Splitting the Manikin Face Surface

The Fiala Thermal Comfort model requires a minimum of 58 part surfaces for the manikin geometry. The current geometry only contains 57 part surfaces. As the manikin has a single surface for the face, instead of the required left and right face surfaces, you split the surface into two distinct surfaces using the Intersect tool in the Surface Repair tool.

To split the manikin face surface:
  1. Right-click the Geometry > Parts > Cabin > Driver node and select Repair Surface....
  2. In the Surface Repair Options dialog, click OK.
  3. Click anywhere in the CabinComfort - Repair Surface 1 window, then click F on your keyboard and zoom into the face of the manikin.
  4. Intersect the manikin Face surface:
    1. In the Repair Surface 1 window, double-click on the face of the manikin.


    2. In the Global tab, select (Intersect or Boolean selected faces).
    3. For Face Set 1, click (Add selected faces to the set).
    4. For Face Set 2, set Mode to Plane.
    5. For Plane Origin, select Pick..., then position the point as shown in the image below:


    6. Set Plane Normal to [0.0, 1.0, 0.0].
    7. Activate Display Plane Tool.
    8. Click Intersect.
      The Intersect tool slices the face surface into two distinct surfaces, one for the left-hand side of the face and one for the right-hand side. The intersection creates a new edge. To define the new part surfaces, you can flag this edge as a part curve.
  5. In the Repair tab, select (Flag edges as feature).
When you split the manikin into the 58 part surfaces, you must ensure that each part surface area matches the areas that are defined for the Fiala manikin [958]. For the Face_L and Face_R part surfaces the surface areas must equal 0.16 m2 and 0.14 m2 respectively. If you do not define the surface areas correctly, Simcenter STAR-CCM+ can produce incorrect results.
  1. Calculate the areas of the face surfaces:
    1. Select the part surface highlighted in the following image:


    2. In the Query tab, select Area of selected face(s).
      The Output window displays a target face area for the left hand face of around 0.16 m2.
    3. Select the part surface highlighted in the following image:


    4. In the Query tab, select Area of selected face(s).
      The Output window displays a target face area for the right hand face of around 0.14 m2.
  2. Define the face part surface names:
    1. With the same face still selected, in the Organize tab, set New Part Surface to Face_R and click Modify....
    2. Select the part surface highlighted in the following image:


    3. Set New Part Surface to Face_L and click Modify....
    4. Click Close.
You now have the two required surfaces for the face. As you no longer need the original face surface, you delete it.
  1. Right-click the Driver > Surfaces > Face node and select Delete
  2. Save the simulation.