Video Experimental Relacionado
Updated: Apr 19, 2026
09:01
High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings
Published on: April 16, 2017
8.0K
Spiropyran fotostimulado para la visualización instantánea de la distribución del campo térmico y el patrón de flujo
Yahui Chen1, Yefei Liu1, Sheng Lu1
1State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 211816, China.
Journal of the American Chemical Society
|October 30, 2020
Resumen
Los investigadores visualizaron la convección termocapillar utilizando un nuevo indicador fotostimulado, el espiropirano con unidades de benzotiazol (BS1-SP). Este método ofrece información de alta resolución y en tiempo real sobre los patrones de temperatura y flujo en los sistemas de evaporación.
Área de la Ciencia:
- Dinámica de fluidos
- Termohidrodinámica
- Ciencias de los materiales
Sus antecedentes:
- La convección termocapillar es crucial en aplicaciones fundamentales e industriales.
- El monitoreo en tiempo real de los flujos durante la convección requiere técnicas avanzadas de imagen.
Objetivo del estudio:
- Desarrollar y utilizar una nueva herramienta de imagen para visualizar la convección termocapillar.
- Para lograr una alta resolución espacial y temporal en la observación de la dinámica de la superficie.
Principales métodos:
- Se utilizó un espiropirano con unidad de benzotiazol (BS1-SP) como indicador fotostimulado.
- Simultáneamente se visualiza la distribución instantánea de la temperatura y los patrones de flujo en una superficie de disolvente volátil.
Principales resultados:
- Alcanzó una alta resolución espacial y temporal en la imagen de la dinámica de convección.
- Con éxito visualizado la interacción de la temperatura y los patrones de flujo en tiempo real.
Conclusiones:
- BS1-SP sirve como una herramienta eficaz para el estudio de la autoorganización dinámica en los sistemas de evaporación.
- El método desarrollado proporciona información valiosa sobre la termohidrodinámica y ofrece un nuevo enfoque para el análisis del comportamiento del flujo.
Videos de Conceptos Relacionados
02:44Heating and Cooling Curves
29.1K
When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance,...
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance,...
29.1K
01:07Laminar and Turbulent Flow
12.2K
Fluid dynamics is the study of fluids in motion. Velocity vectors are often used to illustrate fluid motion in applications like meteorology. For example, wind—the fluid motion of air in the atmosphere—can be represented by vectors indicating the speed and direction of the wind at any given point on a map. Another method for representing fluid motion is a streamline. A streamline represents the path of a small volume of fluid as it flows. When the flow pattern changes with time, the...
12.2K
01:12Heat Flow and Specific Heat
8.0K
Heat is a type of energy transfer that is caused by a temperature difference, and it can change the temperature of an object. Since heat is a form of energy, its SI unit is the joule (J). Another common unit of energy often used for heat is the calorie (cal), which is defined as the energy needed to change the temperature of 1 g of water by 1 °C, specifically between 14.5 °C and 15.5 °C, since the energy needed shows a slight temperature dependence. Another commonly used unit is...
8.0K
01:28Irrotational Flow
1.3K
Irrotational flow is characterized by fluid motion where particles do not rotate around their axes, resulting in zero vorticity. For a flow to be irrotational, the curl of the velocity field must be zero. This imposes specific conditions on velocity gradients. For instance, to maintain zero rotation about the z-axis, the gradient condition:
1.3K
01:23Steady, Laminar Flow in Circular Tubes
2.0K
Hagen-Poiseuille flow describes a viscous fluid's steady, incompressible flow through a cylindrical tube with a constant radius R. This flow profile is often applied to understand fluid transport in narrow channels, such as capillaries. It serves as a foundational example of laminar flow. In this model, cylindrical coordinates (r,θ,z) are used to describe the radial (r), angular (θ), and axial (z) dimensions within the tube. For Hagen-Poiseuille flow, the velocity profile is purely...
2.0K
01:24Turbulent Flow
964
Turbulent flow is characterized by unpredictable fluctuations in velocity and pressure, which result in a chaotic fluid movement distinct from the orderly patterns of laminar flow. While laminar flow is governed by smooth, parallel layers with minimal mixing, turbulent flow exhibits highly irregular, three-dimensional patterns. This behavior arises due to instabilities in the fluid's velocity profile, and amplifies as the flow velocity increases. Minor disturbances, known as turbulent...
964