DocumentCode :
504651
Title :
3D transient analysis of ultrasonic propagation in flow field using finite difference time domain method
Author :
Muramatsu, Kazuhiro ; Kimoto, Akira ; Takahashi, Shinya
Author_Institution :
Dept. of Electr. & Electron. Eng., Saga Univ., Saga, Japan
fYear :
2009
fDate :
18-21 Aug. 2009
Firstpage :
3343
Lastpage :
3346
Abstract :
In this paper, the method of 3D transient analysis of the ultrasonic propagation in flow field is developed using the finite difference time domain method. In this method, in order to take account of flow field, the semi-Lagrange coordinate system, in which physical quantities are defined by the Euler coordinate system and the time derivative term is discretized by the Lagrange coordinate system, is applied. The developed method is applied to a simple model of flow meter for air, in which the flow fields are laminar and turbulent flows. To verify the developed method, the measurement is also carried out. The waveform of acoustic pressure on the surface of receiver obtained from the calculation is compared with the measured voltage waveform. The propagation times obtained from the calculation are in good agreement with those obtained from the experiment in various flow rates. However, the tendency of amplitude of waveform by flow rate in the calculation is different from that in the experiment at present.
Keywords :
acoustic intensity measurement; finite difference time-domain analysis; flowmeters; laminar flow; transient analysis; turbulence; ultrasonic propagation; 3D transient analysis; acoustic pressure waveform; finite difference time domain method; flow meter; flow rate; laminar flow field; receiver; semiLagrange coordinate system; turbulent flows; ultrasonic propagation; voltage waveform measurement; Acoustic measurements; Equations; Finite difference methods; Lagrangian functions; Pressure measurement; Surface acoustic waves; Time domain analysis; Transient analysis; Ultrasonic variables measurement; Voltage; Ultrasonic propagation; finite difference time domain method; flow meter; semi-Lagrange coordinate system;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
ICCAS-SICE, 2009
Conference_Location :
Fukuoka
Print_ISBN :
978-4-907764-34-0
Electronic_ISBN :
978-4-907764-33-3
Type :
conf
Filename :
5334326
Link To Document :
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