Laminar flow characterization using low-field magnetic resonance techniques

Laminar flow velocity profiles depend heavily on fluid rheology. Developing methods of laminar characterization, based low-field magnetic resonance (MR), contribute to the widespread industrial application MR technique in In this paper, we outline design a low-cost, palm-sized permanent magnet with 1H frequency 20.48 MHz measure flow. The consists two disk magnets, which were each tilted at an angle 1° from edge separation 1.4 cm generate constant gradient, 65 G/cm, direction Subsequently, series process methods, for measurements, proposed characterize Newtonian and non-Newtonian flows pipe, including phase-based method, magnitude-based spectrum method. accuracy was validated by simulations, experiments Poiseuille shear-thinning designed magnet. new profile are advantageous because hardware measurement simple will result portable instrument. Although governing equations complicated, data analysis is straightforward.