between adjacent leaf nodes. By default, the current balancing mode also respects the same condition on nodes connected by one vertice.</p>
<p>Since this function, which is based on the Generator.PyTree.octree() function, is primarily used to automatically generate Cartesian grids around immersed boundaries, a final expansion of the lowest level leaf nodes is performed so that the minimum spacing imposed near the wall is sufficiently propagated in the wall normal direction. Local refinement zones stored in 