Article
Thermodynamics
C. Thianpong, K. Wongcharee, H. Safikhani, S. Chokphoemphun, A. Saysroy, S. Skullong, S. Eiamsa-ard
Summary: This study utilized a hybrid technique involving TiO2/water nanofluid and loose-fit delta-wing twisted tape to enhance heat transfer efficiency. Experimental results showed that the combined enhancement technique significantly improved heat transfer rates, mainly due to the swirling flow effect and higher thermal conductivity. Furthermore, reducing the loose-fit ratio and increasing the nanofluid concentration can also enhance heat transfer rates and thermohydraulic performance.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Energy & Fuels
Boonsong Samutpraphut, Smith Eiamsa-ard, Varesa Chuwattanakul, Chinaruk Thianpong, Naoki Maruyama, Masafumi Hirota
Summary: This article explores the use of sawtooth twisted tapes to enhance heat transfer rate by generating swirling flow and interrupted flowing disturbance. The effects of sawtooth angles on heat transfer rate, friction factor, and aerothermal performance index are analyzed. The results show that the sawtooth twisted tape improves heat transfer rate and introduces varying levels of pressure loss based on the sawtooth angles. The recommended sawtooth twisted tape outperforms the typical twisted tape and plain tube in terms of Nusselt number.
Article
Thermodynamics
Mohammad Abbaszadeh, Mohammad Hossein Montazeri, Mojtaba Mirzaie
Summary: This study proposes a novel implementation of twisted tape in sinusoidal wavy-walled tubes to enhance heat transfer rate without compromising thermal efficiency. The study numerically investigates the effect of different geometrical configurations on heat transfer improvement and performance factor. The results suggest that implementing twisted tape in wavy tubes significantly increases heat transfer rate and performance factor.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2023)
Article
Nuclear Science & Technology
Tenglong Cong, Bicheng Wang, Hanyang Gu
Summary: This article presents a numerical analysis of sCO2 heat transfer deterioration and the heat transfer enhancement of twisted tape. The results indicate that adding twisted tape can effectively suppress the heat transfer deterioration and the enhancement is more significant with a smaller twist ratio.
NUCLEAR ENGINEERING AND DESIGN
(2022)
Article
Thermodynamics
Mohammad Zaboli, Mehdi Nourbakhsh, Seyed Soheil Mousavi Ajarostaghi
Summary: This study numerically evaluates heat transfer and fluid flow in a corrugate coil tube with different lobe-shaped cross-sections. Spiral twisted tapes with various geometries are used as turbulators in the tube. The results show that a five-lobe cross-section increases the Nusselt number and pressure drop, and increasing the area of the twisted tape also increases these parameters. Additionally, a spiral twisted tape with cleared center improves thermal efficiency in certain cases.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
Chao Luo, KeWei Song
Summary: The novel twisted annulus design in a double-tube heat exchanger shows excellent thermohydraulic performance, significantly enhancing heat transfer efficiency. The results demonstrate the generation of strong secondary flow within the twisted annulus, leading to a significant improvement in heat transfer effectiveness.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Thermodynamics
Toygun Dagdevir, Veysel Ozceyhan
Summary: The effects of different twisted tapes on heat transfer and flow characteristics in a heat exchanger tube were experimentally investigated to enhance performance. Results showed that twisted tape inserts improved heat transfer performance, with the novel dimpled twisted tape insert providing the best performance. Addition of ethylene glycol did not significantly increase the friction factor, and higher ethylene glycol content led to decreased thermo-hydraulic performance.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Thermodynamics
Toygun Dagdevir, Mahmut Uyanik, Veysel Ozceyhan
Summary: Experimental investigation on heat transfer enhancement using various twisted tape inserted tube configurations under turbulent flow conditions. Results show that DTTEs have better heat transfer performance compared to PTTEs, while PTTEs have less friction loss.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Thermodynamics
Kim Leong Liaw, Jundika C. Kurnia, Agus P. Sasmito
Summary: This study investigated the effect of inserting twisted tape into a helical tube on turbulent heat transfer, finding that the insertion of twisted tape increases the intensity of secondary flow in the radial direction, resulting in higher heat transfer performance. The results also showed that for all cases, higher inlet Reynolds numbers lead to a proportional increase in heat transfer, while the friction coefficient decreases with decreasing decrement amounts.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Yuxiang Hong, Lei Zhao, Yongchun Huang, Qing Li, Jiajie Jiang, Juan Du
