetting dynamics on soft materials, I will examine the spreading of small droplets on two elastic fibres oriented at various angles with respect to each other, and I will study the removal of these droplets under the action of a body force such as gravity. These are paradigmatic examples for understanding the arrangement and cleaning properties of natural and synthetic wet fibre assemblies.My new simulations will be validated against experimental data provided by Procter and Gamble, where wetting of elastic fibres is relevant for many of their products, ranging from adsorbent materials (including nappies and wipes) to personal hygiene products (e.g. shampoos and laundry detergents).If successful, my novel approach will open an unprecedented route to model static and dynamic elastocapillary phenomena embedded in complex geometries. As such, it will advance our understanding of elastocapillarity, and help channel fundamental scientific insights into design principles for practical applications.

纤维结构是通用的材料。它们本质上很丰富，如羽毛，头发，蜘蛛网和昆虫的粘合剂垫中所观察到的那样。从熟悉的论文和纺织品示例到高精度的微观和纳米技术，它们也被广泛利用。对于许多纤维材料，它们与液体的相互作用至关重要。由于纤维的尺寸很小，毛细作用（如在植物中液体的绘制中所观察到的那样）通常起主要作用。此外，毛细血管的作用变形纤维，这会导致弹性引起的对立力。弹性和毛细血管之间的这种竞争 - 弹性毛细血管 - 在广泛的应用中找到了相关性，包括湿巾和尿布中的液体渗透，以及昆虫和海洋鸟羽毛中虫的毛发块的结块。最近的实验表明，纳米结构中的模式形成可以通过弹性毛细血管动态来操纵。捕获液滴及其溅出，与农药或除草剂的应用相关的捕获取决于纤维的几何形状和柔韧性。这些只是用于研究的许多弹性毛细血管现象中的几个，尤其是使用计算机模拟，因为纤维几何形状，弹性和毛细血管之间的复杂相互作用很快就使分析治疗变得棘手。不幸的是，目前尚不可用的模拟方法可以捕获固体变形，液体流动和毛细作用力。因此，我在这个项目中的目的是提供一个能够应对这种挑战的数值平台。该项目源于我最近在润湿现象的模拟技术方面的研究进展。作为原理的证明，为了证明这种新方法可以捕获柔软材料上的润湿动力学，我将检查小滴在两个彼此之间以各个角度定向的弹性纤维上的传播，我将研究在重力等体力的作用下去除这些液滴。 These are paradigmatic examples for understanding the arrangement and cleaning properties of natural and synthetic wet fibre assemblies.My new simulations will be validated against experimental data provided by Procter and Gamble, where wetting of elastic fibres is relevant for many of their products, ranging from adsorbent materials (including nappies and wipes) to personal hygiene products (e.g. shampoos and laundry detergents).If successful, my新颖的方法将为嵌入复杂几何形状中的静态和动态弹性现象建模前所未有的途径。因此，它将提高我们对Elastocallarity的理解，并有助于将基本的科学见解引入实践应用的设计原理。

项目成果

期刊论文数量（10）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Harnessing energy landscape exploration to control the buckling of cylindrical shells

DOI：
10.1038/s42005-019-0251-4
发表时间：
2019-10
期刊：
Communications Physics
影响因子：
5.5
作者：
Jack R. Panter;Junbo Chen;Teng Zhang;H. Kusumaatmaja
通讯作者：
Jack R. Panter;Junbo Chen;Teng Zhang;H. Kusumaatmaja

Wetting of phase-separated droplets on plant vacuole membranes leads to a competition between tonoplast budding and nanotube formation.

DOI：
10.1073/pnas.2024109118
发表时间：
2021-09-07
期刊：
Proceedings of the National Academy of Sciences of the United States of America
影响因子：
11.1
作者：
Kusumaatmaja H;May AI;Feeney M;McKenna JF;Mizushima N;Frigerio L;Knorr RL
通讯作者：
Knorr RL

Multifaceted design optimisation for superomniphobic surfaces

超全疏表面的多方面设计优化