This subproject is one of many research subprojects utilizing theresources provided by a Center grant funded by NIH/NCRR. The subproject andinvestigator (PI) may have received primary funding from another NIH source,and thus could be represented in other CRISP entries. The institution listed isfor the Center, which is not necessarily the institution for the investigator.Fluid flow plays a major role in the function of modern technical devices as well as in the development of the natural world and its inhabitants. Most technological and natural flows are three-dimensional, turbulent and highly complex making them nearly impossible to predict with computations, but the complexity is such that knowing the full mean velocity fields would contribute significantly to our understanding. Moreover, measurements of turbulent velocity fluctuations would enhance greatly our insight into these flows. Even the most advanced conventional laser-based measurement techniques are either too time-consuming or too expensive or simply incapable of measuring the entire flow fields for many real flows. Magnetic resonance velocimetry (MRV) presents a promising experimental alternative for use in these flows. MRV is a non-invasive technique for measuring the full three-component mean velocity field and potentially the turbulent velocity fluctuations for complex flows in and around opaque objects. MRV uses magnetic resonance imaging (MRI) techniques in conventional medical scanners. While MRV was developed for measuring blood flow in patients, we are adapting it to measure velocities in turbulent flows.
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