diffusivity

简明释义

英[ˌdɪfjuːˈsɪvɪti]美[dɪfjʊˈsɪvɪti]

n. 扩散率；[物] 扩散性

英英释义

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例句

1.The permeability, solubility and diffusivity of tritium through metals, ceramics, glasses, elastomers and polymeric materials were studied.

研究了氚在金属材料、陶瓷材料、玻璃、弹性材料和聚合材料中的溶解度系数、扩散系数和渗透率；

2.With the increase of temperature the adsorption equilibrium constants decrease while the effective diffusivity increases.

实验结果表明，有效扩散系数随温度升高而增大，吸咐平衡常数则正好相反。

3.A method to measure thermal diffusivity of opaque materials by a laser photothermal radiometry technique is introduced in this paper.

报道了一种用激光光热辐射技术测量不透明材料热扩散率的方法。

4.It was found that the barrier diffusivity depends on the diameters of coal particles the kinds of coal and the thickness of ash.

研究还发现，不同的颗粒直径、不同的煤种以及不同的灰层厚度、煤的灰层扩散系数均不同。

5.Moreover, the sample's thermal diffusivity is measured by MPR radial scanning methods. Experimental results are satisfactory.

同时，我们利用MPR径向扫描法测量了块状样品的热扩散率，得到了较好的实验结果。

6.The methods to estimate the moisture diffusivity and the absorption depth were developed for the fissure rice caused by the wet stress.

研究了湿应力开裂过程并提出了估算水分扩散系数和吸湿深度的方法。

7.Therefore, the method is a simple workable one for calculation of soil water diffusivity.

因此，三次样条函数法是计算土壤水分扩散率的一种简便可行的方法。

8.Researchers measured the diffusivity of pollutants in water to assess environmental impact.

研究人员测量了水中污染物的扩散率以评估环境影响。

9.In materials science, the diffusivity of a substance can affect its thermal conductivity.

在材料科学中，物质的扩散率可以影响其热导率。

10.The diffusivity of nutrients in soil is essential for plant growth.

土壤中养分的扩散率对植物生长至关重要。

11.The diffusivity of gases is crucial for understanding how they spread in the atmosphere.

气体的扩散率对于理解它们在大气中的传播至关重要。

12.A higher diffusivity indicates that a substance spreads more quickly.

较高的扩散率表明物质扩散得更快。

作文

Diffusivity is a fundamental concept in the fields of physics and engineering, particularly when discussing the movement of particles through various media. It refers to the ability of a substance to spread out or diffuse within another substance over time. The term is often used in the context of gases, liquids, and solids, where the rate at which molecules move from areas of high concentration to areas of low concentration is crucial for understanding various physical phenomena. In essence, diffusivity measures how quickly a substance can penetrate or disperse in a medium, and it is influenced by several factors including temperature, pressure, and the properties of both the diffusing substance and the medium itself.To illustrate the importance of diffusivity (扩散性), consider the example of a drop of ink in water. When the ink is first introduced into the water, it is concentrated in one area. Over time, due to the process of diffusion, the ink molecules will spread throughout the water, creating a uniform color. This process occurs because the ink molecules move from an area of high concentration (the drop) to areas of lower concentration (the surrounding water). The rate at which this happens is determined by the diffusivity (扩散性) of the ink in water, which can be affected by the temperature of the water. Warmer water has higher energy, causing the ink molecules to move faster and thus diffuse more rapidly.In industrial applications, understanding diffusivity (扩散性) is essential for processes such as chemical mixing, heat transfer, and mass transfer operations. For instance, in the production of pharmaceuticals, the rate at which active ingredients diffuse through solvents can significantly impact the efficacy of the final product. Engineers must carefully consider the diffusivity (扩散性) of different substances to optimize manufacturing processes and ensure quality control.Moreover, in environmental science, diffusivity (扩散性) plays a critical role in the study of pollutant dispersal in air and water. Understanding how pollutants diffuse helps scientists develop better strategies for remediation and pollution control. For example, if a toxic substance is released into a river, knowing its diffusivity (扩散性) can help predict how quickly and widely it will spread, informing cleanup efforts and public safety measures.In conclusion, diffusivity (扩散性) is a vital concept that extends across multiple disciplines, from physics to environmental science. Its implications are far-reaching, affecting everything from everyday occurrences like the mixing of ink in water to complex industrial processes and environmental management. By studying and understanding diffusivity (扩散性), we gain insights into the behavior of substances in various contexts, which ultimately enhances our ability to manipulate and control these processes for practical applications.