Development of a Closure for Passive Scalar Variance in Turbulent Flow

摘要 提案编号： CTS-9531398 主要研究者：Durbin 这项工作的目的是把现有的湍流弥散理论，基础实验的结果和全面的数据，从数值模拟承担后的问题，开发工程模型的标量方差。 标量方差在湍流燃烧中起着核心作用，并与环境污染和传热问题有关。 在基础科学方面，标量涨落是理解湍流混合机制的基础。标量耗散在模拟混合中起着核心作用，但目前的模型方程有已知的缺陷。 这是一项工作，将采取新的眼光在现有的模型，根据最近的实验和模拟，并将扩展数据库与额外的模拟。 这项工作应提供显着的见解的方差建模。 ***

ABSTRACT Proposal Number: CTS-9531398 Principal Investigator: Durbin The objective of this work is to bring existing theories of turbulent dispersion, results of basic experiments and comprehensive data from numerical simulations to bear upon the problem of developing engineering models of scalar variance. Scalar variance plays a central role in turbulent combustion and bears upon problems in environmental pollution and heat transfer. In terms of fundamental science, scalar fluctuations are basic to understanding the mechanisms of turbulent mixing. Scalar dissipation plays a central role in modeling mixing, yet current model equations have known deficiencies. This is a work will take a fresh look at the existing models, in light of recent experiments and simulations and will extend the data base with additional simulations. This work should provide significant insights into the modeling of the variance. ***