Nanometer tracer displaying nanometer vortex flow and using method thereof

A vortex flow and tracer technology, which is applied in fluid dynamics test, fluid velocity measurement, machine/structural component testing, etc., can solve problems such as few technical solutions, and achieve good tracking performance, stable tracer performance, and contrast big effect

Inactive Publication Date: 2010-01-06
新疆农业大学水利与土木工程学院
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Problems solved by technology

[0003] There are few related technical solutions in Chinese patent applications, which fail to solve similar problems, such as 200510122716.X Rare earth nanoparticles that emit light based on the principle of fluorescence energy transfer and its preparation method, involving a new type of rare earth for biomolecular marker detection and tracing Preparation of nanoparticles and their surface modification

Method used

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Examples

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Embodiment 1

[0008] Example 1: The particle size of the tracer particles is nanoscale and slightly larger than the fluid molecules, the ratio of the density to the fluid density is 0.95-1.10, and the color difference with the fluid is greater than 1.5, the contrast is obvious, and it is insoluble in the fluid.

[0009] Nano-carbon is selected as the tracer of microscopic vortex flow. The average particle size of nano-carbon particles is 1-10 nanometers. Nano-carbon is used as a tracer to display the flow of micron-scale vortex. The generation of vortex can be clearly shown through experiments , development, movement, evolution and extinction, this method of displaying micron-scale vortex flow is simple and reliable, and can provide an effective way for studying the movement mechanism of turbulent flow.

[0010] Good tracking performance: it depends on the fine particle size of the tracer particles, but the particle size should be slightly larger than that of water molecules. Tracer, the sm...

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PUM

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Abstract

The invention provides a nanometer tracer displaying a nanometer vortex flow and a using method thereof, and relates to the technical field of micro flow display of nanometer vortex of a hydromechanics experiment. The tracer grain has grain diameter in nanometer grade and is slightly larger than that of a fluid molecule, has the density ratio to the fluid between 0.95 and 1.10, color difference with the fluid larger than 1.5 and clear contrast ratio, and is not soluble in the fluid. The method comprises the following steps: dosing the tracer on the surface of the fluid; then, carrying out revolution and other fluid motion experiments; observing vortex flow image variations in the fluid; and carrying out tracing macrophotography; as the tracer has close density with the fluid, different color from the fluid, large contrast, and grain diameter which is slightly larger than the fluid molecule and cannot quickly diffuse, the tracer can clearly display the fluid movement, and has good and stable tracing performance.

Description

Technical field: [0001] The patent of the present invention relates to the technical field of microscopic flow display of micron-scale vortex in hydrodynamic experiments, especially a nano-scale tracer for displaying micron-scale vortex flow and its application method. Background technique: [0002] In the prior art, the display and observation of micron-scale vortices is the key technology to study the cause of turbulent flow. However, the flow display technology of micron-scale vortex requires the use of nano-scale display agents. At present, the best microscopic flow display technology is the particle imaging velocimetry (PIV) technology, but the particle size D of the tracer required by PIV is about 10 to 300 microns, which belongs to the micron level tracer, which is different from the picometer The grade vortex diameters belong to the same order of magnitude. Therefore, PIV technology cannot display the microscopic vortex phenomenon and vortex structure with a diamet...

Claims

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Application Information

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IPC IPC(8): G01P5/20G01M10/00
Inventor 牧振伟赵涛苏枋邱秀云李琳杨力行
Owner 新疆农业大学水利与土木工程学院
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