SFLOW test Problem

Yu-Jan Wang · January 9, 2024, 21:56

Hi REEF3D Team :

I tried to use SFLOW to make regular wave in a long wave tank currently, but I found the wave would decay in the spatial domain when it was propagating.
Before I asked this question, I had tested A 210 to 242. Unfortunately, the problem persists.
How can I solve this problem?

Best regards,
Wang

ctrl.txt

control.txt

messageImage_1704854751415.jpg

messageImage_1704854881313.jpg

valgrinda · January 10, 2024, 12:16

Hi Yu-Jan,

the problem is that SFLOW does not support a non-uniform mesh and B 2 confuses it a bit - sorry, this probably does not become clear from the documentation, we should update this.

In any case, for the control.txt use the following:

C 11 6
C 12 3
C 13 3
C 14 7
C 15 21
C 16 3

B 1 0.1
B 10 0.0 1650.0 0.0 0.1 0.0 5.0

M 10 12

Still, SFLOW is probably not the best for this task (even though kd is only 0.5), e.g. FNPF would be much better at this.

January 9, 2024, 21:56	SFLOW test Problem	#1
Yu-Jan Wang New Member Yu-Jan Wang Join Date: Aug 2023 Posts: 1 Rep Power: 0	Hi REEF3D Team : I tried to use SFLOW to make regular wave in a long wave tank currently, but I found the wave would decay in the spatial domain when it was propagating. Before I asked this question, I had tested A 210 to 242. Unfortunately, the problem persists. How can I solve this problem? Best regards, Wang ctrl.txt control.txt messageImage_1704854751415.jpg messageImage_1704854881313.jpg

January 10, 2024, 12:16		#2
valgrinda Super Moderator Hans Bihs Join Date: Jun 2009 Location: Trondheim, Norway Posts: 395 Rep Power: 18	Hi Yu-Jan, the problem is that SFLOW does not support a non-uniform mesh and B 2 confuses it a bit - sorry, this probably does not become clear from the documentation, we should update this. In any case, for the control.txt use the following: C 11 6 C 12 3 C 13 3 C 14 7 C 15 21 C 16 3 B 1 0.1 B 10 0.0 1650.0 0.0 0.1 0.0 5.0 M 10 12 Still, SFLOW is probably not the best for this task (even though kd is only 0.5), e.g. FNPF would be much better at this. __________________ Hans Bihs Team REEF3D www.reef3d.com

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