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| LaTeX Math Block | ||||
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\frac{1}{ dr_{ti} \, U} = \frac{1}{dr_{ti} \, U_{ti}} + \frac{1}{\lambda_t} \, \ln \frac{dr_t}{dr_{ti}} +
+ \frac{1}{\lambda_{a, \rm eff}} \ln \frac{dr_{ci}}{dr_t} +
\frac{1}{\lambda_c} \ln \frac{dr_c}{dr_{ci}} + \frac{1}{\lambda_{cem}} \ln \frac{dr_w}{dr_c} |
where
| outer radius of tubing (with outer radius
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| inner diameter radius of the tubing (with inner radius | |||||||||||||
| r_%7Bti%7D)
| tubing wall thickness | ||||||||||||
| outer radius of casing (with outer radius | |||||||||||||
| r_c | )
| inner diameter radius of the casing (with inner radius body | --uriencoded--r_%7Bci%7D) | ||||||||||
| casing wall thickness | |||||||||||||
| thermal conductivity of tubing material | |||||||||||||
| thermal conductivity of fluid moving through the tubing | |||||||||||||
| effective thermal conductivity of the annulus | |||||||||||||
| Natural Convection Heat Transfer Multiplier | |||||||||||||
| thermal conductivity of fluid in the annulus | |||||||||||||
| heat transfer coefficient (HTC) |
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