Engine Keyword Sets printout frequency for output
file.
Format
/PRINT/Nprint/N_line
Definition
Field |
Contents |
SI Unit Example |
Nprint |
Printout every
Nprint cycle on
file Runname_nnnn.out Default =
-1000
|
|
N_line |
Prints the column header
line in every N_line in the
Runname_nnnn.out file. Default =
55
|
|
Comments
- If
Nprint is negative, the
printout is made in the standard output, as well as in the output file. If
Nprint is positive, the
printout is only made in the output file.
The energy error in the
Radioss Engine output file
(
_0001.out...
_9999.out) is defined
as:
(1)
Where,
-
- Kinetic energy
-
- Rotational kinetic energy
-
- Internal energy
-
- Initial translational kinetic energy
-
- Initial rotational kinetic energy
-
- Initial internal energy
-
- External work
-
- Initial external work
Hourglass energy is not included in internal energy.
Normal
amount of hourglass energy is about 10% to 15%.
Hourglass energy is not a
true energy error, but a part of internal energy computed with a non-physical
equations. If this energy remains small, the assumptions concerning these
equations are acceptable.
Initial values are values at cycle zero and not
at time zero.
At time t=0, err% =0 the energy error is bounded at ±
99%.