Creo Flow Analysis > Preprocessing > Defining Physics > Cavitation > Output Variables
  
Output Variables
This section describes the outputs you can obtain from the Cavitation module. The following types of data are available for output from the Cavitation module:
• Primary Variables
• Property Variables
• Derived Variables
• Integrated Quantities
• Surface Distribution
Output of Primary Variables
Primary variables are the fundamental variables for a given set of modules and models. They are required as part of the solution.
Primary Variables for Cavitation Module
Label in Variables List
Label in X-Y Plot Menu
Label in points.txt
Definition
Units
Display or Output Options
Relevant Cavitation Models
Gas Mass Fraction
Gas Mass Fraction
Fgas_
NCG mass fraction (over fluid mass)
At a Point and in the GUI Display Window
All
Vapor Mass Fraction
Vapor Mass Fraction
Fvap_
Vapor mass fraction (over fluid mass)
At a Point and in the GUI Display Window
All
Dissolved Gas Mass Fraction
Dissolved Gas Mass Fraction
Dgas_
Dissolved NCG mass fraction (over fluid mass)
At a Point and in the GUI Display Window
Equilibrium Dissolved Gas, Dissolved Gas, Full Gas
Primary variables are automatically activated for selected geometric entities such as boundaries, derived surfaces, interfaces, streamlines, particles, or volumes depending on the modules and models that are selected.
Output of Property Variables
Property variables are the physical properties for the fluids and solids in the domain. They are required as part of the solution.
Property Variables for Cavitation Module
Label in Variables List
Label in X-Y Plot Menu
Label in points.txt
Definition
Units
Display or Output Options
Relevant Cavitation Models
Gas Schmidt Number
Gas Schmidt Number
Sg_
Schmidt number of the NCG
At a Point and in the GUI Display Window
Variable Gas Mass Fraction, Dissolved Gas, Full Gas
Vapor Schmidt Number
Vapor Schmidt Number
Sv_
Schmidt number of the NCG
At a Point and in the GUI Display Window
All
Dissolved Gas Schmidt Number
Dissolved Gas Schmidt Number
Sd_
Schmidt number of the Dissolved NCG
At a Point and in the GUI Display Window
Dissolved Gas, Full Gas
Physical property output for the Cavitation module is automatically activated for selected volumes and boundaries, except point probes, depending on the models that are selected.
Output of Derived Variables
Derived variables are engineering data computed from the primary variables. While not required as part of the solution, they can provide valuable information for analysis of the results.
Derived Variables for Cavitation Module
Label in Variables List
Label in X-Y Plot Menu (At a Point)
Label in points.txt
Definition
Units
Display or Output Options
Relevant Cavitation Models
Gas Volume Fraction
Gas Volume Fraction
volFracGas_
Local volume fraction of the NCG
At a Point and in the GUI Display Window
All
Vapor Volume Fraction
Vapor Volume Fraction
volFracVap_
Local volume fraction of vapor
At a Point and in the GUI Display Window
All
Dissolved Gas Volume Fraction
Dissolved Gas Volume Fraction
volFracDGas_
Local volume fraction of the Dissolved NCG
At a Point and in the GUI Display Window
Equilibrium Dissolved Gas, Dissolved Gas, Full Gas
Total Gas Volume Fraction
Total Gas Volume Fraction
volFracT_
Local volume fraction of all gases
At a Point and in the GUI Display Window
All
Derived variable output for the Cavitation module is automatically activated for selected volumes and boundaries, (other than point probes) depending on the models that are selected.
Output of Integrated Quantities
Integrated output are quantities that are integrated over a Boundary, Interface, or Volume.
Integrated Quantities for Cavitation Module
Label in Variables List
Label in X-Y Plot Menu
Label in integral.txt
Definition
Units
Relevant Geometric Entity
Relevant Cavitation Models
Gas/Vapor Area (Fraction)
Gas Area
gas_area_
Average area fraction on a boundary
m2
Boundary
All
Gas/Vapor Area (Fraction)
Vapor Area
vap_area_
Average vapor fraction on a boundary
m2
Boundary
All
Gas/Vapor Area (Fraction)
Gas Area Fraction
gas_af_
Area of the free gas on a boundary
Boundary
All
Gas/Vapor Area (Fraction)
Vapor Area Fraction
vap_af_
Area of the vapor on a boundary
Boundary
All
All Gas Volume
All Gas Volume
gas_v_t_
Total volume of all gas (vapor, dissolved NCG, free NCG, or both free and dissolved NCG in a selected volume)
m3
Volumes
All
All Gas Volume Fraction
Total Gas Volume Fraction
gas_vf_t_
Average volume fraction of all gases combined (vapor, dissolved NCG, and free NCG) in a selected volume
Volumes
All
Gas Volume
Gas Volume
gas_v_
Total volume of free NCG in a selected volume
m3
Volumes
All
Gas Volume Fraction
Gas Volume Fraction
gas_vf_
Average volume fraction of free NCG in a selected volume
Volumes
All
Liquid Volume
Liquid Volume
liq_v_
Total volume of liquid in a selected volume
m3
Volumes
All
Liquid Volume Fraction
Liquid Volume Fraction
liq_vf_
Average volume fraction of liquid in a selected volume
Volumes
All
Vapor Volume
Vapor Volume
vap_v_
Total volume of vapor in a selected volume
m3
Volumes
All
Vapor Volume Fraction
Vapor Volume Fraction
vap_vf_
Average volume fraction of vapor in a selected volume
Volumes
All
Surface Distributions
This type of output returns the distribution or profile of a selected quantity over a selected boundary.
Quantity
File name
Comments
Gas Volume Fraction Distribution
Filename_xxxx_boundary_name_total_volume_fraction.txt
Solid boundaries or interfaces only
 
• Surface Distributions file has ASCII text file format as shown below.
• Surface Distributions are output at the same frequency as the result files are saved.
• The Cavitation module Surface Distributions are available as output for Walls and other solid boundaries such as conjugate interfaces.