VOLUME_INT#
VOLUME_INT = {volume_type} <blk_id> <species_no> <file_string> [float_list]
Description / Usage#
The VOLUME_INT card activates computation of specified volumetric integrals during post processing. As many of these VOLUME_INT cards as desired can be input to Goma. Definitions of the input parameters are as follows:
<volume_type> |
Several choices of volumetric integral are allowed and are referenced through this parameter. The permissible values and corresponding volume integral follow:
|
<blk_id> |
The element block id for which the volume integral is requested. |
<species_no> |
The species number for SPECIES_MASS volume integral. |
<file_string> |
A character string that corresponds to the name of the text file that will receive the results of the integration at each time step. |
[float_list] |
A floating point value that specifies the length scale of the smooth Heaviside function. This parameter is only used for VOLUME_INT cards in which the {volume_type} is {POSITIVE|NEGATIVE} _FILL or NEGATIVE_V{X|Y|Z}. The float list is also used for the constants A, B, C, etc in the SURFACE_SPECIES type. |
Examples#
Here is an example of an input deck with 3 VOLUME_INT cards.
Post Processing Volumetric Integration =
VOLUME_INT = VOLUME 1 0 volume.out
VOLUME_INT = SPECIES_MASS 2 3 species3.out
VOLUME_INT = NEGATIVE_FILL 1 0 fill.out 0.1
END OF VOLUME_INT
Technical Discussion#
The volume integrations are carried out as follows:
volume_type |
volume integral |
VOLUME |
\(\int\) dV |
DISSIPATION |
\(\int\) (-p \(\zeta + \tau\)) • \(\Delta\) vdV |
JOULE |
\(\int\) \(\frac{1}{\sigma}\) J • JdV |
SPECIES_MASS |
\(\int\) \(c_jdV\) |
MOMENTUM_{X|Y|Z} |
\(\int\) \(\rho\) (i|j|k) • vdV |
STRESS_TRACE |
\(\int\) tr(-p \(\zeta + \tau\)) dV |
{POSITIVE|NEGATIVE}_FILL |
\(\int\) H(\(\phi\)) dV |
NEGATIVE_V{X|Y|Z} |
\(\int\) H(\(\phi\)) {i|j|k} • vdV |
POROUS_LIQ_INVENTORY |
\(\int\) [\(\rho_{gas}\) \(\phi\) (1-S) + \(\rho_{liq}\) \(\phi\) S] dV |
References#
No References.