Fluid mechanics of fibre suspensions related to papermaking - DiVA

Fibre fraction, n/ N to t
Fibre fraction, n/ N tot
0.25
0.2
0.15
0.1
0.05
a)
0
0 30 60 90
Fibre orientation
0.25
0.2
0.15
0.1
0.05
c)
0
0 30 60 90
Fibre orientation
4. SUMMARY OF THE PAPERS 31
Fibre fraction, n/ N tot
Fibre fraction, n/ N tot
0.25
0.2
0.15
0.1
0.05
b)
0
0 30 60 90
Fibre orientation
0.25
0. 2
0.15
0. 1
0.05
d)
0
0 30 60 90
Fibre orientation
Figure 4.6. The fibre orientation distributions for r = 10
and concentration nL 3 =0.009 for different wall parallel plans,
a) z = 1 ± 1 mm b) z = 3 ± 1 mm, c) z = 6 ± 1 mm and d)
z = 9 ± 1 mm.
Figure 4.7. Ultrasonic velocity measurement by determining
the Doppler shift from the wavelet transform.