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Showing results for tags 'flow constriction'.
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Hi All, Module 6 of the TUFLOW tutorial is now available. This module introduces a large bridge structure that spans the creek and part of the floodplain. The model includes both a a 1D bridge channel and 2D flow constriction layer to represent the bridge. The TUFLOW tutorial can be found here: http://wiki.tuflow.com/index.php?title=Tutorial_Module06 The required module data and completed models are available on our TUFLOW downloads section: http://www.tuflow.co...ial Models.aspx If you have any questions, clarifications or feedback, please email email@example.com. Regards Phillip
I've seen a few posts on the Mass Balance Corrector and even see this listed in the SMS Help menu in SMS 11.0, but it doesn't appear to be an option under the 2D model parameters "Misc" folder as advertised. Is this located somewhere else in the program? I'm using SMS 11.0 (Build Date November 5, 2012.) I am modeling a creek that appears to go supercritical when flow is contracted through the existing bridge opening. The results are reasonable, match the local flood record, the model has no negative depths, and my cumulative mass error is 0.1%; however, there are localized areas with mass balance errors between -20% and 20% generally in these areas of supercritical flow (as depicted in the MB1 solution mesh). While localized, these areas are in close proximity to the subject crossing. This range was improved slightly through lowering my time step. I'm working with a 15-foot grid and lowered the timestep from 1 second to 0.5 seconds. I am running the program using double precision. I viewed this using the MB1 output of the solution mesh, which is output I don't typically focus on. Nothing shows up in the TUFLOW messages related to the mass balance. I imported this output while investigating some high velocity flow at the entrance of the crossing. Are mass balance errors common with supercritical flow? Is there a way to resolve these without the Mass Balance Corrector? Thanks, Chuck