Heat transfer coefficient for condensation - Pure vapors on solid surface

Input(s)

k: Thermal Conductivity $$(\mathrm{J} / \mathrm{m} \mathrm{s} \mathrm{K})$$

$$\rho$$: Density $$(\mathrm{g} / \mathrm{cc})$$

g: Acceleration Due to Gravity $$\left(\mathrm{m} / \mathrm{s}^{2}\right)$$

$$\mu$$: Viscosity $$(\mathrm{cP})$$

D: Diameter $$(\mathrm{m})$$

$$T_{d}$$: Dew Point Temperature (K)

$$T_{o}$$: Original Temperature (K)

$$\Delta H_{\text {vap }}:$$ Heat of Vaporization $$\left(\mathrm{J} \mathrm{ft}^{2} / \mathrm{s}^{2}\right)$$

Output(s)

$$h_{m}$$: Heat Transfer Coefficient $$(\mathrm{W} / \mathrm{m} \mathrm{K})$$

Formula(s)

$\mathrm{h}_{\mathrm{m}}=0.725 *\left(\frac{\left(\mathrm{k}^{3}\right) *\left(\rho^{2}\right) * \mathrm{~g} * \Delta \mathrm{H}_{\mathrm{vap}}}{\mu * \mathrm{D} *\left(\mathrm{~T}_{\mathrm{d}}-\mathrm{T}_{\mathrm{o}}\right)}\right)^{0.25}$

Reference(s)

Bird, R.B., Stewart, W.E. and Lightfoot, E.N. (2002). Transport Phenomena (Second Ed.). John Wiley & Sons, Chapter: 14, Page: 447.

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