Rheo-NMR and velocity imaging

Callaghan, Paul T.

doi:10.1016/j.cocis.2005.10.003

Cited by 56 publications

(37 citation statements)

References 52 publications

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“…Fast MRI velocity measurements, capable of capturing transient flow effects, are of great interest in the study of fluid turbulence [1] and rheology [2]. Being able to visualize and understand rapid changes in the flow dynamics is useful, not only for comparison with modelling and simulations to validate transient flow solutions, but also for application to industrial systems, for example the transient flows of complex fluids used as cosmetic products [3,4].…”

Section: Introductionmentioning

confidence: 99%

Rapid measurement of transient velocity evolution using GERVAIS

Davies

Sederman

Pipe

et al. 2010

Journal of Magnetic Resonance

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Section: Introductionmentioning

confidence: 99%

Rapid measurement of transient velocity evolution using GERVAIS

Davies

Sederman

Pipe

et al. 2010

Journal of Magnetic Resonance

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“…Some of these, such as the use of multi-dimensional NMR relaxation are directly related to ways of manipulating the spin magnetisation , some involve the design of new magnet geometry such as the NMR-Mouse [104,105], or open access systems such as the Halbach magnet [106], others involve the development of techniques to measure non-NMR parameters such as flow and rheological properties, referred to as velocimetry MRI or Rheo-NMR [107,108], and others have proposed multi-sensor technology when NMR is associated simultaneously with other spectroscopy techniques such as NIR, impedance and ultrasound or scattering techniques [106]. Despite the development of MRI applications for food science, extrapolations to medical applications have been few, mainly because of the specificity of the different domains.…”

Section: The Futurementioning

confidence: 99%

Investigations of food colloids by NMR and MRI

Mariette¹

2009

Current Opinion in Colloid & Interface Science

118

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Since the publication of the ISO method for measurement of solid fat content using NMR relaxation at low field, the application of this technique to the characterisation of food composition and food structure on several length scales has expanded considerably.Improvements in the electronic and computational specifications of NMR spectrometers and the use of more sophisticated signal processing methods have led to several new applications, and NMR, previously recognized as a powerful technique to provide information regarding composition, is now widely used for microstructural investigations. Moreover, MRI applications have in recent years been extended from the medical field to food science and this has opened up new opportunities for the understanding of food. We examine here recent developments in these techniques, including NMR relaxation, multidimensional NMR relaxation, diffusion NMR and MRI.

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“…Applications of NMR methods in rheological investigations of complex fluids have become more and more popular over the last 20 years [1][2][3][4][5]. NMR spectroscopy can be B.…”

Section: Introductionmentioning

confidence: 99%

Transient and Steady-State Shear Banding in a Lamellar Phase as Studied by Rheo-NMR

Medronho

Olsson

Schmidt

et al. 2012

Zeitschrift Für Physikalische Chemie

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Flow fields and shear-induced structures in the lamellar (L α ) phase of the system triethylene glycol mono n-decyl ether (C 10 E 3 )/water were investigated by NMR velocimetry, diffusometry, and 2 H NMR spectroscopy. The transformation from multilamellar vesicles (MLVs) to aligned planar lamellae is accompanied by a transient gradient shear banding. A high-shear-rate band of aligned lamellae forms next to the moving inner wall of the cylindrical Couette shear cell while a low-shear-rate band of the initial MLV structure remains close to the outer stationary wall. The band of layers grows at the expense of the band of MLVs until the transformation is completed. This process scales with the applied strain. Wall slip is a characteristic of the MLV state, while aligned layers show no deviation from Newtonian flow. The homogeneous nature of the opposite transformation from well aligned layers to MLVs via an intermediate structure resembling undulated multilamellar cylinders is confirmed. The strain dependence of this transformation appears to be independent of temperature. The shear diagram, which represents the shear-induced structures as a function of temperature and shear rate, contains a transition region between stable layers and stable MLVs. The steady-state structures in the transition region show a continuous change from layer-like at high temperature to MLV-like at lower temperature. These structures are homogeneous on a length scale above a few micrometers.

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Rheo-NMR and velocity imaging

Cited by 56 publications

References 52 publications

Rapid measurement of transient velocity evolution using GERVAIS

Rapid measurement of transient velocity evolution using GERVAIS

Investigations of food colloids by NMR and MRI

Transient and Steady-State Shear Banding in a Lamellar Phase as Studied by Rheo-NMR

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