𝑅1 = 1.25𝑥10−2 𝑅2 = 𝑅1 + 12.5𝑥10−3 𝑘 = 204 ℎ = 60 𝑒0 = 5𝑥10−3 𝑇𝑤 = 200 𝑇𝑎 = 20 𝑒(𝑟) = 𝑒0 (1 − 𝑒𝑝(𝑟) = 𝑟 − 𝑅1 ) 𝑅2 − 𝑅1 𝑒0 𝑟 − 𝑅1 (1 − ) 2 𝑅2 − 𝑅1 2 𝑑 𝑑 − (𝑞𝑟 ∗ 𝑟 ∗ 𝑒(𝑟)) − 2√1 + ( (𝑒(𝑟))) ∗ ℎ(𝑇 − 𝑇𝑎) == 0 𝑑𝑟 𝑑𝑟 𝑞𝑟 = −𝑘 𝑑𝑇 𝑑𝑟 𝑇[𝑅1] = 0 𝑇 ′ [0.99999𝑅2] = 0 𝑇 = 𝐹𝑖𝑟𝑠𝑡[𝑇./𝑁𝐷𝑆𝑜𝑙𝑣𝑒[{ }, 𝑇, {𝑟, 𝑅1,0.99999 ∗ 𝑅2}]