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Hand experiencing convection heat transfer with moving air and water.xls
 
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Description:

KNOWN: Hand experiencing convection heat transfer with moving air and water.

FIND: Determine which condition feels colder. Contrast these results with a heat loss of 30W/m2 under normal room conditions.

ASSUMPTIONS: 1) Temperature is uniform over the hand's surface

2) Convection coefficient is uniform over the hand

3) Negligible radiation exchange between hand and surroundings in the case of air flow

ANALYSIS: The hand will feel colder for the conditions which results in the larger heat loss. The Heat loss can be determined from Newton's law of cooling.

Calculation Reference
Fundamentals of Heat and Mass Transfer - Frank P. Incropera

Submitted By:
John Doyle (JohnDoyle[Admin])
Submitted On:
29 Jan 2008
File Size:
49.50Kb
Downloads:
93
File Version:
1.0
Rating:
Total Votes:2
Comments: 2
Helen_Miller 13 years ago
Its a very simple calculation. Good for novices to the subject. I think it should have been posted in the convection folder not the combined folder.
Helen_Miller 13 years ago
Its a very simple calculation. Good for novices to the subject. I think it should have been posted in the convection folder not the combined folder.

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