Summary: Waste heat recovery technology is crucial for energy conservation and emission reduction, and the efficiency of heat exchangers plays a decisive role in waste heat recovery. In this study, a synergistic thermal enhancement technology was devised using a spiral corrugated tube (SCT) and multiple twisted tapes (TTs) to improve the heat transfer potential of conventional heat exchangers. Numerical investigations showed that fitting multiple TTs into the SCT homogenized flow fields and temperature distributions, and increased heat transfer efficiency. Perforations on the surface of the TTs reduced friction factor without compromising heat transfer efficiency. By simple perforations, the maximum overall thermal performance evaluation index could be enhanced by around 7.9%.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Energy & Fuels
Rishabh Agarwal, Rajesh Maithani, Sachin Sharma, Anil Kumar, Ajay Kumar
Summary: This study optimized the parameters of twisted tape insert in a heat exchanger tube with SiO2/H2O based nanofluid flow. The goal was to maximize heat transfer while minimizing pressure drop. The optimized parameter values for a specific range of Reynolds number were found to be W-T/D-T of 0.8, L-T/W-T of 1.74, phi of 1.25 vol.%, and Re of 17,000.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Thermodynamics
Li Shijie, Qian Zuoqin, Wang Qiang
Summary: This numerical investigation explores the heat transfer optimization effect of circular tube heat exchanger with L-shaped twisted tape insert and finds the optimal parameter design. The effects of twist pitch, inner diameter, tape width, and number of tape on thermohydraulic performance were studied. Response surface method was used to analyze the relationship between the Nusselt number and these parameters. The results show that the tube fitted with L-shaped twisted tape insert has a significant increase in Nu and friction factor compared to the smooth tube.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
V. Chuwattanakul, K. Wongcharee, P. Ketain, S. Chamoli, C. Thianpong, S. Eiamsa-ard
Summary: An experimental investigation on the aerothermal performance of a heat exchanger tube equipped with newly designed broken V-ribbed twisted tapes (B-VRT) was conducted. The results showed that the B-VRT provided enhanced heat transfer due to increased mixing caused by longitudinal vortices from the ribs and swirling flow from the twisted tapes. The B-VRT with forward facing ribs at an attack angle alpha of 45 degrees exhibited the best performance.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Energy & Fuels
Ayhan Nazmi Ilikan
Summary: Energy efficiency is a key concern in pipe systems, especially when heat transfer plays a significant role. Twisted tape insertion has been used to improve heat transfer in pipes. This numerical study investigated the variations of Nusselt number (Nu) and friction factor (f) with different length ratios (LR) of twisted tapes, Reynolds number values (Re), and flow conditions. The results suggest that an LR of 70% provides the optimal combination of maximum heat transfer and minimum friction, outperforming completely filling the tube with twisted tape.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2023)
Article
Thermodynamics
Orhan Keklikcioglu, Sibel Gunes, Esra Akcadirci, Veysel Ozceyhan
Summary: The experimental results showed that heat transfer, pressure drop, and thermohydraulic performance increased with a decrease in twist ratio y/D and clearance ratio c/D. The best thermohydraulic performance of 1.52 was achieved by twisted tapes with y/D = 2.0 and c/D = 0.0178 at Re = 5000. Regression analysis was used to obtain a correlation of experimental data, with deviations for Nusselt number, friction factor, and thermohydraulic factor within acceptable limits.
HEAT TRANSFER RESEARCH
(2022)
Article
Mathematics, Applied
Fei Xu, Shuang Liang, Yaning Zhang, Bingxi Li, Yiran Hu
Summary: A meso-scale numerical model was developed to study water-air distribution in unsaturated soil, using stochastic generation method and lattice Boltzmann method for numerical solutions of multiphase flow partial differential equation, successfully tracking the formation of water-air interface. The simulated results were similar to literature reports, indicating the model's potential for further research on water-air interface formation.
COMPUTERS & MATHEMATICS WITH APPLICATIONS
(2021)
Article
Mathematics, Applied
Wenke Zhao, Xin Chen, Yaning Zhang, Wentao Su, Fei Xu, Bingxi Li
Summary: The study investigated the deicing performances of a road unit driven by a hydronic heating system in severely cold regions of China using the Open Source Lattice Boltzmann Code. Results showed that air temperature had the most important influence on the melting ratio, while pipe spacing had the most significant impact on the average road surface temperature. In contrast, ice thickness had a slight influence on the melting ratio and average road surface temperature.
