[hridu]

hello..

i tried to simulate 2D rectangular box in NWT(CFD)
after sometime it showing EMERGENCY STOP -- velocities exceeding critical value N 61
what is the error?
how the error occured?

control.txt
C 11 6
C 12 3
C 13 3
C 14 7
C 15 21
C 16 3
B 1 0.02
B 10 0.0 25.0 0.0 0.8 0.0 0.8
M 10 2
M 20 2

ctrl.txt
A 10 6
B 10 1
B 50 0.001
B 90 1
B 92 4
B 93 0.07 1.7
B 94 0.5
B 96 2.0 4.0
B 98 2
B 99 2
C 10 3
C 15 4
C 20 2
D 10 4
D 20 2
D 30 1
F 10 2
F 30 3
F 35 5
F 40 3
F 42 1.0
F 60 0.5
G 60 12.3 12.7 0.01 0.78 0.367 0.567
I 10 1
I 11 1
I 12 1
I 13 1
I 30 1
N 10 14
N 11 11
N 40 3
N 41 60
N 47 0.3
M 10 2
P 10 1
P 14 1
P 23 1
P 25 1
P 26 1
P 27 1
P 28 1
P 29 1
P 30 0.1
P 40 1
P 42 1.0
P 52 0.01
P 53 1
P 54 100
P 55 0.1
P 51 6.0 0.01
P 51 9.0 0.01
P 51 15.0 0.01
P 51 20.0 0.01
T 10 2
T 11 11
T 12 5
T 41 1
W 1 1000
W 22 -9.81
X 10 1
X 11 1 0 1 0 1 0
X 12 1
X 13 2
X 15 2
X 19 1
X 22 5.22
X 50 2
X 110 12.3 12.7 0.01 0.78 0.367 0.567

please tell me why this happend?