Strona 2_redak - Instytut Agrofizyki im. Bohdana Dobrzańskiego ...

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Table 16.31. Mean values (±St. Dev.) of the pressure ratio k s and k 3 and the angle of internal friction
ϕ of rape seeds variety Licosmos at the moisture content of 6-15%
Material
Rape seeds
Licosmos
Moisture
content (%)
6
9
12
15
k s
0.46 ± 0.02
0.28 ± 0.04
0.27 ± 0.02
0.24 ± 0.02
k 3 = 1.1(1–sinϕ)
0.64 ± 0.02
0.54 ± 0.01
0.52 ± 0.01
0.47 ± 0.01
Angle of int.
friction
ϕ (deg)
24.7 ± 0.5
30.6 ± 0.4
31.7 ± 0.7
34.8 ± 0.7
Table 16.32. Mean values (±St. Dev.) of the pressure ratio k s and k 3 and the angle of internal
friction ϕ of selected seeds
Material
Amaranth. Rawa
White mustard.
Borowska
Pea. Piast
Buckwheat. Kora
Lentils. Tina
Soybeans. Aldana
Moisture
content (%)
8
9
10
10
8
8
k s
0.62 ± 0.02
0.43 ± 0.01
0.53 ± 0.01
0.59 ± 0.02
0.56 ± 0.01
0.37 ± 0.02
k 3 = 1.1(1–sinϕ)
0.70 ± 0.02
0.64 ± 0.01
0.59 ± 0.01
0.68 ± 0.02
0.82 ± 0.02
0.55 ± 0.01
Angle of int.
friction
ϕ (deg)
21.3 ± 0.8
24.7 ± 0.4
27.3 ± 0.6
22.0 ± 0.8
14.3 ± 0.4
30.1 ± 0.9
Table 16.33. Mean values (±St. Dev.) of the pressure ratio k s and k 3 and the angle of internal
friction ϕ of selected food powders
Material
Flour
Coarse flour
Semolina
Wheat groats
Pearl barley groats
Oat meal
Icing sugar
Table sugar
Potato starch
Powder milk
Granulated milk
Table salt
Corn meal
Soybean meal
Moisture
content (%)
12.7
13.4
12.7
13.6
13.2
11.0
0.4
0.4
18.2
4.4
7.9
0.2
11.7
8.5
k s
0.26 ± 0.01
0.37 ± 0.02
0.38 ± 0.02
0.37 ± 0.02
0.36 ± 0.02
0.40 ± 0.01
0.31 ± 0.02
0.47 ± 0.02
0.47 ± 0.02
0.40 ± 0.02
0.34 ± 0.02
0.31 ± 0.01
0.45 ± 0.02
0.53 ± 0.02
k 3 = 1.1(1–sinϕ)
0.56 ± 0.02
0.62 ± 0.02
0.51 ± 0.02
0.59 ± 0.02
0.55 ± 0.02
0.72 ± 0.02
0.52 ± 0.02
0.53 ± 0.04
0.44 ± 0.02
0.48 ± 0.03
0.50 ± 0.03
0.50 ± 0.03
0.55 ± 0.02
0.51 ± 0.03
Angle of int.
friction
ϕ (deg)
29.2 ± 1.0
26.1 ± 0.8
32.4 ± 1.0
27.8 ± 1.0
30.0 ± 1.0
20.0 ± 1.0
31.7 ± 1.0
31.4 ± 2.0
37.0 ± 1.0
34.3 ± 1.5
33.2 ± 1.5
32.8 ± 1.5
30.2 ± 1.1
32.2 ± 1.6