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

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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 °C, 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.

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Abbreviations

t :

time, s

x :

x-th component of coordinate vector, m

y :

y-th component of coordinate vector, m

z :

z-th component of coordinate vector, m

u :

x-th component of velocity, m/s

v :

y-th component of velocity, m/s

w :

z-th component of velocity, m/s

k :

heat conductivity constant, W·m−1·K−1

p :

pressure, Pa

c p :

constant pressure specific heat, kJ/(kg-K)

T :

temperature, °C

D :

mass diffusivity, m2/s.

ρ :

density, kg/m3

λ :

thermal conductivity

Φ:

source term

μ :

dynamic viscosity, N·s/m2

γ :

time derivative

eff:

effective

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Correspondence to Yu Gu.

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Citation: LI, Q., GU, Y., and WANG, H. T. The influence of temperature on flow-induced forces on quartz-crystal-microbalance sensors in a Chinese liquor identification electronic-nose: three-dimensional computational fluid dynamics simulation and analysis. Applied Mathematics and Mechanics (English Edition), 40(9), 1301–1312 (2019) https://doi.org/10.1007/s10483-019-2512-9

Project supported by the National Natural Science Foundation of China (Nos. 61876059 and U1501251)

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Li, Q., Gu, Y. & Wang, H. The influence of temperature on flow-induced forces on quartz-crystal-microbalance sensors in a Chinese liquor identification electronic-nose: three-dimensional computational fluid dynamics simulation and analysis. Appl. Math. Mech.-Engl. Ed. 40, 1301–1312 (2019). https://doi.org/10.1007/s10483-019-2512-9

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  • DOI: https://doi.org/10.1007/s10483-019-2512-9

Key words

Chinese Library Classification

2010 Mathematics Subject Classification

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