COMPUTERS & MATHEMATICS WITH APPLICATIONS
(2021)
Article
Thermodynamics
Wei Wang, Kang Fu, Yaning Zhang, Yufei Tan, Bingxi Li, Bengt Sunden
Summary: The study investigated the enhanced heat transfer mechanism in symmetrical and asymmetrical spirally corrugated tubes by analyzing the entropy and flow patterns. The corrugation angles have significant effects on the strength and location of the detached vortex and spiral flow. The heat transfer entropy is most prominent in the boundary layers.
HEAT TRANSFER ENGINEERING
(2021)
Article
Thermodynamics
Wenke Zhao, Yaning Zhang, Lei Li, Wentao Su, Guiyang Ma, Bingxi Li
Summary: This study used the Monte Carlo method to create a thermal model of porous concrete, analyzing the effects of aggregate areal ratio, air void size, and air void ratio on the road surface temperature. The results showed that these factors have a significant impact on the thermal characteristics of porous concrete.
APPLIED THERMAL ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Wen-Tao Su, Xiao-Bin Li, Yu-Xing Xia, Quan-Zhong Liu, Maxime Binama, Ya-Ning Zhang
Summary: This study uses numerical methods to investigate the dynamic flow characteristics of pump-turbine during runaway, focusing on the time-frequency relationship of pressure pulsations and the characteristics of frequency components. The results show that the low-frequency components of pressure oscillations are universal in the entire flow passage, mainly caused by the temporal changing of flow rate.
Article
Energy & Fuels
Yaning Zhang, Sichen Fan, Tao Liu, Muhammad Mubashar Omar, Bingxi Li
Summary: This article discusses the intensification of aviation oil production from organic wastes through microwave pyrolysis. It identifies the challenges faced in the microwave pyrolysis process and presents solutions for intensification. By carefully selecting and controlling factors such as feedstock, absorbent, temperature, power, and catalyst, high oil yields and similar composition to conventional aviation oil can be achieved.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2022)
Article
Thermodynamics
Wenke Zhao, Yaning Zhang, Xiaoya Cao, Lujie Wang, Bingxi Li
Summary: A hydronic experimental snow-melting system was implemented in Harbin, the coldest provincial capital of China, to investigate the effects of weather conditions on the thermal process. The study found that the average road-surface temperature, snow-free area ratio, period duration, and energy consumption were affected by ambient temperature, snow density, and snow height. The results showed that the thermal processes were similar under certain conditions and were effective within specific ranges.
APPLIED THERMAL ENGINEERING
(2023)
Article
Physics, Multidisciplinary
Chenyang Sun, Yaning Zhang, Chaofeng Hou, Wei Ge
Summary: The LJ potential function was simulated under different characteristic diameters and energies, and the changes in properties such as number density, total energy, phase transition latent heat, and phase transition temperature were studied. The melting and boiling temperatures of the LJ systems decrease with increasing diameter and increase with increasing energy. The phase transition latent heat is hardly affected by diameter but significantly increases with energy.
