time step

Andrea-wwwwwwww · April 25, 2021, 09:39

Can I set a fixed time step in reef3d?

kamath · April 26, 2021, 05:04

Hi Wenyu,
Yes, you can easily switch to a fixed time stepping approach in your simulations using
N 48 0 (to turn of adaptive time stepping)
N 49 <123> (uses the defined time step. replace <123> with desired time step.)

Information available on pp 50 of the REEF3D User Guide

Hope that cleared your issue

Andrea-wwwwwwww · April 28, 2021, 21:00

Hello, Mr. kamath, can I set a time step in one time period and a different time step in another time period? For example, 0-20s is set to 0.1s, 20s-30s is set to 0.05s

kamath · April 29, 2021, 02:50

No, this is currently not possible

Andrea-wwwwwwww · April 29, 2021, 04:59

1.Can the structure be set as elastomer and the water as compressible in reef3d?
2.How to continue the operation after pause?

valgrinda · April 30, 2021, 12:05

Flexible structures are currently not part of the code. Fully compressible flow is not supported.

April 25, 2021, 09:39	time step	#1
Andrea-wwwwwwww New Member Wenyu Zhao Join Date: Apr 2021 Posts: 18 Rep Power: 5	Can I set a fixed time step in reef3d?

April 26, 2021, 05:04		#2
kamath Senior Member Arun Kamath Join Date: Nov 2014 Location: Trondheim, Norway Posts: 265 Rep Power: 13	Hi Wenyu, Yes, you can easily switch to a fixed time stepping approach in your simulations using N 48 0 (to turn of adaptive time stepping) N 49 <123> (uses the defined time step. replace <123> with desired time step.) Information available on pp 50 of the REEF3D User Guide Hope that cleared your issue __________________ Arun X years with REEF3D

April 29, 2021, 02:50		#4
kamath Senior Member Arun Kamath Join Date: Nov 2014 Location: Trondheim, Norway Posts: 265 Rep Power: 13	No, this is currently not possible __________________ Arun X years with REEF3D

April 30, 2021, 12:05		#6
valgrinda Super Moderator Hans Bihs Join Date: Jun 2009 Location: Trondheim, Norway Posts: 377 Rep Power: 17	Flexible structures are currently not part of the code. Fully compressible flow is not supported. __________________ Hans Bihs Team REEF3D www.reef3d.com

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April 28, 2021, 21:00		#3
Andrea-wwwwwwww New Member Wenyu Zhao Join Date: Apr 2021 Posts: 18 Rep Power: 5	Hello, Mr. kamath, can I set a time step in one time period and a different time step in another time period? For example, 0-20s is set to 0.1s, 20s-30s is set to 0.05s

April 29, 2021, 04:59		#5
Andrea-wwwwwwww New Member Wenyu Zhao Join Date: Apr 2021 Posts: 18 Rep Power: 5	1.Can the structure be set as elastomer and the water as compressible in reef3d? 2.How to continue the operation after pause?