The effective velocity vector can now be determined using geometrical relations implied in Figure 2.5. [With reference to Figure 2.5, note thatarc acb falls in the - plane; arc a'cb' is in the - plane; the axis is the probe axis; is the flow direction; and is the position of any point on the spherical probe surface with respect to the flow direction. ]
Figure 2.5: Vector Decomposition of Total Velocity .
can now be determined using geometrical relations implied in Figure 2.5. 
- 
plane; arc a'cb' is in the 
plane; the 
is the flow direction; and 
is the position of any point on the spherical probe surface with respect to the flow direction. ] 
. 
