Collaborative Research: The leaky rake to solid plate transition on flow through biological filtering structures

合作研究：流过生物过滤结构时漏耙到实心板的过渡

基本信息

批准号：
1916154
负责人：
Christina Hamlet
金额：
$ 7.06万
依托单位：
Bucknell University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2019
资助国家：
美国
起止时间：
2019-07-15 至 2023-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1916154&HistoricalAwards=false
关键词：
Collaborative Research leaky rake solid

项目摘要

Numerous small organisms that swim, fly, smell, or feed in flow rely on branched, bristled and hairy structures that are significant to biological and biomedical applications. The movement and orientation of such bristled layers can change the behavior of the air or water flow through them such that they may act as either solid plates or leaky rakes. Understanding how animals creatively take advantage of this type of flow transition could inform the design of filters and sampling devices. Although such flows have been studied in many systems, predictive mathematical models of the leaky rake to solid plate transition remain unavailable. The goal of this project is to reveal the physical mechanisms behind this transition through mathematical modeling and experimentation. The theoretical models developed could find applications in biomedical problems such as the flow of lymph and blood through porous tissues and vascular protective layers. In terms of education and outreach, students will be trained at the interface of engineering, mathematics, and biology through interdisciplinary courses, field research, and multidisciplinary group meetings. Diverse students will be recruited through the Louis Stokes Alliance for Minority Participation (LSAMP).This research will elucidate the fundamental fluid dynamics of biological and bioinspired filtering arrays operating at the mesoscale, where inertial and viscous forces are nearly balanced. It will also reveal the fundamental physics of particle capture and exchange when advection and diffusion are nearly balanced. Two types of marine invertebrates will be examined: 1) upside-down jellyfish that drive flow through 3D bristled oral arms, and 2) sea fans that are branched into approximately 2D sheets. Modeling the leaky-to-solid transition is challenging due to the need to simultaneously resolve small-scale flow around micron-scale structures and bulk flow around centimeter-scale arrays. New mathematical models, informed by experiments, will be developed to describe the effective porosity of flexible filtering layers. Particle capture rates and concentration profiles around mesoscale filtering arrays will be quantified experimentally in organisms and physical models. Further details of chemical exchange will be resolved numerically using the immersed boundary method. In terms of biology, these organisms represent one of many examples where particle capture and nutrient uptake occur in mesoscale bristled arrays. Revealing how this strategy is advantageous contributes directly to the NSF Rules of Life. In terms of bioinspired design, these systems exhibit inherently multiscale solutions for filtering and exchange that will provide new insights into the bioinspired design of filtering structures.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

许多在流动中游泳、飞行、嗅觉或进食的小生物体依赖于分支、刚毛和毛状结构，这些结构对生物和生物医学应用具有重要意义。这种鬃毛层的运动和方向可以改变流过它们的空气或水流的行为，使得它们可以充当实心板或漏耙。了解动物如何创造性地利用这种类型的流动转变可以为过滤器和采样装置的设计提供信息。尽管已经在许多系统中研究了这种流动，但漏耙到实心板过渡的预测数学模型仍然无法获得。该项目的目标是通过数学建模和实验揭示这种转变背后的物理机制。开发的理论模型可以应用于生物医学问题，例如淋巴液和血液通过多孔组织和血管保护层的流动。在教育和推广方面，学生将通过跨学科课程、实地研究和多学科小组会议接受工程、数学和生物学交叉领域的培训。将通过路易斯斯托克斯少数民族参与联盟（LSAMP）招募多元化的学生。这项研究将阐明在中尺度上运行的生物和仿生过滤阵列的基本流体动力学，其中惯性力和粘性力几乎平衡。它还将揭示当平流和扩散接近平衡时粒子捕获和交换的基本物理原理。将检查两种类型的海洋无脊椎动物：1）颠倒的水母，通过 3D 毛茸茸的口臂驱动水流；2）分叉成大约 2D 薄片的海扇。由于需要同时解析微米级结构周围的小规模流动和厘米级阵列周围的整体流动，对泄漏到固体的转变进行建模具有挑战性。将开发基于实验的新数学模型来描述柔性过滤层的有效孔隙率。中尺度过滤阵列周围的颗粒捕获率和浓度分布将在生物体和物理模型中通过实验进行量化。化学交换的更多细节将使用浸入边界法进行数值解析。就生物学而言，这些生物体代表了中尺度鬃毛阵列中发生颗粒捕获和营养吸收的众多例子之一。揭示这种策略的优势如何直接有助于 NSF 的生命规则。在仿生设计方面，这些系统展示了固有的多尺度过滤和交换解决方案，将为过滤结构的仿生设计提供新的见解。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力优点和技术进行评估，被认为值得支持。更广泛的影响审查标准。

项目成果

期刊论文数量（4）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Multiscale flow between the branches and polyps of gorgonians

柳珊瑚枝条与息肉之间的多尺度流动

DOI：
10.1242/jeb.244520
发表时间：
2023-03
期刊：
Journal of Experimental Biology
影响因子：
2.8
作者：
Hamlet, Christina L.;Strickland, W. Christopher;Battista, Nicholas;Miller, Laura A.
通讯作者：
Miller, Laura A.

The Presence of a Substrate Strengthens The Jet Generated by Upside-Down Jellyfish

基底的存在增强了倒置水母产生的射流

DOI：
10.3389/fmars.2022.847061
发表时间：
2022-05
期刊：
Frontiers in Marine Science
影响因子：
3.7
作者：
Battista, Nicholas;Gaddam, Manikantam G.;Hamlet, Christina L.;Hoover, Alexander P.;Miller, Laura A.;Santhanakrishnan, Arvind
通讯作者：
Santhanakrishnan, Arvind

Planktos: An Agent-Based Modeling Framework for Small Organism Movement and Dispersal in a Fluid Environment with Immersed Structures

Planktos：基于代理的建模框架，用于具有浸没结构的流体环境中的小生物运动和扩散