个人信息Personal Information
教授
博士生导师
硕士生导师
性别:男
毕业院校:威尔大学
学位:博士
所在单位:机械工程学院
学科:微机电工程
办公地点:机械工程学院2号楼214-2
联系方式:办公电话:0411-84709754
电子邮箱:zouhl@dlut.edu.cn
Numerical simulation of Monte Carlo ion transport at atmospheric pressure within improved air amplifier geometry
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论文类型:期刊论文
发表时间:2014-01-01
发表刊物:International Journal for Ion Mobility Spectrometry
收录刊物:EI
卷号:17
期号:3-4
页面范围:157-166
ISSN号:14356163
摘要:A computational fluid dynamics (CFD) software package ANSYS Fluent was employed for simulation of ion transport at atmospheric pressure between a nano-electrospray ionization (nano-ESI) emitter and the mass spectrometer (MS) sampling inlet tube inside an improved air amplifier device incorporating a radiofrequency ion funnel. The flow field, electric field and the ion trajectory calculations were carried out in separate steps. Parallelized user-defined functions were written to accommodate the additional static and transient electric fields and the elastic ion-gas collisions with the Monte Carlo hard-sphere simulation abilities within Fluent’s environment. The ion transmission efficiency from a nano-ESI emitter to the MS sampling inlet was evaluated for different air amplifier and ion funnel operating conditions by tracking 250 sample reserpine ions. Results show that the high velocity gas stream and the external electric field cause a rapid acceleration of the ion beam and its dispersion along the centreline of the air amplifier which leads to reduction of the space-charge effect and the beam divergence. The radiofrequency potential applied to the ion funnel contributed to additional ion focusing. © 2014, Springer-Verlag Berlin Heidelberg.