Diffrence between out flow and continuative boundray condition?

meri95124091 · December 9, 2020, 04:18

hello everyone

I have simulated a sloped channel which has connected culvert. the problem is I don't know whether its better to use continuative or outflow at the exit of the channel and what is the difference?

koful · January 10, 2021, 06:30

Hello.

There are not so much difference. Outflow bc gives better results with wave boundary conditions. I would try outflow first.

In either case, we do not specify anything about flow conditions outside the boundary. I recommend using the specified pressure if you know about the flow conditions outside the boundary. If you are determined to use these boundary conditions, make sure you place the boundary far enough.

December 9, 2020, 04:18	Diffrence between out flow and continuative boundray condition?	#1
meri95124091 New Member Join Date: Aug 2018 Posts: 5 Rep Power: 7	hello everyone I have simulated a sloped channel which has connected culvert. the problem is I don't know whether its better to use continuative or outflow at the exit of the channel and what is the difference? Last edited by meri95124091; December 9, 2020 at 15:29.

January 10, 2021, 06:30		#2
koful Member Join Date: Jun 2014 Location: Turkey Posts: 43 Rep Power: 11	Hello. There are not so much difference. Outflow bc gives better results with wave boundary conditions. I would try outflow first. In either case, we do not specify anything about flow conditions outside the boundary. I recommend using the specified pressure if you know about the flow conditions outside the boundary. If you are determined to use these boundary conditions, make sure you place the boundary far enough.