Based on previous experiments for U‐ and Z‐type manifolds, numerical models were established; then, investigations were conducted on the effect of the optimized designs on the flow distribution. An increaser and baffle plates were attached to the distribution header for the U‐ and Z‐type manifolds, respectively, considering various configurations and sizes. The results indicate that an increaser could markedly reduce the non‐uniformity with a simultaneous decrease of the pressure drop, and baffle plates could also drastically improve the flow distribution, but at the cost of a slight pressure drop increase. By comprehensively applying an increaser and baffle plates in the Z‐type manifold, this adverse effect could be eliminated.
Plateau-Rayleigh instability describes the infinite falling stream of fluid breaks into smaller droplets. With the development of nanotechnology, more and more attention is being drawn to Plateau-Rayleigh instability. This surface tension-driven instability performs well in the preparation of the nanoparticles, especially in photonics applications, such as optical micro-resonators in nano-biosensing systems. In this article, we mainly adopt the thermal fluid coupling method. The effect of temperature field on instability is studied with the aid of numerical simulation. In addition, the radius of the inner fluid column, the thickness of the outer fluid, and the temperature gradient are also studied to explore how the factors influence the Plateau-Rayleigh instability. The wavelength of the instability is characterized by droplet diameter, which is formed through the process caused by Plateau-Rayleigh instability.
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