Title: Doppler ultrasound flow measurement of non-parallel velocity fields in a deformed elastic tube

Authors: Bipro N. Dubey; S. Nahar; Erich J. Windhab

Addresses: Department of Engineering and Mathematics, College of Business, Technology and Engineering, Sheffield Hallam University, Howard Street, Sheffield, S1 1WB, UK ' Department of Engineering and Mathematics, College of Business, Technology and Engineering, Sheffield Hallam University, Howard Street, Sheffield, S1 1WB, UK ' Laboratory of Food Process Engineering, Institute of Food, Nutrition and Health, ETH Zurich, Schmelzbergstrasse 9, 8092 Zurich, Switzerland

Abstract: The ultrasonic Doppler velocimetry (UVP) method is well known for the laminar flow stream in a circular tube. In many practical situations, deformed tubes or, non-parallel streamlines are involved. An improved experimental arrangement of the UVP transducer is needed to define the real velocity-vectors of the flow when the streamlines are not parallel to its wall. An experimental approach has been used with two sets of transducers in perpendicular to each other to obtain the magnitude of the real velocity vector (v_real), the direction of velocity-vector, and axial velocity component along the flow direction. The experiments were carried out using a proposed arrangement of UVP transducer for flow visualisation in a squeezed elastic tube. The results show that the 2D velocity profiling found to be more accurate using the present transducer arrangement, which is important for generating further information such as shear rate, flow rate, etc.

Keywords: ultrasound Doppler velocimetry; contraction flow geometry; non-parallel flow; velocity vector; elastic tube.

DOI: 10.1504/IJHM.2020.112174

International Journal of Hydromechatronics, 2020 Vol.3 No.4, pp.368 - 384

Received: 05 Jun 2020
Accepted: 11 Jun 2020
Published online: 04 Jan 2021 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article