Extraction and evolution of bubbles attributes in a two-phase direct contact evaporator

Q Xiao, Q Gao, J Zhang, J Xu, J Pan, H Wang - International Journal of Heat …, 2018 - Elsevier
Understanding the bubble regimes is a fundamental step toward conducting heat transfer
enhancement. The non-invasive measurement of mixing inside a direct-contact heat transfer …

A novel approach for measuring bubbles uniformity and mixing efficiency in a direct contact heat exchanger

Y Fei, Q Xiao, J Xu, J Pan, S Wang, H Wang, J Huang - Energy, 2015 - Elsevier
This paper presents a straightforward method for assessing the uniformity and mixing time of
bubbles based on uniform design in a direct contact heat exchanger. The evolution of …

Measure of bubble non-uniformity within circular region in a direct-contact heat exchanger

Q Xiao, J Pan, Z Lv, J Xu, H Wang - International Journal of Heat and Mass …, 2017 - Elsevier
The study of bubble swarm distributions in a direct-contact heat exchanger was addressed
both theoretically and experimentally. But recently developed approach based on uniform …

Characterization of bubble population morphology in direct contact heat transfer process under different flow regimes and its influence on heat transfer performance

Q Zhang, Z Li, B Li, J Xu, H Wang - Experimental Thermal and Fluid …, 2023 - Elsevier
In this study, the effect of bubble population morphological characteristics and heat transfer
performance in the direct contact boiling heat transfer process under two different flow …

Quantifying the evolution of flow boiling bubbles by statistical testing and image analysis: toward a general model

Q Xiao, J Xu, H Wang - Scientific Reports, 2016 - nature.com
A new index, the estimate of the error variance, which can be used to quantify the evolution
of the flow patterns when multiphase components or tracers are difficultly distinguishable …

Quantification and correlation analysis of bubble characteristics and heat transfer performance in direct contact heat exchanger

R Shen, Z Fan, J Xu, B Li, H Wang - Applied Thermal Engineering, 2024 - Elsevier
In this work, a combination of morphological processing and watershed algorithm is
proposed to measure bubble size, based on which an improved frame difference method is …

Direct-contact heat exchanger

H Wang, Q Xiao, J Xu - Heat Exchangers-Design, Experiment …, 2017 - books.google.com
Direct-contact heat transfer involves the exchange of heat between two immiscible fluids by
bringing them into contact at different temperatures. There are two basic bubbling regimes in …

A novel method for measuring spatial uniformity of irregular boiling bubbles in a direct contact heat exchanger

Q Wang, J Huang, J Pan, H Wang… - International Journal of …, 2020 - Wiley Online Library
As the binary image fails to reflect the density distribution of the bubble, this paper proposes
an improved new indicator for accurate measurement of spatial uniformity based on gray …

Interplay of fluids mixing and heat transfer in a dual-loop ORC direct contact heat exchanger used for waste heat utilization

Q Xiao, W Luo, J Huang, J Xu… - Proceedings of the …, 2020 - journals.sagepub.com
By bringing two immiscible fluids at different temperatures into a direct contact heat
exchanger (DCHE), bubble swarms are produced in the dual-loop ORC direct contact …

Direct contact evaporation of a single two-phase bubble in a flowing immiscible liquid medium. Part I: two-phase bubble size

HB Mahood, AS Baqir, AD Yousif, AA Khadom… - Heat and Mass …, 2019 - Springer
The evaporation of a single n-pentane drop in another warm flowing liquid (water) medium
has been studied experimentally. A Perspex column with an internal diameter of 10 cm and …