The Inflation Option settings determine the heights of the inflation layers. The following options are available:
The computations used for prism layer growth are as follows:
The following value is computed at each node on the prism base:
Height of last prism (H) = Transition Ratio * average edge length
The height of the first layer (h) is computed using the following formula, where g = Growth Rate, n = Number of Layers and H = Height of last prism:
H = h * (g ^ (n-1))
Increasing the value of the Growth Rate control reduces the total height of the inflation layer. The total height approaches an asymptotic value with respect to the number of inflation layers.
For details about the additional controls that appear when Transition Ratio, Maximum Layers, and Growth Rate controls.
is selected, refer to the descriptions of theNote: The option works differently for the MultiZone mesh method. See MultiZone Support for Inflation for details.
Number of Layers and Growth Rate controls to obtain a total thickness as defined by the value of the Maximum Thickness control. Unlike inflation with the option, with the option the thickness of the first inflation layer and each following layer is constant.
- The option creates constant inflation layers using the values of theFor details about the additional controls that appear when Number of Layers, Growth Rate, and Maximum Thickness controls.
is selected, refer to the descriptions of theFirst Layer Height, Maximum Layers, and Growth Rate controls to generate the inflation mesh. Unlike inflation with the option, with the option the thickness of the first inflation layer and each following layer is constant.
- The option creates constant inflation layers using the values of theFor details about the additional controls that appear when First Layer Height, Maximum Layers, and Growth Rate controls.
is selected, refer to the descriptions of theFirst Aspect Ratio, Maximum Layers, and Growth Rate controls to generate the inflation mesh.
- The option creates inflation layers using the values of thePost inflation is not supported when Inflation Option is .
For details about the additional controls that appear when First Aspect Ratio, Maximum Layers, and Growth Rate controls.
is selected, refer to the descriptions of theFirst Layer Height, Maximum Layers, and Aspect Ratio (Base/Height) controls to generate the inflation mesh.
- The option creates inflation layers using the values of theFigure 55: Last Aspect Ratio Option illustrates this option. With the Last Aspect Ratio method, the First Layer Height is specified. The offset height for the last layer is calculated from the local base mesh size and specified Aspect Ratio (base/height). For example, if you specify a value of 3 for Aspect Ratio (base/height), the offset height of the last layer will be the local base mesh size divided by 3. The local growth rate is calculated using Maximum layers to create exponential growth through the intermediate layers.
Post inflation is not supported when Inflation Option is .
For details about the additional controls that appear when First Layer Height, Maximum Layers, and Aspect Ratio (Base/Height) controls.
is selected, refer to the descriptions of the
Note: For bodies meshed with the Body Fitted Cartesian method, the Inflation option cannot be changed. If Physics Preference is set to , then three inflation layers are created with total thickness proportional to Element Size. For any other physics preference, a single inflation layer is created with thickness proportional to element size.