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Three-dimensional magnetic resonance velocimetry measurements of turbulence quantities in complex flow |
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| Authors: | Christopher J Elkins Marcus T Alley Lars Saetran John K Eaton |
| Institution: | (1) Mechanical Engineering Department, Stanford University, Bldg. 500, Stanford, CA 94305, USA;(2) Department of Radiology, Lucas MRI/S Center, Stanford University, Stanford, CA 94305, USA;(3) Department of Energy and Process Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway |
| Abstract: | A magnetic resonance velocimetry (MRV) experimental technique based on magnetic resonance imaging and capable of measuring the turbulent Reynolds stresses in a 3D flow domain is described. Results are presented in backward facing step flow in a square channel with a Reynolds number of 48,000 based on step height and freestream velocity at the step. MRV results are compared to particle image velocimetry (PIV) measurements in the centerplane containing the streamwise and cross-stream axes. MRV and PIV mean velocity measurements show excellent agreement. MRV measurements for Reynolds normal stresses compare to within ±20% of the PIV results while results for the turbulent shear are less accurate. |
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