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Modified Fickian Model for Predicting Dispersion
The ordinary Fickian model for longitudinal dispersion is modified by using a time or distance dependent dispersion coefficient with a time-scale much greater than the Fischer time scale. From the three bulk flow properties U*, A, and d¯, the asymptotic dispersion coefficient DL and the peak concentration Cmax in natural streams can be predicted within a factor of 2.5 and 1.6, respectively. The model is useful for the prediction of longitudinal spread of pollutants in rivers over both short and long distances.
Modified Fickian Model for Predicting Dispersion
The ordinary Fickian model for longitudinal dispersion is modified by using a time or distance dependent dispersion coefficient with a time-scale much greater than the Fischer time scale. From the three bulk flow properties U*, A, and d¯, the asymptotic dispersion coefficient DL and the peak concentration Cmax in natural streams can be predicted within a factor of 2.5 and 1.6, respectively. The model is useful for the prediction of longitudinal spread of pollutants in rivers over both short and long distances.
Modified Fickian Model for Predicting Dispersion
Liu, Henry (author) / Cheng, Alexander H. D. (author)
Journal of the Hydraulics Division ; 106 ; 1021-1040
2021-01-01
201980-01-01 pages
Article (Journal)
Electronic Resource
Unknown
2-D Non-Fickian Dispersion Model for the Initial Period of River Mixing
| HENRY – Federal Waterways Engineering and Research Institute (BAW) | 2016