An adobe wall on a house in New Mexico is exposed to the elements. An adobe wall
ID: 2086771 • Letter: A
Question
An adobe wall on a house in New Mexico is exposed to the elements. An adobe wall is made of mud and concrete, has a very high mass density and is about 1 foot thick....it has a very high Biot number. Which type of transient heat conduction model for semi-infinite solids (there are 4 in the text) would you use to model heat flow in this wall on a night with really high winds outside?
Case 4: Energy Pulse at the Surface
Case 1: Specified Constant Surface Temperature
Case 3: Convection on the surface
Case 2: A Specified Constant Heat Flux
A.Case 4: Energy Pulse at the Surface
B.Case 1: Specified Constant Surface Temperature
C.Case 3: Convection on the surface
D.Case 2: A Specified Constant Heat Flux
Explanation / Answer
Case 3 CONVECTION ON THE SURFACE why because the biot number high so case1 and case 2 are not possible at this condition. And the high winds increase the rate of heat transfer from wall to atmosphere or atmosphere to wall it depends on temperature difference. And also it is a forced convection means the air outside blow with high speed that's why CASE3 IS correct for analysis.
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