Point Heat Source on Axis This node, available for 2D axisymmetric components, models a heat source (or sink) that is so small that it can be considered to have no spatial extension. The settings are the same as for the Point Heat Source node. Location in User Interface Context menus Heat Transfer in Solids>Points>Point Heat Source on AxisHeat Transfer in Fluids>Points>Point Heat Source on Axis Ribbon Physics Tab with Heat Transfer in Solids or Heat Transfer in Fluids selected:Points>Point Heat Source on Axis