In:
Journal of Computational Acoustics, World Scientific Pub Co Pte Ltd, Vol. 25, No. 04 ( 2017-12), p. 1750005-
Abstract:
A numerical model for a clamp-on transit-time ultrasonic flowmeter (TTUF) under multi-phase flow conditions is presented. The method solves equations of linear elasticity for isotropic heterogeneous materials with background flow where acoustic media are modeled by setting shear modulus to zero. Spatial derivatives are calculated by a Fourier collocation method allowing the use of the fast Fourier transform (FFT) and time derivatives are approximated by a finite difference (FD) scheme. This approach is sometimes referred to as a pseudospectral time-domain method. Perfectly matched layers (PML) are used to avoid wave-wrapping and staggered grids are implemented to improve stability and efficiency. The method is verified against exact analytical solutions and the effect of the time-staggering and associated lowest number of points per minimum wavelengths value is discussed. The method is then employed to model a complete TTUF measurement setup to simulate the effect of a flow profile on the flowmeter accuracy and a study of an impact of inclusions in flowing media on received signals is carried out.
Type of Medium:
Online Resource
ISSN:
0218-396X
,
1793-6489
DOI:
10.1142/S0218396X17500059
Language:
English
Publisher:
World Scientific Pub Co Pte Ltd
Publication Date:
2017
detail.hit.zdb_id:
1151612-4
detail.hit.zdb_id:
2048865-8
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