Presidential Young Investigators Award: Measurement of Multiphase Transport Using Magnetic Resonance Imaging

在这个研究项目中，保华将专注于 通过实验测量多相系统的性质， 解释这些测量结果， 理论模型和适当地改进模型。 的 实验测量将利用磁共振 显像 磁共振成像是一种光谱 一种非侵入性和非破坏性地获取 物种浓度，速度， 扩散率或样品内的温度。 具体领域 的研究是： 1.多孔介质中的输运过程： 计划测量局部体积平均饱和度， 多孔介质中单相流和多相流的速度 媒体 总体目标是进行直接比较 在没有 可调参数 2.颗粒沉降的结构和动力学：一系列 的模型实验计划，其中沉积的 将检查各种形状和尺寸的颗粒。 目标 是获得悬浮液的定量微观结构数据 具有不同体积分数的颗粒，从稀 通过集中，并确定效果，如果 悬浮流体性质。

In this PYI research program will concentrate on experimentally measuring the properties of multiphase systems, interpreting these measurements for comparison to current theoretical models and refining the models appropriately. The experimental measurements will utilize magnetic resonance imaging. Magnetic resonance imaging is a spectroscopic technique for noninvasively and nondestructively acquiring the spatial distribution of species concentrations, velocities, diffusivities or temperatures within a sample. Specific areas of study are: 1. Transport processes in porous media: Experiments are planned to measure local volume averaged saturations and velocities in single-phase flow and multiphase flow in porous media. The overall objective is to make a direct comparison between measured and predicted fields in the absence of adjustable parameters. 2. Structure and dynamics of particle sedimentation: A series of model experiments is planned in which the sedimentation of various shaped and sized particles will be examined. The goal is to obtain quantitative microstructural data for suspensions having different volume fractions of particles, from dilute through concentrated, and ascertaining the effect if the suspending fluid properties.