COMSOL 6.4 - Surface Charge Density

	For more information about the Surface Charge Density condition, see Surface Charge Density in the documentation for the Electrostatics interface.

	For 3D components, enter the Edge radius (SI unit: m) for the virtual tube surrounding the edge. The default value is 0.1 m. It is generally assumed that the edge radius is small in comparison to other geometrical measures of the model, such as the edge length and the distances between different edges in the geometry. Enable Compensate for tube volume to allow for a potential gradient across the cross section of the virtual tube. This can be useful for establishing a zero surface charge density condition on the virtual tube periphery.

For 3D components, enter the (SI unit: m) for the virtual tube surrounding the edge. The default value is 0.1 m. It is generally assumed that the edge radius is small in comparison to other geometrical measures of the model, such as the edge length and the distances between different edges in the geometry. Enable to allow for a potential gradient across the cross section of the virtual tube. This can be useful for establishing a zero surface charge density condition on the virtual tube periphery.