Agriculture Reference
In-Depth Information
15
12
9
6
3
0
0
5
10
15
20
25
Vertical travel from rest (m)
Figure 16.2a.
Velocities of drops falling from different heights from rest to terminal velocity.
Incident drop diameters 2.2 mm
(-----),
2.9 mm
(—
.
—
.
—),
3.4 mm
(— — —),
4.9 mm
(---).
The
velocity values were obained by numerically solving the motion equation resulting from the
balance of forces affecting a spherical drop falling in still air.
10
8
6
5
2
0
0
1
2
3
4
Incident drop diameter (mm)
Figure 16.2b. Relationship between incident drop diameter and terminal velocity as desc-
____
ribed by three formulae (Englemann, 1968:
-----
; Ulbrich, 1983:
---
; Madden, 1992:
— — —).
