Good afternoon, I am making a naysCube model of an estuary, for which I am using “Movable bed”, “2nd order non-linear k-e model”, “TVD MUSCL”, a constant flow of 0.3 m3/s, “changeable wet and dry cells” -> 0.01 (m), roughness 0.1 (manning), grain size 0.019 (m) and the rest by default. I would like to model 3600 sec, “start time of bed move” ->300 sec, but I have tried with Variable DT whit CFL contidition Variable DT and Fixed DT, and it produces an error, which I attached, I don’t know why, my mesh is 10 cm.
On the other hand I have doubts with the data while processing, because several of these I do not know what they mean as the following:
KT= 320130 T= 320.128999999756 SLOPE=1/ 55.7742877510784
SI_now= 1.792940869927406E-002
Q_hyd= 0.300000000000000 320.128999999756 0
QIN(i),Q_hyd 1 0.300000000000000 0.300000000000000
QIN(i),Q_hyd 2 0.300341738022331 0.300000000000000
NN_count = 50
LOOP_SURF= 3
cBANK LOOP = 1
IBANK = 7
SLPMAX = 0.000000000000000E+000
cBANK LOOP = 2
IBANK = 2
SLPMAX = 0.000000000000000E+000
cBANK LOOP = 3
IBANK = 0
SLPMAX = 0.000000000000000E+000
wet_and_dry in 1
コメント
DId you try smaller value for DT?
According with CFL condition, to large DT yeilds overflow of computation and occurs this kind of error.
There are several possible causes for this, but it is not possible to determine what is the cause without looking at the calculation area and calculation conditions.
If you get this error even if you make the DT smaller, please show the figure such as the calculation area and the grid. Or upload the ipro file for confirmation.
Hi everyone,
I hope this message finds you well,
I am using NaysCube model to carry out 3D simulation. I had some troubles when I used the 2nd and 3rd-order k-epsilon model and spatial scheme for advection terms TVD MUSCL.
In the beginning, the model is going stable, and after it generates NAN. The result that I got is not described the physics.
I was wondering if you can help me
Thank you