The influence of temperature on flow-induced forces on quartzcrystal-microbalance sensors in a Chinese liquor identification electronic-nose: three-dimensional computational fluid dynamics simulation and analysis

doi:10.1007/s10483-019-2512-9

Abstract

Abstract: An electronic-nose is developed based on eight quartz-crystal-microbalance (QCM) gas sensors in a sensor box, and is used to detect Chinese liquors at room temperature. Each sensor is a highly-accurate and highly-sensitive oscillator that has experienced airflow disturbances under the condition of varying room temperatures due to unstable flow-induced forces on the sensors surfaces. The three-dimensional (3D) nature of the airflow inside the sensor box and the interactions of the airflow on the sensors surfaces at different temperatures are studied by computational fluid dynamics (CFD) tools. Higher simulation accuracy is achieved by optimizing meshes, meshing the computational domain using a fine unstructural tetrahedron mesh. An optimum temperature, 30 ℃, is obtained by analyzing the distributions of velocity streamlines and the static pressure, as well as the flow-induced forces over time, all of which may be used to improve the identification accuracy of the electronic-nose for achieving stable and repeatable signals by removing the influence of temperature.

Key words: computational fluid dynamics (CFD), temperature, quartz-crystalmicrobalance (QCM) gas sensor, electronic nose, identification accuracy

2010 MSC Number:

Qiang LI, Yu GU, Huatao WANG. The influence of temperature on flow-induced forces on quartzcrystal-microbalance sensors in a Chinese liquor identification electronic-nose: three-dimensional computational fluid dynamics simulation and analysis. Applied Mathematics and Mechanics (English Edition), 2019, 40(9): 1301-1312.

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