Advances in Magnetic Resonance Imaging (MRI) of Flow
血流磁共振成像 (MRI) 的进展
基本信息
- 批准号:249886-2012
- 负责人:
- 金额:$ 1.82万
- 依托单位:
- 依托单位国家:加拿大
- 项目类别:Discovery Grants Program - Individual
- 财政年份:2013
- 资助国家:加拿大
- 起止时间:2013-01-01 至 2014-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Steady fluid flow at low speeds is laminar: layers of fluid slide smoothly past one another in an ordered way. When the flow becomes fast enough or when it happens in a sufficiently large vessel, the flow is turbulent: there is complicated and unpredictable mixing of the fluid. Turbulent fluid flow has fascinated scientists since the time of Leonardo da Vinci, but despite nearly 600 years of study, we are still occasionally surprised by the features of turbulence. This is a frustration for scientists and engineers, because an understanding of turbulent flow is important in the atmosphere, in rivers, through dams and turbines, around fish and submarines, in chemical plants, through rocks and inside the human body. In a quest to improve our understanding, we make measurements of fluid flow. This proposal concerns the development of improved measurements for the study of fluid flows in general, but turbulent fluid flows in particular. We will use magnetic resonance imaging (MRI) equipment, which is in principle identical to those used in hospital scans, to measure turbulent flow. MRI is a fabulous tool for the measurement of flow, because it can look inside opaque fluids like foams or slurries and because it does not disturb the flow at all - no probe or tracer need be inserted. Our particular MRI flow measurement method is unique for two reasons. The measurement time is very short (for MRI), which allows us to measure a much broader range of flow speeds than other MRI methods. The measurement time is constant for all parts of our data acquisition, which eliminates certain artefacts to which other MRI methods are prone, particularly in flows like foams, which contain a mixture of liquid and gas. In this proposal we develop some of the hardware used in our method, we extend the method to measure the character of the turbulent flow in all directions, we refine the techniques that we use to select our region of interest within the flow and we study turbulence in some fluids that no other technique can cope with. All of these developments will afford us new insight into the deceptively complicated phenomenon of turbulence.
在低速下稳定的流体流动是层流的:流体层以有序的方式平稳地彼此滑动。当流动变得足够快时,或者当它发生在足够大的容器中时,流动是湍流的:存在复杂和不可预测的流体混合。自达·芬奇时代以来,湍流就一直让科学家们着迷,但尽管研究了近600年,我们仍然偶尔会对湍流的特征感到惊讶。这让科学家和工程师感到沮丧,因为对湍流的了解在大气、河流、水坝和涡轮机、鱼类和潜艇周围、化工厂、岩石和人体内都很重要。为了提高我们的理解,我们对流体流量进行了测量。这项建议涉及发展改进的测量方法,以研究一般的流体流动,特别是湍流流动。我们将使用磁共振成像(MRI)设备来测量湍流,这种设备原则上与医院扫描中使用的设备相同。核磁共振是测量流动的绝佳工具,因为它可以观察泡沫或浆液等不透明流体的内部,而且它根本不会干扰流动--不需要插入探头或示踪剂。我们独特的MRI流量测量方法是独特的,原因有两个。测量时间非常短(对于MRI),这使我们能够测量比其他MRI方法更广泛的流速范围。我们的数据采集的所有部分的测量时间都是恒定的,这消除了其他MRI方法容易出现的某些伪影,特别是在像泡沫这样包含液体和气体混合物的流动中。在这个方案中,我们开发了我们的方法中使用的一些硬件,我们将该方法扩展到测量各个方向的湍流特性,我们改进了我们用来选择流动中感兴趣区域的技术,并且我们研究了一些其他技术无法处理的流体中的湍流。所有这些进展将使我们对看似复杂的湍流现象有了新的认识。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Newling, Benedict其他文献
Motion-sensitized SPRITE measurements of hydrodynamic cavitation in fast pipe flow
- DOI:
10.1016/j.mri.2017.12.025 - 发表时间:
2018-06-01 - 期刊:
- 影响因子:2.5
- 作者:
Adair, Alexander;Mastikhin, Igor, V;Newling, Benedict - 通讯作者:
Newling, Benedict
SPRITE MRI of bubbly flow in a horizontal pipe
- DOI:
10.1016/j.jmr.2009.01.034 - 发表时间:
2009-08-01 - 期刊:
- 影响因子:2.2
- 作者:
Sankey, Mark;Yang, Zhi;Newling, Benedict - 通讯作者:
Newling, Benedict
Newling, Benedict的其他文献
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{{ truncateString('Newling, Benedict', 18)}}的其他基金
Advancing magnetic resonance measurements of mass transport
推进质量传递的磁共振测量
- 批准号:
RGPIN-2017-04564 - 财政年份:2022
- 资助金额:
$ 1.82万 - 项目类别:
Discovery Grants Program - Individual
Advancing magnetic resonance measurements of mass transport
推进质量传递的磁共振测量
- 批准号:
RGPIN-2017-04564 - 财政年份:2021
- 资助金额:
$ 1.82万 - 项目类别:
Discovery Grants Program - Individual
Advancing magnetic resonance measurements of mass transport
推进质量传递的磁共振测量
- 批准号:
RGPIN-2017-04564 - 财政年份:2020
- 资助金额:
$ 1.82万 - 项目类别:
Discovery Grants Program - Individual
Advancing magnetic resonance measurements of mass transport
推进质量传递的磁共振测量
- 批准号:
RGPIN-2017-04564 - 财政年份:2019
- 资助金额:
$ 1.82万 - 项目类别:
Discovery Grants Program - Individual
Advancing magnetic resonance measurements of mass transport
推进质量传递的磁共振测量
- 批准号:
RGPIN-2017-04564 - 财政年份:2018
- 资助金额:
$ 1.82万 - 项目类别:
Discovery Grants Program - Individual
Advancing magnetic resonance measurements of mass transport
推进质量传递的磁共振测量
- 批准号:
RGPIN-2017-04564 - 财政年份:2017
- 资助金额:
$ 1.82万 - 项目类别:
Discovery Grants Program - Individual
Advances in Magnetic Resonance Imaging (MRI) of Flow
血流磁共振成像 (MRI) 的进展
- 批准号:
249886-2012 - 财政年份:2016
- 资助金额:
$ 1.82万 - 项目类别:
Discovery Grants Program - Individual
Advances in Magnetic Resonance Imaging (MRI) of Flow
血流磁共振成像 (MRI) 的进展
- 批准号:
249886-2012 - 财政年份:2015
- 资助金额:
$ 1.82万 - 项目类别:
Discovery Grants Program - Individual
Advances in Magnetic Resonance Imaging (MRI) of Flow
血流磁共振成像 (MRI) 的进展
- 批准号:
249886-2012 - 财政年份:2014
- 资助金额:
$ 1.82万 - 项目类别:
Discovery Grants Program - Individual
Advances in Magnetic Resonance Imaging (MRI) of Flow
血流磁共振成像 (MRI) 的进展
- 批准号:
249886-2012 - 财政年份:2012
- 资助金额:
$ 1.82万 - 项目类别:
Discovery Grants Program - Individual
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