Experiment time and simulation time

Andrex · March 12, 2023, 05:34

Hello Team REEF3D and all members

After I did my scour experiment around Piers due to the current (running time =3600s). I am to trying to simulate my experiment using REEF3D, and I am confused about setting up a time simulation to fit with the experiment.

From the Tutorial, I see more options to set up time such as N 41, S 13, S 15, S 19, S 43, S 45, S 46...

Please clarify some options that you think are essential for my simulation.

In my opinion, I use N 41 3600 (is it correct?)

Many thank

Andrex

valgrinda · March 13, 2023, 13:02

Hi Andrex,

typically, time scales for sediment and flow calculations are decoupled. The time steps for the flow are much smaller than for the sediment computations. So then for sediment calculations S 19 is the deciding number. N 41 or N 45 can also limit the simulation, but best to only use S 19 for those cases where you want to model a given erosion duration.

Andrex · March 14, 2023, 01:17

Hello Prof. Hans Bihs

Thank you for your response.

Best Regards

Andrex

March 12, 2023, 05:34	Experiment time and simulation time	#1
Andrex New Member Andrex Join Date: Mar 2023 Posts: 7 Rep Power: 3	Hello Team REEF3D and all members After I did my scour experiment around Piers due to the current (running time =3600s). I am to trying to simulate my experiment using REEF3D, and I am confused about setting up a time simulation to fit with the experiment. From the Tutorial, I see more options to set up time such as N 41, S 13, S 15, S 19, S 43, S 45, S 46... Please clarify some options that you think are essential for my simulation. In my opinion, I use N 41 3600 (is it correct?) Many thank Andrex

March 13, 2023, 13:02		#2
valgrinda Super Moderator Hans Bihs Join Date: Jun 2009 Location: Trondheim, Norway Posts: 403 Rep Power: 19	Hi Andrex, typically, time scales for sediment and flow calculations are decoupled. The time steps for the flow are much smaller than for the sediment computations. So then for sediment calculations S 19 is the deciding number. N 41 or N 45 can also limit the simulation, but best to only use S 19 for those cases where you want to model a given erosion duration. NTNHAN and Andrex like this. __________________ Hans Bihs Team REEF3D www.reef3d.com

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March 14, 2023, 01:17		#3
Andrex New Member Andrex Join Date: Mar 2023 Posts: 7 Rep Power: 3	Hello Prof. Hans Bihs Thank you for your response. Best Regards Andrex