Abstract
To assess the distribution of droplet sizes on a flat plate during dropwise condensation, a droplet detection technique has been devised. By integrating an equation for the single droplet heat transfer rate with the droplet size distribution, dropwise condensation heat transfer can be modelled. This chapter provides a thorough introduction to the condensation process. Both boiling and condensation take place throughout the thermodynamic heat transfer process. This article contains information about homogeneous and heterogeneous drop-wise condensation. The drop-wise condensation mechanism has been described with a diagram. The figure shows several contact angles and the resistance provided in dropwise condensation are recognized. The relevance of the condensation process and certain fundamental applications have been discussed recently.
References
- Schmidt E, Schurig W and Sellschopp W. “Experiments on the condensation of water vapor in the form of films and drops”. tech Mech. Thermodyne 1 (1930): 53-63.
- EJ LeFevre and JW Rose. “A theory of heat transfer by dropwise condensation”. in: Chem. Eng. Prog., Amer Inst Chemical Engineers 345 E 47th St, New York, NY 10017 (1966): 86.
- DF Othmer. “The condensation of steam”. Ind. Eng. Chem 21 (1929): 576-583.
- Davies G, Mojtehedi W and Ponter A. “Measurement of contact angles under condensation conditions. The prediction of dropwise film wise transition”. Int. J. Heat Mass Transf 14 (1971): 709-713.
- S Kim and KJ Kim. “Dropwise condensation modelling suitable for superhydrophobic surfaces”. J. Heat Transf 133 (2011): 081502.
- N Fatica and DLV Katz. “Dropwise condensation”. University of Michigan (1949).
- JW Rose. “Dropwise condensation theory and experiment: a review”. Proc. Inst. Mech. Eng. Part J. Power Energy 216 (2002): 115-128.
- JT Han, CX Lin and MA Ebadian. "Condensation heat transfer and pressure drop characteristics of R-134a in an annular helical pipe". International Communications in Heat and Mass Transfer 32 (2005): 1307-1316.