Acquisition of Laser Doppler Velocimeter

获取激光多普勒测速仪

• 批准号: 9622699
• 负责人: Walter Goldburg
• 金额: $ 12.61万
• 依托单位: University of Pittsburgh
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-09-15 至 1998-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9622699&HistoricalAwards=false
• 关键词: Acquisition; Laser; Doppler; Velocimeter

9622699 Goldburg This award provides support for the acquisition of a laser Doppler velocimeter for the purpose of studying turbulence in soap films. The goal of this project is to better understand two-dimensional turbulence as well as the physics of a soap film under shear. We have demonstrated that a laser Doppler velocimeter is a powerful instrument for exploring turbulence in soap films and for studying their unexpected rheological properties. %%% It follows from the basic laws that govern fluid flow, that two-dimensional (2D) turbulence differs qualitatively from its three-dimensional (3D) counterpart. Soap films are so thin relative to their lateral dimensions that, to a very good approximation, they should behave like a 2D fluid. Nevertheless there are very few experiments to support this claim. In our laboratory we have produced strong enough turbulence in a soap film that its two dimensional character becomes apparent. The instrument is one of general utility and will be used in ordinary three-dimensional turbulence as well. ***

9622699戈德堡该奖项为购买激光多普勒测速仪提供支持，以研究肥皂膜中的湍流。这个项目的目标是更好地理解二维湍流以及剪切作用下肥皂膜的物理。我们已经证明，激光多普勒测速仪是探索肥皂膜中的湍流和研究其意外流变性的有力工具。从控制流体流动的基本定律来看，二维(2D)湍流与其三维(3D)湍流具有本质的不同。相对于它们的横向尺寸，肥皂膜是如此之薄，以至于非常接近地说，它们应该表现得像2D流体。然而，支持这一说法的实验很少。在我们的实验室里，我们已经在肥皂膜中产生了足够强烈的湍流，以至于它的二维特征变得明显。该仪器具有一定的通用性，也适用于一般的三维湍流。***