Innovations and Inventions in Two-Phase Flow and Heat Transfer

A special issue of Inventions (ISSN 2411-5134). This special issue belongs to the section "Inventions and Innovation in Energy and Thermal/Fluidic Science".

Deadline for manuscript submissions: 31 January 2026 | Viewed by 778

Special Issue Editor


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Guest Editor
Department of System and Naval Mechatronic Engineering, National Cheng Kung University, No. 1, University Road, Tainan City 701, Taiwan
Interests: heat transfer enhancement; gas turbine blade cooling; electronic cooling; thermosyphon and heat pipe; heat convection of reciprocating and pulsating flows; cooling of electric motor
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Special Issue Information

Dear Colleagues,

A flow of gas/vapor and liquid occurs in various forms, such as boiling and condensation as a result of heat transfer, dispersed two-phase flows where one phase is present in the form of droplets, or bubbles in another phase of fluid, and cavitation when local static pressure is close to the vapor pressure of liquid. Its applications constitute a prolific research field ranging from propeller propulsion, water hammer in piping networks, air–water flows in the drainage of buildings, petroleum transportation, and cooling of electronic chipsets/components/systems using heat pipes and thermosyphons. The primary performance metrics of interest vary with applications, including flow instabilities, hydro forces, flow resistances, and heat transfer rates pertinent to these two-phase flows. This Special Issue is dedicated to showcasing innovations and inventions as well as new findings that elucidate the flow and heat transfer physics underlying the two-phase flow phenomena through the lens of theoretical, numerical, and experimental studies for leveraging the engineering achievements. Potential topics include, but are not limited to, hydrodynamics, piping engineering, rotating machineries, steam/refrigerant plants, reaction–diffusion phenomena, two-phase thermal flow in electronic systems, fundamentals of cavitation, evaporation, boiling, and condensation, and advanced research methods that are prerequisites of scientific explorations of two-phase flows.

Prof. Dr. Shyy Woei Chang
Guest Editor

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Keywords

  • multiphase flow
  • phase change cooling in electric systems
  • condensation
  • boiling
  • reaction–diffusion phenomena
  • heat pipe
  • thermosyphon
  • cavitation
  • air–water flow in drainage
  • steam/refrigerant plants
  • petroleum transportation

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Published Papers (1 paper)

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Research

20 pages, 9150 KB  
Article
Heat Transfer Enhancement and Flow Resistance Characteristics in a Tube with Alternating Corrugated-Smooth Segments
by Junwen Cheng, Jiahao Zhu, Xin Wen, Haodong Yu, Wei Lin, Zuqiang Xin and Jiuyang Yu
Inventions 2026, 11(1), 5; https://doi.org/10.3390/inventions11010005 - 5 Jan 2026
Viewed by 307
Abstract
To mitigate the inherent high flow resistance of conventional corrugated tubes, a novel design with alternating clockwise/counterclockwise corrugated segments separated by smooth sections is proposed. A 3D numerical model was developed to systematically evaluate the thermal-hydraulic performance of the novel tube against smooth [...] Read more.
To mitigate the inherent high flow resistance of conventional corrugated tubes, a novel design with alternating clockwise/counterclockwise corrugated segments separated by smooth sections is proposed. A 3D numerical model was developed to systematically evaluate the thermal-hydraulic performance of the novel tube against smooth and conventional corrugated tubes, with simulations conducted at Reynolds number (Re) = 9952–35,827. Results show both corrugated configurations enhanced heat transfer significantly relative to the smooth tube: the conventional tube had the highest Nusselt number (Nu) (1.76–1.79 times that of the smooth tube), while the novel tube achieved Nu = 1.61–1.65 times that of the smooth tube. Notably, the novel tube reduced flow resistance substantially—at Re = 35,827, its friction factor (f) was only 65.2% of the conventional tube’s. Parametric studies revealed that more corrugated segments improved heat transfer but increased pressure drop: the 72-12 configuration exhibited the best heat transfer, while the 72-2 configuration reduced f by 40.7%. The novel tube showed superior overall performance (Performance Evaluation Criterion (PEC) > 1.24 for all Re), as corrugated segments generated periodic vortices to disrupt the thermal boundary layer, while smooth segments enabled flow redevelopment and pressure recovery. This study provides valuable guidance for designing high-efficiency, low-resistance heat exchange elements. Full article
(This article belongs to the Special Issue Innovations and Inventions in Two-Phase Flow and Heat Transfer)
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