User Guide 014

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Output Group File Specification

For large grids or long simulations, outputting all of the variables to a single XMDF solution file can lead to a file that is unmanageable. To help reduce to the size of the output files each variable group listed in Table 54 can be output into separate files. The table below lists and describes the CMS-Flow cards used to specify the output file names for each variable group.

Table 2-110. Variable group output file name specification.

Card Arguments Default Description
WSE_OUT_FILE Character none Specifies the XMDF output file name for the water level group
VEL_OUT_FILE Character none Specifies the XMDF output file name for the current velocity group
EDDY_VISCOSITY_OUT_FILE Character none Specifies the XMDF output file name for the eddy viscosity group
VISC_OUT_FILE Character none Specifies the XMDF output file name for the eddy viscosity group (same as card above)
TRANS_OUT_FILE Character none Specifies the XMDF output file name for the transport group
MORPH_OUT_FILE Character none Specifies the XMDF output file name for the morphology change group
WIND_OUT_FILE Character none Specifies the XMDF output file name for the wind group

Advanced Global Output

In addition to the variables specified in the SMS interface, CMS has the option to output advanced mode output including the bed shear stress, bed composition, wind speed, etc.

Table 2-111. Advanced output datasets.

Card Arguments Default Description
WIND_OUT_TIMES_LIST integer 0 Output time series id for wind velocity and magnitude in m/s.
STRESS_OUT_TIMES_LIST integer 0 Output time series id for mean bed shear stress in Pa.
WAVE_OUTPUT_DETAILS ON

OFF

OFF Outputs additional wave variables including wave direction, radiation stresses, breaking dissipation and roller energy.

XMDF File Compression

The standard CMS-Flow output is written to an XMDF file with the name <Case Name>_sol.h5. The binary file may be written in compressed for-mat using the card described in the table below.

Table 2-112. CMS-Flow card for compressing the XMDF output file

Card Arguments Default Description
XMDF_COMPRESSION ON

OFF

OFF Compresses the XMDF file

ASCII Files

In addition to the XMDF output file, CMS-Flow provides the output two types of ASCII output files:

1. Tecplot snap shot (*.dat), and history files (*.his)
2. SMS Super ASCII files (*.sup, *.xy, *.dat)

The CMS-Flow cards used for outputting these two types of files are described in the table below.

Table 2-113. CMS-Flow cards used to output Tecplot and SMS Super ASCII

Card Arguments Default Description
GLOBAL_TECPLOT_FILES ON

OFF

OFF Outputs Tecplot ASCII files
GLOBAL_SUPER_FILES ON

OFF

OFF Outputs Super ASCII files

Observation Cells (Save Points)

Time series at selected Observation cells is set in the Cells tab of the CMS-Flow Model Control window. A description of CMS-Flow cards used for specifying Observational cells are described below.

Fig 2-100.png

Figure 2-100. Cells tab in SMS 11.0

Table 2-114. CMS-Flow card for compressing the XMDF output file

Card Arguments Description
TIME_SERIES_INCREMENT real Sets the output time increment for the Time series Observation points.
ELEV_OBS_CELLS_BEGIN none Marks the beginning of a Times series Observation point list.
ELEV_OBS_CELLS_END none Marks the end of a Times series Observation point list.
FLOW_RATE_INCREMENT real Sets the output time increment for the Flow rate Observation points.
FLOW_OBS_CELLS_BEGIN none Marks the beginning of a Flow rate Observation point list.
FLOW_OBS_CELLS_END none Marks the end of a Flow rate Observation point list.
Q_TRANS_INCREMENT real Sets the output time increment for the Flow rate Observation points.
Q_TRANS_OBS_CELLS_BEGIN none Marks the beginning of a Transport Observation point list.
Q_TRANS_OBS_CELLS_BEGIN none Marks the end of a Transport Observation point list.


Simulation Statistics

CMS V4.0 has the option to calculate statistics over the whole model do-main for a user-specified time period. This option is accessed using the advanced cards. The starting time, end time, and time interval should be specified in hours with respect to the model start time. The time interval should be larger or equal to the hydrodynamic time step. When activated the statistics are written to the XMDF Global Solution File in a subfolder named stats. The CMS-Flow cards related to the statistics are described below.

Table 2-115. CMS-Flow cards related to output statistics

Card Arguments Description
GLOBAL_STATISTICS [start time] [end time] [interval] Turns on the statistics for hydrodynamics, sediment transport, and salinity.
FLOW_STATISTICS [start time] [end time] [interval] Turns on the statistics for hydrodynamics transport.
SEDIMENT_STATISTICS [start time] [end time] [interval] Turns on the statistics sediment transport.
SALINITY_STATISTICS [start time] [end time] [interval] Turns on the statistics for salinity.

Notes:

• The units of the starting time, end time, and interval are hours.
• If the interval is not specified, the initial time step is used as the interval.

A description of the hydrodynamic, sediment, salinity statistics is provided in the tables below.

Table 2-116. Hydrodynamic Statistics

Statistic Name Dataset Description
Maximum Current Velocity Vector Current_Max Maximum current velocity vector in m/s. Can be either negative or positive.
Maximum Current Velocity Magnitude Current_Max_Mag Maximum current velocity magnitude in m/s.
Maximum Water Level Water_Level_Max Maximum water level in m.
Residual Current Velocity Vector Current_Velocity Average current velocity vector in m/s.
Residual Current Velocity Magnitude Current_Velocity_Mag Average current velocity magnitude in m/s.
Hydroperiod Hydroperiod Fraction of time a computational cell is wet (i.e. 0-never dry, 1-always wet).
Maximum water level gradient magnitude WSE_Grad_Max_Mag Maximum water level gradient magnitude in m/m.
Maximum current velocity gradient magnitude Cur_Grad_Max_Mag Maximum current velocity gradient
Average x-Velocity Normalized L-2 Norm Vx_Norm_Res Average normalized L-2 norm of the momentum equation in the x-direction
Average y-Velocity Normalized L-2 Norm Vy_Norm_Res Average normalized L-2 norm of the momentum equation in the y-direction
Average Pressure Normalized L-2 Norm Pres_Norm_Res Average normalized L-2 norm of the pressure correction equation. The pressure is in units of m2/s2.

Table 2-117. Sediment Statistics

Statistic Name Dataset Description
Maximum Total-load Sediment Transport Rate vector Sed_Transp_Max Maximum total-load sediment transport rate vector in units of kg/m/s. Can be either negative or positive.
Maximum Total-load Sediment Transport Rate Magnitude Sed_Transp_Max_Mag Maximum total-load sediment transport rate magnitude in units of kg/m/s.
Net Total-load Sediment Transport Rate Magnitude Sed_Transp_Net Net total-load sediment transport rate vector in units of kg/m/s. Can be either negative or positive.
Net Total-load Sediment Transport Rate Magnitude Sed_Transp_Net_Mag Net total-load sediment transport rate magnitude in units of kg/m/s.
Gross Total-load Sediment Transport Rate Magnitude Sed_Transp_Gross Gross total-load sediment transport rate vector in units of kg/m/s. Can be either negative or positive.
Gross Total-load Sediment Transport Rate Magnitude Sed_Transp_Gross_Mag Gross total-load sediment transport rate magnitude in units of kg/m/s.
Maximum Bed Slope Gradient Magnitude Bed_Grad_Max_Mag Maximum gradient of the bed slope in units of m/m.

Table 2-118.Sediment Statistics

Statistic Name Dataset Description
Average Salinity Concentration Salinity_Avg Average salinity concentration in units of ppt.

Diagnostic File

To Be Completed

Fig 2-290.png

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