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In Natural Fluid Convection becomes dependant on Rayleigh number
and Prandtl number : | LaTeX Math Inline |
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| body | --uriencoded--\mbox%7BNu%7D = f (\mbox%7BRa%7D, \mbox%7BPr%7D) |
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. Churchill
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| LaTeX Math Inline |
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| body | --uriencoded--\mbox%7BRa%7D \leq 10%5e8 |
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| LaTeX Math Block |
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| \mbox{Nu}= \left[ 0.825 + \frac{0.387 \, \mbox{Ra}^{1/6}}{ \left[ 1+ (0.492/\mbox{Pr})^{9/16} \right]^{8/27}} \right]^2 |
 Image Added
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| Churchill and Chu |
| LaTeX Math Block |
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| \mbox{Nu}= 0.68 + \frac{0.663 \, \mbox{Ra}^{1/4}}{ \left[ 1+ (0.492/\mbox{Pr})^{9/16} \right]^{4/9}} |
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Laminar flows
| LaTeX Math Inline |
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| body | --uriencoded--\mbox%7BRa%7D \leq 10%5e9 |
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Churchill and Chu correlation which works with :
Forced Convection
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In Forced Fluid Convection the Nusselt number becomes dependant on Reynolds number
and Prandtl number :
| LaTeX Math Inline |
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| body | --uriencoded--\mbox%7BNu%7D = f (\mbox%7BRe%7D, \mbox%7BPr%7D) |
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