Credit: Van de Water, et al.
Figure 1. Top panel (a), left to right, shows the five hands and finger positions evaluated with finger spreads of 0, 5, 10, 15 and 20◦. The angle of each finger is defined as the angle relative to the 0◦ position. Middle right, panel (b), shows the schematic view of the wind tunnel experimental setup involving two force sensors in tandem configuration. Lower left, panel (c) shows the computational domain in which force moments are computed with respect to the point P.