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Unformatted text preview: fixed temperatures
E = 30e6
Kxx = 1
ρ = 0.21
αx = .21
νxy = .27 Geometric Properties
r1 = 1
r2 = 4
σ = 1.19e-11 Loading
Interior of exterior cylinder ε = 1
Exterior of interior cylinder ε =1
All other surfaces ε = 0
Exterior of Exterior cylinder T = 1000
Interior of Interior cylinder T = 100 Analysis Assumptions and Modeling Notes
The cylinders are assumed to be infinite length, with no end effects, and with uniform surface characteristics. As
such, any point on one surface should have the same view factor and characteristics as any other point on the
F(11) = 0 As a circle, it cannot see itself from any part of its surface.
F(12) = 1 Consequence of no radiation to space
F(21) = (A1/A2)F(12) Basic rule of view factors
F(21) = (r1/r2)F(12)
F(21) = r1/r2
F(22) = 1 - (r1/r2) Consequence of no radiation to space
As a check on the system, the heat flux at two points are compared to that expected by σ(T14 - T24) Results Comparison
Target ANSYS Ratio F(...
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This note was uploaded on 12/09/2010 for the course DEPARTMENT E301 taught by Professor Kulasinghe during the Spring '09 term at University of Peradeniya.
- Spring '09
- The Land