کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8152524 1524755 2018 46 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effective diffusion in random composites measured by NMR
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Effective diffusion in random composites measured by NMR
چکیده انگلیسی
The measuring of diffusion attenuation by nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI) is used to reveal information about the internal structure of various random magnetic composites including heterogeneous soft matter and biological tissues. The response of these materials on the applied external static and space-time varying magnetic fields encodes intrinsic dynamic correlations and depends on links between macroscopic effective diffusivity and structure on the microscopic scale. In the current work we carry out a computational analysis of the time dependent diffusion attenuation and tensor invariants and demonstrate their relation to the microscopic architectural elements while also considering Euclidean dimensionality. The proposed numerical method of hierarchical recursive iterations is efficient in the simulation of NMR (MRI) experiments in two- and three-dimensional heterogeneous magnetic media, by choosing and modelling the influence of the concentration of components of composites and internal hierarchical characteristics of physical parametres.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 466, 15 November 2018, Pages 92-105
نویسندگان
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