Generalized Newtonian flow analysis in the microchannel manufactured by SLA considering nano-scale stair effect

SLA (stereolithography), as a rapid and accurate additive manufacturing method, can be used to mold the microchannel. The stair effect is inevitable when the part is printed layer by layer, which has an important influence on the printing performance. In the current work, the power-law flow in the microchannel with nano-scale stairs manufactured by SLA is simulated and investigated. To improve the stability caused by the non-Newtonian behavior, a modified lattice Boltzmann method (LBM) is proposed and validated. Then, a series of simulations are conducted and analyzed, the results show that both the stair effect and power-law index are important factors. The stairs on the surface force the streamlines to be curved and increase the outlet velocity. In addition, different power-law indexes result in completely different flows. The small power-law index leads to a much larger velocity than other cases, while the large power-law index makes the outlet velocity unstable at the middle position.

Formulation of PLGA Nano-carrier: Specialized modification for cancer therapeutic applications

The eminence of nano-scale materials prevailed after the invention of high-resolution microscopes. Nowadays, nanoparticles are predominantly found in every application, including biomedical applications. In nanomedicine, the unique properties make nano-scale...

Nano-scale Insights Regarding Coke Formation in Zeolite SSZ-13 Subject to the Methanol-to-Hydrocarbons Reaction

The methanol-to-hydrocarbons (MTH) process, commonly catalyzed by zeolites, is of great commercial interest and therefore widely studied both in industry and academia. However, zeolite-based catalyst materials are notoriously hard to...

Synthesis, Crystal Structure and Reversible Solid-State Crystal-to-Crystal Transformation of Three Isostructural Lead(II) Halide Coordination Polymers with different luminescence properties in bulk and nano scale

Novel three dimensional (3D) isostructural lead(II) halide coordination polymers [Pb(INO)X]n X= Cl (1) , Br (2), I (3); INO = isonicotinic acid n-oxide] have been synthesized via branched-tube method. The...

Effect of Nano-Sized Energetic Materials (nEMs) on the Performance of Solid Propellants: A Review

As a hot research topic, nano-scale energetic materials have recently attracted much attention in the fields of propellants and explosives. The preparation of different types of nano-sized energetic materials were carried out, and the effects of nano-sized energetic materials (nEMs) on the properties of solid propellants and explosives were investigated and compared with those of micro-sized ones, placing emphasis on the investigation of the hazardous properties, which could be useable for solid rocket nozzle motor applications. It was found that the nano-sized energetic materials can decrease the impact sensitivity and friction sensitivity of solid propellants and explosives compared with the corresponding micro-sized ones, and the mechanical sensitivities are lower than that of micro-sized particles formulation. Seventy-nine references were enclosed.