Sensitivity studies involving filter functions in the tomographic reconstruction of two-phase flow density distributions
Conference
·
· Transactions of the American Nuclear Society; (USA)
OSTI ID:5551755
The tomographic reconstruction of the density distribution in two-phase flows has been reported by Rathore et al. Those methods were designed for radially symmetric flow situations. For general nonsymmetric density distributions, the backprojection algorithms in medical imaging can be successfully applied after suitable filtering of the projection data. The results reported by Munshi et al. involve a sensitivity study of various filters used in the tomographic reconstruction of two-phase air/water flow. In that study the cross-sectionally averaged values were compared extensively for two different algorithms incorporating several types of filters. The present work involves a sensitivity study of the point-density values reconstructed by the popular filtered-backprojection method summarized by Lewitt. The test are carried out on some assumed distributions of the absorption coefficient {mu}, which is related to the density {rho} in a calibrated sense. The test functions represent bubbly and annular flows. After the initial testing, the air/water flow data were processed to obtain density maps (using appropriate calibration of p versus {mu}) for various cases of cross-sectionally averaged density <{rho}>. The reconstructed average density <{rho}>{sub CT} it comparable to the earlier method.
- OSTI ID:
- 5551755
- Report Number(s):
- CONF-880601--
- Conference Information:
- Journal Name: Transactions of the American Nuclear Society; (USA) Journal Volume: 56
- Country of Publication:
- United States
- Language:
- English
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