Boundary conditions problem REEF3D
 

Hi REEF3D team.

I am a student at the Rovira i Virgili University and I am working on a hydraulic structure in REEF3D, but I have a problem that I cannot identify. I am using as boundary condition B 60 1 (constant flow) and also B 61 2 (logarithmic profile bed), B 75 1 (zero gradient), B 76 1 (zero gradient pressure), B 77 1 (outflow controlled, zero gradient). pressure), and the model is emptying, showing zero flow at the outlet at the end of the simulation, but indicating that flow is entering. I attach an image of the beginning (1 second) and the end of the simulation (70 seconds). The calculation domain is 15 m long, 3.9 m wide, and 1.50 m high, with a mesh size of 3 cm. The exit ist only by the face right (C14 2).- I used 23.12 version

Could you help me please to identify the problem?

And in B31 the units are Pa?

Attachment 98915

Attachment 98916

Attachment 98917

Control:
B 1 0.03
B 10 0.0 15.0 0.0 3.9 0.0 1.5
B 130 1
C 11 1
C 12 21
C 13 21
C 14 2
C 15 21
C 16 3
S 1 1
M 10 32


Ctrl:
B 10 1
B 30 2
B 31 84753
B 50 0.003
B 60 1
B 61 2
B 77 1
D 10 4
F 30 3
F 40 3
F 50 1
F 56 0.35
F 60 0.35
I 10 1
M 10 32
N 40 3
N 41 80
N 47 0.2
P 10 1
P 25 1
P 29 1
P 30 0.25
P 71 1
P 75 1
P 79 1
T 10 2
W 1 997.9
W 10 0.300
W 22 -9.81

Looks like there was a problem with the potential flow initialization. It is fixed in the newest RC (release candidate on github).