Immersed Boundary Mesh dialog box (Flow/ESC)

Mesh Name
Mesh Name	Sets a name for the mesh.
Mesh Boundaries
Select Bodies	Lets you select the bodies to define the fluid mesh boundaries of the main fluid domain.
Embedded Features
Select Bodies	Lets you select the bodies, which represent fluid domains that are connected to the main fluid domain through screens or internal fans. The generated immersed boundary mesh represents one enclosed fluid domain.Internal body selected as embedded feature****Internal body selected as boundary feature
Boundary Cells
Boundary Cell Size	Sets the cell size for the walls of the immersed boundary mesh.
Automatic Element Size	Computes an estimated boundary cell (element) size. The Boundary Cell Size field updates to show the estimated value.Note: The size calculated by Automatic Element Size is only an estimate. Carefully evaluate your model and use good engineering judgment when determining the size, regardless of whether you accept the software’s estimate or specify a different size. This evaluation should consider both the unique features of your model's geometry and the requirements of your analysis.
Use Automatic Refinement	Activates the automatic refinement on the mesh boundaries and embedded features selection. The software determines the optimal resolution required to correctly capture the boundaries. You specify a maximum subdivision value from the Max Subdivision list. You can choose between 1 and 8.The software computes and displays the minimum boundary cell size value in the Minimum Cell Size (Read-Only) box as follows: R/2x, where R is the boundary cell size value and x is the maximum subdivision value. For each problematic section of your model, it uses an appropriate local resolution value that is between the minimum and boundary cell sizes.
Internal Cells
Use Boundary Cell Size	Uses the same element size for boundary and interior cells.
Growth Factor	Available when the Use Boundary Cell Size check box is cleared.Specifies a growth factor to compute the maximum element size for interior cells. You can choose between 1 and 8.The software computes and displays the maximum interior cell size value in the Maximum Cell Size (Read-Only) box as follows: R**2x*, where R is the boundary cell size value and x is the growth factor value. For each section of your model, it uses an appropriate local resolution value that is between the boundary and maximum cell sizes.
Interior Point
Select Point	Lets you select a point that is in the interior of the fluid domain. The software starts the meshing process from this point, which must not touch any boundaries or embedded features in close proximity to the cell size area.
Destination Collector
Automatic Creation	Creates a collector using the default physical properties automatically, and inherits the material properties of the idealized part.Note: Because you are meshing the void between solid bodies, which represent the fluid domain, make sure to define a fluid material in the mesh collector.Clear the Automatic Creation check box to choose an existing mesh collector from the Mesh Collector list.
Mesh Collector	Available when the Automatic Creation check box is cleared.Lets you select an existing collector. Click New Collector to create additional mesh collectors.

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Immersed boundary meshing

CFD simulation using the immersed boundary method

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Immersed Boundary Mesh dialog box (Flow/ESC), Simcenter 3D 2021.1 Series

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