A Ph.D. dissertation at the Engineering Technical College in Najaf, affiliated with Al-Furat Al-Awsat Technical University, examined an experimental and theoretical investigation into the evaporation behaviour of biphasic hydrocarbon droplets in an immiscible surrounding fluid.
The dissertation, presented by doctoral candidate Ahmed Razzaq Kareem, aimed to provide a detailed analysis of the physical behaviour of this phenomenon.
The study addressed the influence of hydrostatic pressure in the liquid column and the temperature difference between the two phases on evaporation dynamics and heat transfer mechanisms, employing both experimental approaches and theoretical modelling.
The findings highlighted the complexity of this phenomenon and its critical role in direct-contact heat exchanger (DCHE) systems, which rely on the interaction between immiscible fluids.
It was noted that DCHEs are distinguished by their ability to transfer substantial amounts of heat compared to conventional heat exchangers, due to the direct interaction between different phases—making them particularly effective in applications that require rapid and efficient thermal exchange.
Furthermore, the dissertation succeeded in developing four empirical equations that significantly enhanced the accuracy of evaporation predictions, supported by a comprehensive statistical analysis of the experimental data.
The study recommended the adoption of advanced thermal imaging techniques using an infrared camera (FLIR E30BX) to monitor evaporation conditions, which opens new avenues for optimising heat exchanger performance in practical applications.
Notably, the outcomes and concepts presented in this research have been published in peer-reviewed journals indexed in Clarivate and Scopus, reflecting the scientific and practical relevance of the work in the field of thermal systems and heat exchanger technologies.
Written and edited by Nihad Al-Rubaie
Director of the Media and Government Communication Department
