Assigning heat conduction boundary conditions

After defining a heat conduction boundary condition as a set, you can assign the set to the selected objects by clicking button of the dialog. You can scroll the heat conduction boundary condition sets, and make any of them the currently active set, which is always applied for assignment.

> Selecting objects to assign heat conduction boundary conditions

The assignable object types are determined by the type of boundary conditions, as shown in the previous table. Whenever the popup menu item in the dialog is altered, some selection tools are enabled and others disabled accordingly. You can switch to one of the enabled selection tools, and assign the currently active boundary condition to the objects of the relevant type.

> Replacing previous assignment

An object can be assigned with only one heat boundary condition set. If you assign a new set to the object which has already been assigned with other set, the old set will be replaced by the new one. But, it should be noted that one object may encompasses other objects of different type, and accordingly multiple sets may actually be assigned to a single object. For example, a temperature may be specified along a curve, while the other temperature is assigned to a node which is on the same curve. Thus, the node is assigned with two condition sets which are in conflict. In this case, the nodal assignment overrides other assignments such that the temperature of the curve is not applied to that node. In general, if one object encompasses the other object, and both objects are assigned with two different heat boundary condition sets, the assignment on the encompassed object always overrides the other assignment.

> Representation of heat conduction boundary condition assignment

The objects assigned with heat conduction boundary conditions are distinguished from others by small square marks or by color. The nodes assigned with the current set are marked by dark red squares. The nodes assigned with other than the current set are marked by bright red squares. The curves, surface meshes, or volume meshes assigned with the current set are drawn in dark red color, and those assigned with other than the current set are drawn in bright red color.