...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of visualization >The flow velocity distribution from the Doppler information on a plane in three-dimensional flow
【24h】

The flow velocity distribution from the Doppler information on a plane in three-dimensional flow

机译：多普勒信息在三维流动平面上的流速分布

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In order to observe and estimate the flow of fluid in three-dimensional space, the pulsed Doppler method has been used widely. However, the velocity information acquired is only the velocity component in the beam direction of the wave even if an observation plane is formed by beam scanning. Accordingly, it is difficult to know the velocity distribution in the observation plane in tree-dimensional flow. In this paper, the new idea for processing the velocity distribution in the beam direction on an observation plane for transposing to flux distribution (flow function method) has been introduced. Further, the flow in an observation domain is divided into two kinds of flows, viz., the base flow which indicates the directivity of the flow in the observation domain and the vortex which is considered a two-dimensional flow. By applying the theory of a stream function to the two-dimensional flow, and by using the physical feature of a streamline to the base flow, the velocity component v which intersects perpendicularly to the beam direction is estimated. The flow velocity distribution in a scanning plane (observation plane) can be known from these two components of velocity, viz., beam direction component U and perpendicular component to the beam direction v. The principle was explained by an example of the blood flow measurement in normal and abnormal heart chamber, by the ultrasonic Doppler method.
机译：为了观察和估计三维空间中的流体流动，脉冲多普勒方法已被广泛使用。然而，即使通过束扫描形成观察平面，所获取的速度信息也仅仅是波的束方向上的速度分量。因此，难以知道树状流中的观察面中的速度分布。在本文中，介绍了一种处理在视平面上的光束方向上的速度分布以转换为通量分布的新思想（流动函数方法）。此外，观察域中的流动被分为两种流动，即表示观察域中流动的方向性的基本流动和被认为是二维流动的涡流。通过将流函数理论应用于二维流，并通过对基本流使用流线的物理特征，可以估算出垂直于射束方向相交的速度分量v。可以从速度的这两个分量即光束方向分量U和垂直于光束方向v的两个分量中获知扫描平面（观察平面）中的流速分布。原理以血流测量示例为例在正常和异常心腔中，通过超声多普勒方法。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号