Multi-scale Models of the Benthic Boundary Layer

我的研究计划旨在创建易于使用的、基于尖端高阶数值方法的开源软件，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一起，在高性能计算(HPC)环境(如加拿大计算)中使用该软件来研究相干流动结构，如非线性波浪和水动力不稳定性，这些结构通常在非常不同的长度尺度上表现出行为(内波体为数十米，波足迹中边界层的水动力不稳定性为亚厘米尺度)。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：“场域尺度上的边界层分离”，旨在增加用于底层边界层过程研究的软件工具，以便它们可以无缝地解决实验室和野外尺度上的研究问题。科学上的重点是确定沉积物或溶解氧浓度等物质通过底部边界层传输的机制。*主题领域2：“分层模型和基于事件的参数化”，致力于开发中等规模湖泊的盆地尺度模型。要解决的三个基本技术问题是如何正确地表示与底部地形相交的层，如何有效地对湖底(例如泥浆)建模，以及如何有效地将高阶模型中的混合事件参数化。*主题区3：具有生物应用的拉格朗日粒子模型试图从主题区1为软件开发模块，以忠实地表示游泳个体(如浮游动物)的行为。科学的重点是编目和理解内波过程(浅滩，浅滩，浅滩)的方式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上一个资金周期取得的重大进展的基础上，并受益于与实验者和实地科学家的既定合作。为HQP培训开发的独特设施和做法包括理论课程、计算设施和软件以及实验设施。*近岸环境虽然在地理上占世界海洋体积和面积的一小部分，但是一个生态巨人，对一般海洋生物和在各种渔业(例如螃蟹、牡蛎、龙虾)捕捞的物种亚类具有高生产力。拟议的研究方案将为开展近岸区水动力学过程研究提供新的工具，重点放在多条汇聚证据线上，即多种模型类型。这些工具将被用来回答基本问题，即物质如何在现场尺度上穿过底部边界层。**

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.**