NMR velocity phase encoded measurements of fibrous suspensions
作者:
J. D. Seymour,
J. E. Maneval,
K. L. McCarthy,
M. J. McCarthy,
R. L. Powell,
期刊:
Physics of Fluids A
(AIP Available online 1993)
卷期:
Volume 5,
issue 11
页码: 3010-3012
ISSN:0899-8213
年代: 1993
DOI:10.1063/1.858709
出版商: AIP
数据来源: AIP
摘要:
Nuclear magnetic resonance (NMR) imaging is a noninvasive technique that allows velocity measurement in systems where classical techniques are not suitable due either to opacity or the presence of a solid phase. NMR velocity phase encode measurements for the flow of fiber suspensions yield quantitative data for the average flow field in the suspensions and qualitative information on the microscopic nature of the flow. Bulk translational motion causes modulation of the phase of the sample magnetization which provides information on the average velocity field within the sample. Motions on spatial and time scales that are small relative to the measurement scales cause damping of the magnetization, as reflected by signal attenuation.
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