Dam break analysis – water overtops / floods down stream in spurts - Kleinschmidt

This topic has 5 replies, 221 voices, and was last updated 6 years, 10 months ago by traggatmot.

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July 25, 2018 at 11:08 pm #6977

traggatmot
Participant

Anyone have any ideas what model settings or setup I should be looking at to determine why my dam break results in spurting flood waves?

July 27, 2018 at 5:35 am #11558

cameron
Participant

Probably your time step is way too high.

August 9, 2018 at 11:06 pm #11559

traggatmot
Participant

Anyone else have any suggestions?

August 10, 2018 at 4:36 pm #11560

traggatmot
Participant

I see this behavior with 15 second calculation time steps and 1 minute outputs.

August 10, 2018 at 5:39 pm #11561

cameron
Participant

are you using full momentum or diffusion wave solver?

August 10, 2018 at 7:25 pm #11562

Anonymous
Guest

Spurting waves is either a representative of software limitations or instabilities. The limitations of slope will always represent graphically waves going down a high steeping slope. The only way to fix this is to use different variations in cell orientation. Mapping output interval can also do this.

If this is a full 2D breach im almost certain it is due to either one of those shown above. If your mass balance is within an appropriate percent error than youre fine
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