Control the Variables that are Written to the FV-UNS Files
AcuTrans can be used to restrict the number of variables that are written into each FV-UNS file.
This feature provides you with a high level of control over the size of the FV-UNS files that are created. By default, AcuSolve will write all variables associated with the NODAL_OUTPUT command. However, you can add to this list by turning on additional command line options, or reduce the size of this list by specifying the desired variables individually. Consider, for example, a turbulent thermal flow simulation. The simplest AcuTrans command: acuTrans -out -to fieldview.
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acuTrans: Nodal output vars = velocity,pressure,temperature,eddy_viscosity,surface_y_plus,surface_film_coefficient,wall_shear_stress
acuTrans -out -to fieldview -extout
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acuTrans: Nodal output vars = velocity,pressure,temperature,eddy_viscosity,surface_y_plus,surface_film_coefficient,wall_shear_stress,grad_velocity,grad_pressure,grad_temperature,grad_eddy_viscosity,volume,strain_rate_invariant_2,velocity_magnitude,vorticity,cfl_number
acuTrans: Nodal output vars = velocity,pressure,temperature,eddy_viscosity,surface_y_plus,surface_film_coefficient,wall_shear_stress,grad_velocity,grad_pressure,grad_temperature,grad_eddy_viscosity,volume,strain_rate_invariant_2,velocity_magnitude,vorticity,cfl_number,density,viscosity,material_viscosity,gravity,specific_heat,conductivity,heat_source,turbulence_y,turbulence_y_plus,residual_velocity,residual_pressure,residual_temperature,residual_eddy_viscosity
acuTrans -out -to fieldview -extout -outv velocity,pressure,residual_velocity,residual_pressure
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acuTrans: Nodal output vars = velocity,pressure,residual_velocity,residual_pressure
This command sequence produces FV-UNS files that are greatly reduced in size and contain only the variables that you are interested in. This preserves disk space and increases both the conversion and file reading time. Note that if you request a variable that is not available in the output database, AcuTrans gives an error and exits. This behavior can be overridden by providing the -imv or -ignore_missing_variables command line option. In this case, the missing variables are simply skipped and the remaining variables are converted.