39.2.2.5. Cylinder Section Setting

Here, user can set all options related to cylinder body.

Profile

Profile defines an offset data in angle and height coordinate. User can apply arbitrary cylinder shape to EHD analysis by setting this offset table data. Please refer to here.

../_images/image0647.png — Figure 39.57 **Cylinder Profile** dialog box

Film Thickness

Film Thickness sets user-defined thickness distribution data in axial direction of base body. The method of user defined thickness data is making one dimensional profile data similar to offset profile. User can set the oil to a sufficient and deficient condition with this data.

../_images/image0658.png — Figure 39.58 **User Defined Film Thickness** dialog box

Height Length: Defines profile height length for user defined thickness.
Reference Marker: Select reference marker of base body to define profile data. Height direction of profile is the same as Y axis of the marker.
Number of Height: Defines number of heights of profile data in height direction.
Create Data Field Uniformly: Make profile data for user defined thickness according to defined height length and number of heights. Profile coordinate in height direction is generated automatically at interval where height length is divided by the (number-1). The height range is from –L/2 to L/2. Default value for thickness is the same as initial clearance between piston and cylinder.
Import & Export: User can make profile data chart by *.csv file format by exporting profile chart for used defined thickness in dialog. Additionally, user can also import the *.csv file and modify current profile data in dialog. This is one dimensional array unlike offset profile.
Up/Down Stroke Signal: Define an expression to determine up/down stroke situation. If expression value is +, it means the up-stroke situation. EHD solver uses the thickness profile in up stroke situation. If expression value is -, it means the down stroke situation.