CORRELATION OF CONVECTIVE HEAT TRANSFER COEFFICIENT FOR TWO-PHASE LIQUID-VAPOUR FLOW

1970 ◽  
Author(s):  
J. M. Chawla
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Convective Heat Transfer Coefficient ◽  
Two Phase ◽  
Phase Liquid

scholarly journals Heat transfer modelling of two-phase bubbles swarm condensing in three - phase direct - contact condenser

2016 ◽  
Vol 20 (1) ◽  
pp. 143-153 ◽  
Author(s):  
Hameed Mahood ◽  
Adel Sharif ◽  
Sami Al-Ailbi ◽  
Ali Hossini ◽  
Rex Thorpe
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Bubble Size ◽  
Direct Contact ◽  
Convective Heat Transfer Coefficient ◽  
Two Phase ◽  
Three Phase

An analytical model for the convective heat transfer coefficient and the two-phase bubble size of a three-phase direct contact heat exchanger was developed. Until the present, there has only been a theoretical model available that deals with a single two-phase bubble and a bubble train condensation in an immiscible liquid. However, to understand the actual heat transfer process within the three-phase direct contact condenser, characteristic models are required. A quasi - steady energy equation in a spherical coordinate system with a potential flow assumption and a cell model configuration has been simplified and solved analytically. The convective heat transfer in terms of Nu number has been derived, and it was found to be a function to Pe number and a system void fraction. In addition, the two-phase bubble size relates to the system void fraction and has been developed by solving a simple energy balance equation and using the derived convective heat transfer coefficient expression. Furthermore, the model correlates well with previous experimental data and theoretical results.

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