Full-field velocity and temperature measurements using magnetic resonance imaging in turbulent complex internal flows

Elkins, Christopher J.; Markl, Michael; Iyengar, Ananth S.; Wicker, Ryan B.; Eaton, John K.

doi:10.1016/j.ijheatfluidflow.2004.05.017

Cited by 51 publications

(28 citation statements)

References 19 publications

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“…These techniques have been very commonly used for producing visualization and investigation of flows even within non-organic structures. 13,57 The use of phase contrast magnetic resonance imaging (MRI) enables a good assessment of vortices that exist in the cardiac chamber. It is a non-invasive imaging technique that allows study of flow-related physiology and pathophysiology with good spatial and temporal resolutions.…”

Section: Introductionmentioning

confidence: 99%

Cardiac Flow Analysis Applied to Phase Contrast Magnetic Resonance Imaging of the Heart

et al. 2009

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Abstract-Phase contrast magnetic resonance imaging is performed to produce flow fields of blood in the heart. The aim of this study is to demonstrate the state of change in swirling blood flow within cardiac chambers and to quantify it for clinical analysis. Velocity fields based on the projection of the three dimensional blood flow onto multiple planes are scanned. The flow patterns can be illustrated using streamlines and vector plots to show the blood dynamical behavior at every cardiac phase. Large-scale vortices can be observed in the heart chambers, and we have developed a technique for characterizing their locations and strength. From our results, we are able to acquire an indication of the changes in blood swirls over one cardiac cycle by using temporal vorticity fields of the cardiac flow. This can improve our understanding of blood dynamics within the heart that may have implications in blood circulation efficiency. The results presented in this paper can establish a set of reference data to compare with unusual flow patterns due to cardiac abnormalities. The calibration of other flow-imaging modalities can also be achieved using this well-established velocityencoding standard.

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Section: Introductionmentioning

confidence: 99%

Cardiac Flow Analysis Applied to Phase Contrast Magnetic Resonance Imaging of the Heart

et al. 2009

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“…According to Eqs. (5) and (8) the relationship between signal intensity at a tag slice of IR-tagging pulse and temperature can be derived as follows (Elkins et al 2004):…”

Section: Simultaneous Measurement For Temperature and Velocitymentioning

confidence: 99%

“…As a result many researches assume uniform velocity profile in porous media (Elkins et al 2004). MRI can measure not only the complex pore geometry in opaque materials but also the spatially resolved temperature and velocity distributions of interstitial flow through pore structures.…”

mentioning

confidence: 99%

Noninvasive temperature and velocity mapping using magnetic resonance imaging

Jiang

Zhou

Liu

et al. 2016

J Vis

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Accurate temperature and velocity measurement of fluid is of vital importance for CO 2 Capture and Storage (CCS). The aims of this study were to evaluate the application of several magnetic resonance imaging (MRI) temperature measurement techniques in CCS and to simultaneously measure velocity and temperature distribution for flow field. First, the relations between MRI parameters including apparent selfdiffusion coefficient (D), longitudinal relaxation time (T 1 ), longitudinal equilibrium magnetization (M 0 ) and temperature for three different samples were investigated. The results show that in high magnetic strength field the linear relationship between D and temperature is better than M 0 -T and T 1 -T in terms of accuracy and sensitivity. Then we used inversion recovery tagging method to simultaneously measure temperature and velocity of water flowing through a heated vessel. Temperature measured by IR-tagging method is within a deviation of 2°C from the numerical results obtained by computational fluid dynamics.

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“…Regions 4 and 5 correspond to horizontal planes; in particular, Region 5 is located at the 180 o bend between the first and second leg, in the center plane between the two rib-endwalls. An additional set of measurements were performed in this area using PIV [12].…”

Section: Flow In a Serpentine With Oblique Ribsmentioning

confidence: 99%

Towards Rapid Analysis of Turbulent Flows in Complex Internal Passages

Iaccarino

Elkins

2006

Flow Turbulence Combust

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A novel approach to investigate turbulent flows in complex configurations is presented. It is based on the combined use of computer simulations and experimental measurements, and has the ability to produce, in a short period of time, large datasets in three-dimensional volumes. The measurements are based on magnetic resonance velocimetry whereas the computations use the immersed boundary technique. Both methods enable detailed analysis of flow fields in realistic configurations and can be used in a complementary way to identify regions of interest and perform design decisions. Direct comparisons between the experimental and numerical datasets are presented for the flow in a pipe and in a three-leg ribroughened serpentine as a first step towards a more complete validation; the current limitations of the present approach are also discussed.

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Full-field velocity and temperature measurements using magnetic resonance imaging in turbulent complex internal flows

Cited by 51 publications

References 19 publications

Cardiac Flow Analysis Applied to Phase Contrast Magnetic Resonance Imaging of the Heart

Cardiac Flow Analysis Applied to Phase Contrast Magnetic Resonance Imaging of the Heart

Noninvasive temperature and velocity mapping using magnetic resonance imaging

Towards Rapid Analysis of Turbulent Flows in Complex Internal Passages

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