Tomographic reconstruction of stratified fluid flow
- 1 January 1993
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
- Vol. 40 (1), 26-33
- https://doi.org/10.1109/58.184995
Abstract
A method for imaging a moving fluid is proposed and evaluated by numerical simulation. A cross-section of a three-dimensional fluid is probed by high-frequency acoustic waves from several different directions. Assuming straight-ray geometric acoustics, the time of flight depends on both the scaler sound speed and the vector fluid velocity. By appropriately combining travel times, projections of both the sound speed and the velocity are isolated. The sound speed is reconstructed using the standard filtered backprojection algorithm. Though complete inversion of velocity is not possible, sufficient information is available to recover the component of fluid vorticity transverse to the plane of insonification. A new filtered backprojection algorithm for vorticity is developed and implemented. To demonstrate the inversion procedure, a 3-D stratified fluid is simulated and travel time data are calculated by path integration. These data are then inverted to recover both the scaler sound speed and the vorticity of the evolving flow.<>Keywords
This publication has 9 references indexed in Scilit:
- Reconstruction of oceanic microstructure by tomography: A numerical feasibility studyJournal of Geophysical Research, 1991
- Computation of 3-D velocity fields from 3-D cine CT images of a human heartIEEE Transactions on Medical Imaging, 1991
- Tomographic reconstruction of vector fieldsIEEE Transactions on Signal Processing, 1991
- A Review of Ocean Acoustic Tomography: 1987–1990Reviews of Geophysics, 1991
- A filtered backprojection method for the tomographic reconstruction of fluid vorticityInverse Problems, 1990
- Ocean acoustic tomography: Mesoscale velocityJournal of Geophysical Research: Oceans, 1987
- High speed optical tomography for flow visualizationApplied Optics, 1985
- Dynamics of vorticityJournal of Fluid Mechanics, 1981
- Reconstructing Three-Dimensional Fluid Velocity Vector Fields from Acoustic Transmission MeasurementsPublished by Springer Nature ,1977