Essay about Reynolds Number and Hf

Submitted By alalea1992
Words: 2573
Pages: 11

Laminar and Turbulent flow in a pipe (Reynolds Experiment)
Short Report

Alalea Kia
22/03/2011

Small Pipe Test:
Table 1: Results of the small pipe test.

Small Pipe
Manometer
head
A
B
(mm) (mm)
737
87
743
107
753
127
764
152
775
177
789
207
798
227
810
254
820
276
831
303
843
327
850
346
861
369
872
385
881
412
891
438
898
455
910
481
916
498
929
524
936
538
946
563
954
578
964
602
971
622
983
645
989
659
998
678
1005
691
1014
712
1022
731
1028
745
1030
761
1042
777
1049
793
1056
809
1063
824

hf
A-B
(mm)
650
636
626
612
598
582
571
556
544
528
516
504
492
487
469
453
443
429
418
405
398
383
376
362
349
338
330
320
314
302
291
283
269
265
256
247
239

Rotameter
Scale
Flow rate
Q
(mm)
(mm3/s)
159
20238.70
157
20008.77
155
19778.84
153
19548.91
151
19318.98
149
19089.05
147
18859.12
145
18629.19
143
18399.26
141
18169.33
139
17939.40
137
17709.47
135
17479.54
133
17249.61
131
17019.68
129
16789.75
127
16559.82
125
16329.89
123
16099.96
121
15870.03
119
15640.10
117
15410.17
115
15180.24
113
14950.31
111
14720.38
109
14490.45
107
14260.52
105
14030.59
103
13800.66
101
13570.73
99
13340.80
97
13110.87
95
12880.94
93
12651.01
91
12421.08
89
12191.15
87
11961.22

Velocity
V=Q/A
(mm/s)
1095.49
1083.05
1070.60
1058.15
1045.71
1033.26
1020.82
1008.37
995.93
983.48
971.03
958.59
946.14
933.70
921.25
908.81
896.36
883.91
871.47
859.02
846.58
834.13
821.68
809.24
796.79
784.35
771.90
759.46
747.01
734.56
722.12
709.67
697.23
684.78
672.34
659.89
647.44

Log values
Log Log
V
hf
3.04 2.81
3.03 2.80
3.03 2.80
3.02 2.79
3.02 2.78
3.01 2.76
3.01 2.76
3.00 2.75
3.00 2.74
2.99 2.72
2.99 2.71
2.98 2.70
2.98 2.69
2.97 2.69
2.96 2.67
2.96 2.66
2.95 2.65
2.95 2.63
2.94 2.62
2.93 2.61
2.93 2.60
2.92 2.58
2.91 2.58
2.91 2.56
2.90 2.54
2.89 2.53
2.89 2.52
2.88 2.51
2.87 2.50
2.87 2.48
2.86 2.46
2.85 2.45
2.84 2.43
2.84 2.42
2.83 2.41
2.82 2.39
2.81 2.38

Reynolds Friction
Number
factor Temperature
Re=Vd/v
5392.69
5331.42
5270.15
5208.89
5147.62
5086.36
5025.09
4963.82
4902.56
4841.29
4780.03
4718.76
4657.50
4596.23
4534.96
4473.70
4412.43
4351.17
4289.90
4228.63
4167.37
4106.10
4044.84
3983.57
3922.31
3861.04
3799.77
3738.51
3677.24
3615.98
3554.71
3493.45
3432.18
3370.91
3309.65
3248.38
3187.12

o

f
0.0086
0.0086
0.0087
0.0087
0.0087
0.0086
0.0087
0.0087
0.0087
0.0087
0.0087
0.0087
0.0087
0.0089
0.0088
0.0087
0.0087
0.0087
0.0087
0.0087
0.0088
0.0087
0.0088
0.0088
0.0087
0.0087
0.0088
0.0088
0.0089
0.0089
0.0089
0.0089
0.0088
0.0090
0.0090
0.0090
0.0090

C
20

20

20

20

2

1069
1076
1091
1088
1095
1100
1105
1110
1115
1121
1127
1131
1138
1142
1148
1155
1158
1161
1165
1170
1174
1179
1182
1186
1189
1193
1197
1201
1203
1205
1209
1212
1214
1216
1218
1221
1222
1222
1224
1226
1228
1230
1231

837
856
865
881
897
909
922
939
950
960
981
994
1008
1022
1035
1052
1061
1071
1080
1092
1101
1109
1114
1121
1126
1133
1139
1146
1149
1154
1160
1166
1169
1173
1176
1181
1183
1186
1188
1192
1196
1199
1202

232
220
226
207
198
191
183
171
165
161
146
137
130
120
113
103
97
90
85
78
73
70
68
65
63
60
58
55
54
51
49
46
45
43
42
40
39
36
36
34
32
31
29

85
83
81
79
77
75
73
71
69
67
65
63
61
59
57
55
53
51
49
47
45
43
41
39
37
35
33
31
29
27
25
23
21
19
17
15
13
11
9
7
5
3
1

11731.29
11501.36
11271.43
11041.50
10811.57
10581.64
10351.71
10121.78
9891.85
9661.92
9431.99
9202.06
8972.13
8742.20
8512.27
8282.34
8052.41
7822.48
7592.55
7362.62
7132.69
6902.76
6672.83
6442.90
6212.97
5983.04