During water droplet impingement onto a rice-leaf-inspired grooved superhydrophobic surface, the unidirectional textures can reduce the solid-liquid contact time through modifying the droplet impact dynamics. The influence of the groove geometry on the splashing of impacting droplets is still unrevealed. In this study, we experimentally identify the droplet bouncing and splashing regimes on grooved superhydrophobic surfaces of varying parameters. Asymmetric spreading and retracting of droplets are observed on the surfaces, accompanied with obvious liquid jets generated within the grooves. As the impact velocity increases, secondary droplets are ejected from the rim of the liquid jets, which is the onset of droplet splashing on the grooved superhydrophobic surfaces. We find that the critical Weber number for the splash of liquid jets decreases with the groove width but increase with the droplet diameter. Scaling analysis is performed to model the splashing criteria and explain its dependence on groove parameters and droplet properties. This research advances the understanding of droplet splashing dynamics on textured superhydrophobic surfaces, which is promising for some agricultural and industrial applications.
Regulating the impact dynamics of water droplets on a solid surface is of great significance for some practical applications. In this study, the droplet impingement on a flexible superhydrophobic surface arrayed with micro-scale grooves is investigated experimentally. The surface was curved into cylindrical shapes with certain curvatures from two orthogonal directions, where axial and circumferential grooves were formed, respectively. The effects of curvature diameter and Weber number, as well as the orientation of grooves on droplet spreading and retracting dynamics were discussed and explained. Results show that the circumferential grooves promote the spreading of droplet in the azimuthal direction, where the droplet rebounds from the surface with a stretched shape. This mechanism further reduces the contact time of impacting droplets on the superhydrophobic surface compared to the other curving mode.
Panorama technology can build real virtual reality technology for users on the computer based on panoramic images. Panoramic technology can bring users an all-round interactive view of the restored display of the real scene. Panoramic technology can help the red station to promote, let people know more about the red station, and improve the service quality of the red station. This article introduces the application of panoramic technology in the design of red station, and deeply analyzes the panoramic scene to introduce the way the system integrates panoramic technology, so that users can observe the red station through a 360-degree panoramic view through smart devices.
With the continuous development of Internet technology in China, the teaching level of higher vocational colleges in China is also constantly improving, and gradually becoming one of the very important topics in higher vocational colleges. China has gradually entered the information age, and more and more higher vocational colleges have begun to establish their own LAN teaching system. In the process of the rapid development of teaching, it is necessary to further strengthen the connection between the digital teaching system and the teaching work in higher vocational colleges, promote its integration with the Internet, provide more convenient ways for students, and play its complete role. This paper discusses the design and development of Chinese teaching system in the Internet era, aiming to increase the development and design of Chinese digital teaching resource system in higher vocational colleges, so as to accelerate the process of Chinese teaching in higher vocational colleges in China.
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