AME 331, Spring 2008
Problem set #6
Assigned: April 4, 2008
Due: April 11, 2008, 4:30 pm in OHE 430J
Concept |
Problem (Holman) |
Points |
Answer |
|
Natural convection boundary layers |
7-7 |
10 |
|
|
Vertical cylinder |
7-14 |
15 |
|
|
Vertical plate, constant temperature |
7-18 |
15 |
1900 W |
|
Vertical plate, constant heat flux |
7-21 |
15 |
Avg. h = 264 W/m2; Avg. Tw = 18.8ūC |
|
Horizontal cylinder |
7-34 |
15 |
|
|
Vertical enclosure |
7-80 |
15 |
2060 W |
|
Horizontal enclosure |
7-81 |
15 |
2550 W |
Note on problem 7-7: use Eq. 7-20 which is only valid for laminar flow to compute boundary layer thickness, even though Gr is somewhat larger than the limit for laminar flow.