Controller Block

michaelZ · 2018-05-29 20:41:30

Hello,

I try to model a dam breach. My inflow type is a "z_hydrograph" and should keep a constant water surface elevation to model the pool. It is essential that the water surface elevation at the dam remains constant at the desired value. But as the dam breaches, the water elevation is sinking to a lower level, the z_hydrograph does not provide the constant height.

So, I thought of the CONTROLLER Block to trigger the inflow boundary to provide the constant level of water upstream the dam during the whole breach prozess. I had a few attempts but I could not figure out a way.

My question is: Is this even possible? What is the common way to use the CONTROLLER Block for such issues? Or does it take other/additional steps to achieve the constant elevation?

Thanks

Sam · 2018-05-29 20:46:40

Where is your inflow boundary condition defined?

I guess that you include the reservoir in your computational domain as well?

michaelZ · 2018-05-30 08:35:09

Yes I include the reservoir in the computation. The dam is very small because it models a laboratory test. The dam is 0,3m high and the width is 2m. My inflow boundary is around 4m away from the heel of the dam.

Sam · 2018-05-30 08:48:36

This sounds like the perfect application for a PID controller.

Please have a close look to the Manual how to set it up.

User Forum of Software BASEMENT

#1 2018-05-29 20:41:30

Controller Block

#2 2018-05-29 20:46:40

Re: Controller Block

#3 2018-05-30 08:35:09

Re: Controller Block

#4 2018-05-30 08:48:36

Re: Controller Block

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