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7.18.1 Inputs for Solid Zones

You will set all solid conditions in the Solid panel (Figure  7.18.1), which is opened from the Boundary Conditions panel (as described in Section  7.1.4).

Figure 7.18.1: The Solid Panel
figure



Defining the Solid Material


To define the material contained in the solid zone, select the appropriate item in the Material Name drop-down list. This list will contain all solid materials that have been defined (or loaded from the materials database) in the Materials panel. If you want to check or modify the properties of the selected material, you can click Edit... to open the Material panel; this panel contains just the properties of the selected material, not the full contents of the standard Materials panel.



Defining a Heat Source


If you wish to define a source of heat within the solid zone, you can do so by enabling the Source Terms option. See Section  7.28 for details.



Defining a Fixed Temperature


If you wish to fix the value of temperature in the solid zone, rather than computing it during the calculation, you can do so by enabling the Fixed Values option. See Section  7.27 for details.



Specifying the Rotation Axis


If there are rotationally periodic boundaries adjacent to the solid zone or if the zone is rotating, you must specify the rotation axis. To define the axis, set the Rotation-Axis Direction and Rotation-Axis Origin. This axis is independent of the axis of rotation used by any adjacent wall zones or any other cell zones. For 3D problems, the axis of rotation is the vector from the Rotation-Axis Origin in the direction of the vector given by your Rotation-Axis Direction inputs. For 2D non-axisymmetric problems, you will specify only the Rotation-Axis Origin; the axis of rotation is the $z$-direction vector passing through the specified point. (The $z$ direction is normal to the plane of your geometry so that rotation occurs in the plane.) For 2D axisymmetric problems, you will not define the axis: the rotation will always be about the $x$ axis, with the origin at (0,0).



Defining Zone Motion


To define zone motion for a rotating or translating reference frame, select Moving Reference Frame in the Motion Type drop-down list and then set the appropriate parameters in the expanded portion of the panel.

To define zone motion for a sliding mesh, select Moving Mesh in the Motion Type drop-down list and then set the appropriate parameters in the expanded portion of the panel. See Section  11.2 for details.

For problems that include linear, translational motion of the fluid zone, specify the Translational Velocity by setting the X, Y, and Z components. For problems that include rotational motion, specify the rotational Speed under Rotational Velocity. The rotation axis is defined as described above.

See Chapter  10 for details about modeling flows in moving reference frames.



Defining Radiation Parameters


If you are using the DO radiation model, you can specify whether or not the solid material participates in radiation using the Participates in Radiation option. See Section  13.3.15 for details.


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