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Citation: GAO Fang-Yuan, ZHANG Qing-He, HUANG Zhao-Liang, WANG Bo-Liang, ZHANG Wei-Bing. Numerical Simulation of Fluid Distribution in Closed Electrospray Ion Source[J]. Chinese Journal of Analytical Chemistry, ;2016, 44(11): 1707-1714. doi: 10.11895/j.issn.0253-3820.160323 shu

Numerical Simulation of Fluid Distribution in Closed Electrospray Ion Source

1.
Shanghai Key Laboratory of Functional Materials Chemtry, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China;
2.
China School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;
3.
National Institute of Metrology, Beijing 100029, China

Received Date: 23 April 2016
Revised Date: 20 July 2016

Fund Project: This work was supported by the National Natural Science Foundation of China (No.21235005) and the National Major Dcientific Instruments and Rquipments Dpecial project (No.2012YQ120044)

Two-dimensional axisymmetric simulations of electrospray ion source were built by Fluent software. The gas flow distribution was evaluated under comparable conditions, including configurations of ion source, ways to pump auxiliary gas and gas flow rates. The simulation results suggested that, rectangular ion source produced more stable flow distribution than other ion sources. Despite liquid flow was focused by both coaxial gas and orthogonal gas, the two pump ways had different effects on gas flow distribution. With the flow rate of coaxial gas increasing, backmixing region near the nozzle was enlarged and the stagnation point was changed, while the size of backmixing region was almost invariably with flow rate of orthogonal gas. The experimental validation was performed using Turbo V. The influences of spray needle position and gas flow rate on the detection of total ion current (TIC) were investigated. The experimental results agreed well with numerical simulation results.
- Electrospray ion source,
- Gas flow distribution,
- Fluent simulation soltware
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