普兰德数
Pr
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
250
260
270
280
290
300
310
320
330
340
350
360
370
0.6082
1.2262
2.3346
4.2474
7.3766
12.34
19.923
3.609 × 10 -2
2.456 × 10 -3
1.867
7.349 × 10 -2
25.4
1
1达因/厘米2 (dyn/cm 2 )=1巴利(barye)=1微巴( μ bar)=10 -6巴(bar)
1毫米水柱(mmH2O)(4℃)=1公斤/米2 (kg/m 2 )
1毫米汞柱(mmHg)(0℃)=1乇(Torr)
25.4
1
3.456 × 10 2
13.61
9.798
9.798 × 10 -5
9.991 × 10 -5
1.421 × 10 -3
9.67 × 10 -5
7.349 × 10 -2
2.893 × 10 -3
1
3.937 × 10 -2
2.489 × 10 2
2.489 × 10 -3
2.538 × 10 -3
4.949
4.070
5.229
5.485
5.736
6.071
6.573
7.243
8.164
9.504
13.984
40.319
55.13
57.45
59.89
61.76
63.38
64.78
65.94
66.76
67.45
67.98
68.04
68.27
68.50
68.50
68.27
68.38
68.27
67.92
0.102
2.39×10 -4
9.478×10 -4
0.7376
10 3
1
1.36
1.341
102
0.239
0.9478
737.6
735.5
0.7355
1
0.9863
75
0.1757
0.6972
542.5
745.7
0.7457
1.014
1
76.04
0.1781
0.7068
550
9.807
9.807×10 -3
10.76
3.875×10 4
2.778
2.778×10 -4
1
2.99×10 -3
10.76
929
9.29×10 -2
3.346×10 2
1
3.6×10 3
0.258
2.58×10 -5
9.29×10 -2
2.78×10 -4
1
1厘沲(cSt)=10 -2沲(St)
沲是斯托克斯(Stokes)的习惯称呼。
1
10 -5
1.02 × 10 -5
1.45 × 10 -4
9.869 × 10 -6
7.501 × 10 -3
2.953 × 10 -4
0.1021
4.018 × 10 -3
10 5
1
1.020
14.5
0.9869
750.1
29.53
1.021 × 10 4
401.8
9.807 × 10 4
0.9807
1671.37
1761.39
1892.43
4.212
4.191
4.183
4.174
4.174
4.174
4.178
4.178
4.195
4.208
4.220
4.233
4.250
4.266
4.287
4.312
4.346
4.379
4.417
4.460
4.505
4.555
4.614
4.681
4.756
4.844
67.45
66.99
66.29
65.48
64.55
63.73
62.80
61.76
60.48
59.96
57.45
55.82
53.96
52.34
50.59
48.73
45.71
43.03
39.54
33.73
179.21
130.77
100.50
80.07
65.60
54.94
46.88
40.61
35.65
31.65
11.9
12.7
13.3
14.1
15.4
15.9
340
9.5
9.9
10.4
10.9
11.4
11.6
12.7
13.3
14.1
15.2
350
8.9
9.3
9.8
10.3
10.8
11.4
11.9
12.5
13.3
13.9
360
8.8
9.2
9.6
10.0
10.5
11.0
11.6
12.2
12.8
13.5
370
8.6
503.67
546.38
589.08
632.20
675.33
719.297763.25
807.63
852.43
897.65
943.70
990.18
1037.49
1085.64
1135.04
1185.28
1236.28
1289.95
1344.80
1402.16
1462.03
1526.10
1594.75
° R
5/9°R
K-273.15②
9/5K-459.67
9/5K
K
水的物理性质
温度
(℃)饱和蒸汽压(Fra bibliotekPa)密度
(kg/m 3 )
焓
(kJ/kg)
比热
kJ/(kg •℃)
导热系数λ× 10 2 (W/ m ·℃)
粘度
μ× 10 5 (Pa • a)
体积膨胀系数β× 10 4 (1/℃)
表面张力σ× 10 3 (N/m)
8.8
9.3
9.7
10.2
10.6
11.0
11.8
12.2
13.1
380
8.2
8.5
8.8
9.3
9.6
10.2
10.6
11.0
11.6
12.2
390
7.9
8.1
8.6
8.8
9.2
9.6
10.0
10.6
11.0
11.6
400
7.7
8.0
8.3
8.7
8.9
9.4
9.7
10.5
10.7
11.0
410
7.5
1.034 × 10 4
407.2
1.333 × 10 2
1.333 × 10 -3
1.36 × 10 -3
1.934 × 10 -2
1.316 × 10 -3
1
3.937 × 10 -2
13.61
0.5357
3.386 × 10 3
3.386 × 10 -2
3.453 × 10 -2
0.4912
3.342 × 10 -2
7.8
8.1
8.7
8.4
9.1
9.5
9.9
10.4
10.7
420
7.3
7.5
7.9
8.1
8.4
8.7
9.1
10.1
10.2
10.4
430
7.0
7.4
7.6
7.9
8.1
8.5
8.8
9.1
9.5
9.9
440
6.8
7.0
7.3
7.5
7.9
8.1
8.5
8.7
9.1
9.5
450
6.5
6.8
6.9
7.2
7.5
7.8
28.38
25.89
23.73
21.77
20.10
18.63
17.36
16.28
15.30
14.42
13.63
13.04
12.46
11.97
11.47
10.98
1.333×10 -2
1.315×10 -2
1
2.342×10 -3
9.295×10 -3
7.233
4187
4.187
5.692
5.614
426.9
1
3.968
3087
1055
1.055
1.434
1.415
107.6
0.252
1
778.2
1.356
1.356×10 -3