Question: Two long, concentric cylinders have an inner radius R _ ( 1 ) and outer radius R _ ( 2 ) . Determine the shape

Two long, concentric cylinders have an inner radius R_(1) and outer radius R_(2). Determine the
shape factors F_(1-2),F_(2-2), and F_(2-2) for this configuration. Would the answers change if the inner
cylinder were eccentric? If the inner and outer cylinders have surfaces with emissivities \epsi _(1)
and \epsi _(2) and temperatures T_(1) and T_(2), respectively, develop an expression for the radiant heat
transfer from Surface 1 to Surface 2, i.e., q_(1-2) in terms of R_(1),R_(2),\epsi _(1),\epsi _(2),T_(1), and T_(2). Evaluate
your expression in the limit as R_(2)R_(1) and comment on your results.

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