This option is available for volume elements. First, the node centered sector volume is calculated for each node in the mesh. Then to calculate the expansion factor, the node centered volume is compared to the volumes around the adjacent nodes to find the largest factor. For the element quality display, for each element, the corresponding nodes will be checked and the maximum of all contributing node mesh expansion factors will be used. If there is no node contributing to the element’s mesh expansion factor, then the value will be 1.