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Specifying Calculation Control Options
By default, calculation of comfort parameters is disabled in FloEFD to save the CPU time
and memory resources. Besides comfort parameters, FloEFD is capable of calculating
Local Mean Age (LMA) and Local Air Change Index (LACI) parameters:
• LMA is the average time for fluid to travel from the selected inlet opening to the
point considering both the velocity and diffusion.
• LACI (Local Air Change Index) is the ratio of the V/Q value, where V is the
computational domain fluid volume and Q is the volume flow rate of the fluid
entering this volume, to the average time  for the fluid to travel from the selected
inlet opening to the point considering both the velocity and diffusion.
Calculation of comfort parameters, LMA and LACI can be enabled in the Calculation
Control Options dialog.
1 Click Flow Analysis > Calculation Control Options.
 In Creo Parametric click Flow Analysis > Project > Calculation Control Options.
2 Switch to the Advanced tab.
3 Select the Calculate Local Mean Age (LMA)
and Calculate Comfort Parameters check
boxes.
 Selecting Calculate Local Mean Age (LMA)
check box enables calculation of LMA,
Dimensionless LMA and LACI.
4 Click OK.
Specifying Goals
Specify global goals of Av Mean Radiant
Temperature, Av Operative Temperature, Av
Velocity and Av Volume Fraction of Expired
Air.
 You can use Mean Radiant Temperature and Operative Temperature as the goal
parameters only after you enable calculation of comfort parameters in the Calculation
Control Options dialog.
Adjusting Initial Mesh
1 Click Flow Analysis > Initial Mesh.
 In Creo Parametric click Flow Analysis > Mesh > Initial Mesh.
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