Multi-scale Models of the Benthic Boundary Layer

底栖边界层的多尺度模型

• 批准号: RGPIN-2015-05882
• 负责人: Stastna, Marek
• 金额: $ 3.64万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=665844
• 关键词: Multi; scale; Models; Benthic; Boundary

My research program aims to create easy to use, open source software based on cutting edge high-order numerical methods for the simulation of flow phenomena in natural waters with a focus on lakes and the coastal ocean. I, along with my HQP, use this software in high performance computing (HPC) environments (e.g. Compute Canada) to study coherent flow structures such as nonlinear waves and hydrodynamic instabilities, which often exhibit behaviour on very different length scales (tens of meters for the internal wave body, and sub centimetre scales for the hydrodynamic instabilities in the boundary layer in the wave footprint). In the detailed proposal my planned research program is divided into three Thematic Areas:***Thematic Area 1: "Boundary layer separation at the field scale", seeks to augment software tools for process studies of the bottom boundary layer so that they may seamlessly address research questions at the laboratory and the field scale.  The scientific focus is on identifying the mechanisms by which material such as sediment or dissolved oxygen concentration is transported across the bottom boundary layer.***Thematic Area 2: "Layered models and event based parametrizations", seeks to develop basin scale models for moderate sized lakes.  The three fundamental technical issues to address are how to properly represent the layers that intersect the bottom topography, how to effectively model the lake bottom (for example mud), and how to efficiently parametrize mixing events in high order models.***Thematic Area 3: "Lagrangian particle models with biological applications" seeks to develop modules for the software from Thematic Area 1 that faithfully represent the behaviour of swimming individuals (such as zooplankton).  The scientific focus is on cataloging and understanding the ways in which internal wave processes (shoaling, wave breaking) influence how swimming organisms aggregate in the natural environment.***All three Thematic Areas build on significant progress made during the past funding cycle, and benefit from established collaborations with experimentalists and field scientists.  Unique facilities and practices developed for HQP training include theoretical coursework, computational facilities and software, and experimental facilities.***The nearshore environment, while geographically a small percentage of the world's oceans both by volume and area, is an ecological giant, with high productivity for sea life in general and for the subset of species that are harvested in various fisheries (e.g. crab, oysters, lobster). The proposed research program will provide novel tools for performing process studies of the hydrodynamics of the nearshore zone, with a focus on multiple lines of converging evidence, namely multiple model types. These tools will be used to answer fundamental questions of how material is transported across the bottom boundary layer at the field scale.**

我的研究计划旨在创建基于尖端高阶数值方法的易于使用的开源软件，用于模拟自然水域中的流动现象，重点是湖泊和沿海海洋，我和我的 HQP 都使用该软件。高性能计算 (HPC) 环境（例如加拿大计算中心）中的软件，用于研究相干流结构，例如非线性波和流体动力学不稳定性，这些结构通常在非常不同的长度尺度（内部波体为数十米，亚厘米尺度）上表现出行为在详细的提案中，我计划的研究计划分为三个主题领域：***主题领域 1：“现场尺度的边界层分离”，旨在增强软件。用于底部边界层过程研究的工具，以便它们可以无缝地解决实验室和现场规模的研究问题​科学重点是确定沉积物或溶解氧浓度等物质穿过底部边界的机制。层.***主题领域2： “分层模型和基于事件的参数化”旨在开发中等规模湖泊的盆地尺度模型，需要解决的三个基本技术问题是如何正确表示与底部地形相交的层，如何有效地模拟湖底。示例泥），以及如何有效地参数化高阶模型中的混合事件。***主题领域 3：“具有生物应用的拉格朗日粒子模型”旨在为主题领域 1 的软件开发模块，忠实地代表科学重点是分类和理解内部波浪过程（浅滩、波浪破碎）影响游泳生物在自然环境中聚集的方式。***所有三个主题领域都建立在重大进展的基础上。​为 HQP 培训开发的独特设施和实践包括理论课程、计算设施和软件以及实验设施。***近岸环境，虽然在地理上是一个。的一小部分世界海洋无论从体积还是面积上来说都是一个生态巨人，对海洋生物和各种渔业中捕获的物种子集（例如螃蟹、牡蛎、龙虾）具有很高的生产力。拟议的研究计划将提供新颖的工具。用于对近岸区域的流体动力学进行过程研究，重点是多线汇聚证据，即多种模型类型，这些工具将用于回答物质如何穿过现场底部边界层的基本问题。规模。**