Abstract
The contribution of each part of the flow to a meter signal is expressed in terms of a weight vector <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">W</tex> and the velocity ν, with the signal <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\propto \int \nu \cdot W dr</tex> over the flowmeter volume. <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">W</tex> depends on the magnetic field <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">B</tex> and a vector defined entirely by the electrode and flowmeter geometry. A meter is called "ideal" if the signal is proportional to the flow rate and independent of the flow pattern. The condition on <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">W</tex> for this is given and an experimental ideal meter mentioned. Since meters with small (point) electrodes cannot be ideal, weaker conditions on <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">W</tex> for flows of different types are reviewed. A technique for designing short meters suitable for rectilinear flow with an unknown axisymmetric velocity profile is briefly described. The behavior of different shapes of electrodes, including electrodes of finite and variable conductivity, is discussed. Finally the problems of pulsating flow, magnetic field specification, and nonuniform and anisotropic blood conductivity are discussed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
