선택한 단어 수는 입니다.
최소 단어 이상 선택하여야 합니다.
최소 단어 이상 선택하여야 합니다.
선택한 단어 수는 30입니다.
최대 10 단어까지만 선택 가능합니다.
최대 10 단어까지만 선택 가능합니다.
제안 방법
- Numerical analysis was performed to investigate the performance of the virtual impactor with and without electro-aerodynamic lens. The electro-aerodynamic lens, proposed in this study, was equipped with three electrodes, i.e. two grounded electrodes and one high-voltage central electrode, across which electric voltage was applied for creating electric field within the lens. The performance of virtual impactor was determined by using the electro-aerodynamic lens before the virtual impactor.
- The fluid flow simulation was performed by using a computational fluid dynamics (CFD) code, ANSYS FLUENT Release16.1, and a fluid magneto-hydrodynamic (MHD) module was utilized for incorporating the effect of electric potential along with fluid flow. Grid independence test was conducted for the geometries of virtual impactor and electro-aerodynamic lens to determine the optimum number of computational cells for the analysis.
- However, we believe that virtual impactor performance can be further improved by making it capable of sampling submicron particles under normal pressure condition and by increasing the sampling accuracy through elimination of fine particle contamination in the minor flow. Therefore, in this study, we propose an electro-aerodynamic lens which uses the combined aerodynamic and electrostatic effects for collimating the incoming aerosol particles into a thin particle-beam. The electro-aerodynamic lens is connected to the inlet of virtual impactor, so that the collimated beam of aerosol particles can be supplied to the virtual impactor for sampling.
대상 데이터
- [11]. The virtual impactor consisted of two nozzles, that is, acceleration nozzle and collection nozzle. The width of the acceleration nozzle was 1 mm, and that of the collection nozzle was 1.
이론/모형
- 3 kPa were assumed for numerical analysis. A SIMPLE algorithm was used to couple velocity and pressure for solving energy, continuity, momentum, and electric potential equations. The convergence criteria were kept at 10–6.
- Similarly, the boundary conditions considered for the MHD analysis of electro-aerodynamic lens were conductive at the electrode and insulation at all walls. Discrete phase model (DPM), provided in the FLUENT code, was used for calculating the trajectories of particles within the virtual impactor and the electro-aerodynamic lens. The DPM was based on Lagrangian reference frame.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.