论文标题
完整的CVDL方法论用于研究流体动力不稳定性
Complete CVDL Methodology for Investigating Hydrodynamic Instabilities
论文作者
论文摘要
在流体动力学中,最重要的研究领域之一是流体动力学不稳定性及其在不同流动方案中的演变。对上述不稳定性的调查与高度非线性的动态有关。当前,使用三种主要方法来理解这种现象 - 分析模型,实验和仿真 - 所有这些都主要使用人类专业知识来研究和相关。在这项工作中,我们声称并证明了这项研究工作的很大一部分可以并且应该使用深度学习(CVDL或Deep Computer-Vision)的计算机视觉领域的最新突破性进步进行分析。具体而言,我们针对特定的最新技术(例如图像检索,模板匹配,参数回归和时空预测)来定位和评估特定的最新技术,以实现它们提供的定量和定性益处。为了这样做,我们将重点放在最具代表性的不稳定性之一上,即瑞利 - 泰勒(Rayleigh-Taylor One),模拟其行为并创建开源的最新注释数据库(Rayleai)。最后,我们使用调整后的实验结果和新颖的物理损失方法来验证预测结果与实际物理现实的对应关系,以证明模型效率。在这项工作中开发和证明的技术可以用作水力动力学领域的物理学家的重要工具,用于研究各种物理系统,也可以通过将学习转移到其他不稳定性研究中。一部分技术可以轻松地应用于已经存在的模拟结果上。所有模型以及为这项工作创建的数据集,可在以下网址公开可用:https://github.com/scientific-computing-nrcn/simulai。
In fluid dynamics, one of the most important research fields is hydrodynamic instabilities and their evolution in different flow regimes. The investigation of said instabilities is concerned with the highly non-linear dynamics. Currently, three main methods are used for understanding of such phenomenon - namely analytical models, experiments and simulations - and all of them are primarily investigated and correlated using human expertise. In this work we claim and demonstrate that a major portion of this research effort could and should be analysed using recent breakthrough advancements in the field of Computer Vision with Deep Learning (CVDL, or Deep Computer-Vision). Specifically, we target and evaluate specific state-of-the-art techniques - such as Image Retrieval, Template Matching, Parameters Regression and Spatiotemporal Prediction - for the quantitative and qualitative benefits they provide. In order to do so we focus in this research on one of the most representative instabilities, the Rayleigh-Taylor one, simulate its behaviour and create an open-sourced state-of-the-art annotated database (RayleAI). Finally, we use adjusted experimental results and novel physical loss methodologies to validate the correspondence of the predicted results to actual physical reality to prove the models efficiency. The techniques which were developed and proved in this work can be served as essential tools for physicists in the field of hydrodynamics for investigating a variety of physical systems, and also could be used via Transfer Learning to other instabilities research. A part of the techniques can be easily applied on already exist simulation results. All models as well as the data-set that was created for this work, are publicly available at: https://github.com/scientific-computing-nrcn/SimulAI.