Computational domain

This section explains the preparation of surfaces to create the domain. This is done with the operations splitting, combining and renaming of the surfaces.

Piston Solid Surfaces

Select CAD Surfaces piston in the Geometric Entities Panel.
Select Split by Angle from the Operation drop-down list in the Properties Panel.
Enter 75 deg for Angle and 15 for Maximum No. of Splits, click Split by Angle. Sixteen new CAD Surfaces are created in the Geometric Entities Panel.
Select CAD Surfaces piston_01 and piston_03. Select Combine from the Operation drop-down list in the Properties Panel. Click Combine and rename as piston_underside.
Select CAD Surfaces piston_05 and piston_06. Select Combine from the Operation drop-down list in the Properties Panel. Click Combine and rename as piston_top.
Select CAD Surfaces pistonfluid_14, pistonfluid_15 and rename as piston_secondring, piston_topring respectively.
Select CAD Surfaces piston_02 in the Geometric Entities Panel. Select Split by Angle from the Operation drop-down list in the Properties Panel.
Enter 30 deg for Angle, click Split by Angle. Five new CAD Surfaces are created in the Geometric Entities Panel.
Select CAD Surfaces pistonfluid_02_01 and rename as piston_skirt respectively.
Select the remaining CAD Surfaces and select Combine from the Operation drop-down list in the Properties Panel. Click Combine and rename as piston.

Figure 7.239 - Piston Solid surfaces