...
| LaTeX Math Block |
|---|
|
U = \frac{\lambda_{ann}}{d_h} \, {\rm Nu}_h{ann} |
where
...
The Nusselt number (Nu) correlations are:
| Stagnant fluid | Natural Convection | Forced Convection |
|---|
| OEIS sequence A282581 |
| J. DIRKER & J. P. MEYER |
| LaTeX Math Block |
|---|
| {\rm Nu}=3.6568 |
|
| LaTeX Math Block |
|---|
| {\rm Nu} = \frac{2 \cdot \epsilon({\rm Ra})}{\ln (r_{out}/r_{in})} |
|
| LaTeX Math Block |
|---|
| {\rm Nu}= c \cdot \mbox{Re}_D^p \cdot \mbox{Pr}^{0.4}\cdot \left( \frac{\mu}{\mu_w} \right)^{0.14} |
|
| where | where |
|
| | LaTeX Math Inline |
|---|
| body | --uriencoded-- \mbox%7BRe%7D |
|---|
|
| Reynolds number |
| LaTeX Math Inline |
|---|
| body | --uriencoded--\epsilon(%7B\rm Ra%7D) |
|---|
|
| Natural Convection Heat Transfer Multiplier | | LaTeX Math Inline |
|---|
| body | --uriencoded-- \mbox%7BPr%7D = \nu / a |
|---|
|
| |
| LaTeX Math Inline |
|---|
| body | --uriencoded--%7B\rm Ra%7D |
|---|
|
| Rayleigh number | |
p | |
|
| | thermal diffusivity |
|
| | LaTeX Math Inline |
|---|
| body | --uriencoded--r_%7Bout%7D |
|---|
|
| inner radius of outer pipe |
|
| | LaTeX Math Inline |
|---|
| body | --uriencoded--r_%7Bin%7D |
|---|
|
| outer radius of inner pipe |
|
| |
a | \zeta = r_%7Bout%7D/r_%7Bin%7D |
|
|
Prandtl number |
|
|
|
| LaTeX Math Inline |
|---|
| body | p = 1.013 \cdot\exp \left[ -0.067 \cdot |
|---|
|
|
a |
|
| | LaTeX Math Inline |
|---|
| body | --uriencoded--\displaystyle c = \frac%7B0.03 \, |
|---|
|
|
a%5e%7B1| \zeta%5e%7B1.86%7D%7D%7B0.063 \, |
|
|
a%5e3 a%5e2 a
See also
...
Physics / Thermodynamics / Heat Transfer / Heat Transfer Coefficient (HTC) / Heat Transfer Coefficient (HTC) @model
...
