Journal
JOURNAL OF HYDRAULIC RESEARCH
Volume 47, Issue 2, Pages 147-156Publisher
TAYLOR & FRANCIS LTD
DOI: 10.3826/jhr.2009.3157
Keywords
Open channel flow; pipe; pressurized flow; sewer; simulation; transient flow; unsteady flow
Categories
Funding
- Metropolitan Water Reclamation District of Greater Chicago
Ask authors/readers for more resources
A robust model for simulating the simultaneous occurrence of free surface and pressurized flows is presented using the Preissmann slot approach for modeling pressurized flows. This model is capable of simulating transient flows in closed conduits ranging from free surface flows, to partly free surface-partly pressurized flows (mixed flows), to fully pressurized flows. Its robustness for simulating mixed flows is accomplished by: (1) Introducing a gradual transition between the pipe and the slot, and (2) Using a second-order Godunov-type scheme with a slope limiter to solve the governing free surface flow equations. The accuracy and robustness of the modified Preissmann model is investigated using five test cases. The results show that the proposed model accurately describes complex flow features, such as negative open channel-pressurized flow interfaces and interface reversals. The results also show that the proposed model is able to produce stable results for strong (rapid) transients at field scale where no sub-atmospheric flows occur.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available