MRI Centre, University of New Brunswick, 8 Bailey Dr., Fredericton, NB E3B5A3, Canada.
Molecules. 2020 Dec 23;26(1):28. doi: 10.3390/molecules26010028.
Magnetic resonance imaging (MRI) is a non-invasive and non-optical measurement technique, which makes it a promising method for studying delicate and opaque samples, such as foam. Another key benefit of MRI is its sensitivity to different nuclei in a sample. The research presented in this article focuses on the use of MRI to measure density and velocity of foam as it passes through a pipe constriction. The foam was created by bubbling fluorinated gas through an aqueous solution. This allowed for the liquid and gas phases to be measured separately by probing the H and F behavior of the same foam. Density images and velocity maps of the gas and liquid phases of foam flowing through a pipe constriction are presented. In addition, results of computational fluid dynamics simulations of foam flow in the pipe constriction are compared with experimental results.
磁共振成像（MRI）是一种非侵入性和非光学测量技术，使其成为研究脆弱和不透明样品（如泡沫）的有前途的方法。MRI 的另一个关键优势是其对样品中不同核的敏感性。本文研究的重点是利用 MRI 测量泡沫通过管道收缩时的密度和速度。泡沫是通过将氟化气体吹入水溶液中产生的。这使得可以通过探测同一泡沫的 H 和 F 行为来分别测量液相和气相。本文呈现了通过管道收缩的泡沫的气相和液相的密度图像和速度图。此外，还将管道收缩中泡沫流动的计算流体动力学模拟结果与实验结果进行了比较。
