Region (Void) dialog box (Thermal/Flow/ESC/Multiphysics)

Name
Name	Sets the name for the void region. The name appears under the Regions node in the Simulation Navigator and in the Region lists in the Thermal Void dialog box.
Label	Specifies a unique identifier for the void region.
Region Objects
Group Reference	Applies the region to the selected group.For more information, see Group Reference options.
Select Object	Lets you select the faces, edges, or elements to define the fluid-solid interface of the void region.Excluded lets you remove individual entities from within your selected object. The software does not apply the simulation object to the excluded elements.Note: The Element Selection Filtering options are available when the Type Filter list on the Top Border bar is set to Elements.
Stacked Smart Selector Methods	Opens the Smart Selector Methods dialog box where you can specify a progression of smart selection filters.For more information, see Smart Selector Methods dialog box.
Pressure
Pressure	Sets the pressure of the void region.For more information, see Additional magnitude options.
Heat Transfer
Area for Internal Edges	Specifies how to compute the convective area for loads applied to the internal edges of 2D elements having different thicknesses on either side.Subtract ThicknessesSubtracts the thicknesses of the internal edges and takes the absolute value of the subtraction.Add ThicknessesAdds the thicknesses of the internal edges and takes the absolute value of the addition.
Area Correction	Specifies how the solver corrects the convective area.NoneDoes not account for area correction.FactorDefines the area correction factor to compute the corrected convective area. You specify the value in the Area Correction Factor box.OverrideDefines the corrected convective area. You specify the value in the Area Override box. This option is only available when Area for Internal Edges is set to Add Thicknesses.
Heat Transfer Coefficient	Sets a value for the heat transfer coefficient.For more information, see Additional magnitude options.
Rotational Effects	Specifies how to account for total temperature effects in convective heat transfer due to rotating parts.Neglect Wall RotationUse this option when the components that surround the fluid are stationary or when the components are rotating at low speeds, for example in heat transfer to a stator. The fluid temperature is assumed to be the absolute total temperature, Tt,abs.Correct for Wall RotationUse this option when the components that surround the fluid are rotating. The fluid temperature is assumed to be the absolute total temperature, Tt,abs.Relative Temperature Reference FrameUse this option when components that surround the fluid are rotating. The fluid temperature is assumed to be the relative total temperature, Tt,rel.
Swirl Input Type	Specifies how the swirl of the void region is defined. The thermal solver uses the specified value to relate total temperatures and relative temperatures.Swirl VelocityDefines the swirl velocity, vΦ. Specify the value in the Swirl Velocity box.Swirl RatioDefines the swirl ratio, ωfluid/ωrotor. Specify the value in the Swirl Ratio box.Relative Temperature DifferenceDefines the relative temperature difference, ΔTrel. Specify the value in the Relative Temperature Difference box.For more information, see Additional magnitude options.

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Region (Void) dialog box (Thermal/Flow/ESC/Multiphysics), Simcenter 3D 2021.1 Series

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