中国物理B ›› 2022, Vol. 31 ›› Issue (1): 10701-010701.doi: 10.1088/1674-1056/ac0902

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Effect of staggered array structure on the flow field of micro gas chromatographic column

Daohan Ge(葛道晗)1, Zhou Hu(胡州)1, Liqiang Zhang(张立强)1,†, and Shining Zhu(祝世宁)2   

  1. 1 Institute of Intelligent Flexible Mechatronics, Jiangsu University, Zhenjiang 212013, China;
    2 National Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, China
  • 收稿日期:2021-03-09 修回日期:2021-06-04 接受日期:2021-06-08 出版日期:2021-12-03 发布日期:2021-12-28
  • 通讯作者: Liqiang Zhang E-mail:zhanglq4158@ujs.edu.cn
  • 基金资助:
    Project supported by the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20180098), National Laboratory of Solid State Microstructures, Nanjing University (Grant Nos. M32045 and M33042).

Effect of staggered array structure on the flow field of micro gas chromatographic column

Daohan Ge(葛道晗)1, Zhou Hu(胡州)1, Liqiang Zhang(张立强)1,†, and Shining Zhu(祝世宁)2   

  1. 1 Institute of Intelligent Flexible Mechatronics, Jiangsu University, Zhenjiang 212013, China;
    2 National Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, China
  • Received:2021-03-09 Revised:2021-06-04 Accepted:2021-06-08 Online:2021-12-03 Published:2021-12-28
  • Contact: Liqiang Zhang E-mail:zhanglq4158@ujs.edu.cn
  • Supported by:
    Project supported by the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20180098), National Laboratory of Solid State Microstructures, Nanjing University (Grant Nos. M32045 and M33042).

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摘要： A new design of staggered array semi-packed micro gas chromatographic column was presented based on the micro electromechanical system (MEMS) technology. It was a sensor for gas sample analysis. The internal velocity fields of ten types of semi-packed micro gas chromatographic column were studied. The effects of array spacing and dislocation spacing on the flow field distribution were investigated. The results show that on the basis of ensuring the formation of virtual wall, with the increase of array spacing, the maximum velocity difference between the flow channels in the vertical direction decreases gradually, but the velocity difference in the flow channels a and b increases. When the inlet velocity was set to be 0.18 m/s, the maximum velocity difference in the channel of the staggered semi-packed micro gas chromatography column 3 (CSAC3) was 0.05610 m/s. The maximum velocity difference in the channel a was 0.09160 m/s. The maximum velocity difference in the channel b was 0.02401 m/s. CSAC3 had a more uniform velocity field distribution, which can effectively suppress the laminar flow effect during chromatographic separation, and had a smaller pressure distribution, which puts forward lower requirements for carrier gas system. The staggered array semi-packed micro gas chromatography column proposed in this paper can effectively improve the velocity field distribution and pressure distribution in the channel, and provide a theoretical basis for the design of the new micro gas chromatography column structure.

关键词: micro electromechanical system (MEMS), micro gas chromatography

Abstract: A new design of staggered array semi-packed micro gas chromatographic column was presented based on the micro electromechanical system (MEMS) technology. It was a sensor for gas sample analysis. The internal velocity fields of ten types of semi-packed micro gas chromatographic column were studied. The effects of array spacing and dislocation spacing on the flow field distribution were investigated. The results show that on the basis of ensuring the formation of virtual wall, with the increase of array spacing, the maximum velocity difference between the flow channels in the vertical direction decreases gradually, but the velocity difference in the flow channels a and b increases. When the inlet velocity was set to be 0.18 m/s, the maximum velocity difference in the channel of the staggered semi-packed micro gas chromatography column 3 (CSAC3) was 0.05610 m/s. The maximum velocity difference in the channel a was 0.09160 m/s. The maximum velocity difference in the channel b was 0.02401 m/s. CSAC3 had a more uniform velocity field distribution, which can effectively suppress the laminar flow effect during chromatographic separation, and had a smaller pressure distribution, which puts forward lower requirements for carrier gas system. The staggered array semi-packed micro gas chromatography column proposed in this paper can effectively improve the velocity field distribution and pressure distribution in the channel, and provide a theoretical basis for the design of the new micro gas chromatography column structure.

Key words: micro electromechanical system (MEMS), micro gas chromatography

中图分类号:  (Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)

  • 07.07.Df
85.85.+j (Micro- and nano-electromechanical systems (MEMS/NEMS) and devices) 47.61.Fg (Flows in micro-electromechanical systems (MEMS) and nano-electromechanical systems (NEMS)) 47.63.Jd (Microcirculation and flow through tissues)