Article
Chemistry, Multidisciplinary
Sichen Fan, Yaning Zhang, Longfei Cui, Qingang Xiong, Tariq Maqsood
Summary: This study investigated the conversion of polystyrene plastic into aviation fuel through microwave-assisted pyrolysis using different iron-based microwave absorbents (Fe, Fe3O4, and FeS2). The results showed that Fe3O4 had the highest heating rate, Fe had good selectivity for cycloalkenes, and FeS2 had good selectivity for olefins. The highest oil yield was achieved at a pyrolysis temperature of 460 degrees C, microwave power of 650 W, and Fe load of 90 g, and the oil compositions mainly consisted of monocyclic aromatic hydrocarbons, polycyclic aromatic hydrocarbons, olefins, and cycloalkenes.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Energy & Fuels
Longfei Cui, Nan Qin, Hui Li, Ehab Mostafa, Hui Liu, Wenke Zhao, Yaning Zhang
Summary: This study investigated the microwave heating performances of corn straw particles and their dependence on corn straw mass, particle size, and microwave power. The average heating rates were found to vary with microwave power, ranging from 23.06 to 101.46 degrees C/min. The heating rates also varied with particle size, ranging from 37.34 to 101.46 degrees C/min, and with corn straw mass, ranging from 36.31 to 101.46 degrees C/min.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2023)
Editorial Material
Chemistry, Multidisciplinary
Hui Jin, Qingang Xiong, Xiaolei Zhang, Yaning Zhang
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Engineering, Chemical
Yunlei Cui, Hongqing Shi, Yaning Zhang, Longfei Cui, Wenke Zhao, Wei Liu
Summary: The effects of gasification temperature, equivalence ratio, and microwave power on the syngas yields of polypropylene waste were studied. The results showed that within a certain range, increasing gasification temperature and equivalence ratio could improve syngas yield, while increasing microwave power had a certain impact on syngas yield.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Engineering, Chemical
Yifan Liu, Longfei Cui, Hui Liu, Wenke Zhao, Yaning Zhang
Summary: With the rapid economic development, the recycling of PET plastic waste has become an important topic of environmental protection. This study focused on the microwave-assisted PET glycolysis and energy analysis, aiming to produce BHET as the target product from PET waste. The optimal conditions for this process were found to be a reaction temperature of 180 degrees C, a reaction time of 30 min, and a PET particle size of 75 mu m, resulting in high PET conversion rate and BHET yield.
INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING
(2023)
Article
Environmental Sciences
Longfei Cui, Wenke Zhao, Ehab Mostafa, Yaning Zhang
Summary: In this study, the effects of microwave power, reactor chamber volume, and the mass ratio of SiC and corn straw on the heating performances of corn straw particles were investigated. The results showed that the heating rate increased with the increase of microwave power and the mass ratio of SiC and corn straw, while it decreased with the increase of reactor chamber volume.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Hongqing Shi, Yunlei Cui, Yaning Zhang, Wenke Zhao, Wei Liu, Roger Ruan
Summary: Polypropylene waste causes environmental problems. Using microwave assisted heating, this study found that the optimal gas yield was obtained at 900 degrees C, 1000 Watts, and 60:15 mass ratio.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Thermodynamics
Mahsa Taghavi, Swapnil Sharma, Vemuri Balakotaiah
Summary: This study investigates the natural convection effects in the insulation layers of spherical storage tanks and their impact on the tanks' performance. The permeability and Rayleigh number of the insulation material are considered as key factors. The results show that as the Rayleigh number increases, new convective cells emerge and cause the cold boundary to approach the external hot boundary. In the case of large temperature differences, multiple solutions may coexist.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyang Xu, Fangjun Hong, Chaoyang Zhang
Summary: This study introduces a self-induced jet impingement device for enhancing pool boiling performance in high power electronic cooling. Through visualization and parametric investigations, the effects of this device on pool boiling performance are studied, revealing the promotion of additional liquid supply and vapor exhausting. The flow rate of the liquid jet is found to positively impact boiling performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Wenchao Ke, Yuan Liu, Fissha Biruke Teshome, Zhi Zeng
Summary: Underwater wet laser welding (UWLW) is a promising and labor-saving repair technique. A thermal multi-phase flow model was developed to study the heat transfer, fluid dynamics, and phase transitions during UWLW. The results show that UWLW creates a water keyhole, making the welding environment similar to in air laser welding.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Xingrong Lian, Lin Tian, Zengyao Li, Xinpeng Zhao
Summary: This study investigates the heat transfer mechanisms in natural fiber-derived porous structures and finds that thermal radiation has a significant impact on the thermal conductivity in low-density regions, while natural convection rarely occurs. Insulation materials derived from micron-sized natural fibers can achieve minimum thermal conductivity at specific densities. Strategies to lower the thermal conductivity include increasing porosity and incorporating nanoscale pores using nanosize fibers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Yasir A. Malik, Kilian Koebschall, Stephan Bansmer, Cameron Tropea, Jeanette Hussong, Philippe Villedieu
Summary: Ice crystal icing is a significant hazard in aviation, and accurate modeling of sticking efficiency is essential. In this study, icing wind tunnel experiments were conducted to quantify the volumetric liquid water fraction, sticking efficiency, and maximum thickness of ice layers. Two measurement techniques, calorimetry and capacitive measurements, were used to measure the liquid water content and distribution in the ice layers. The experiments showed that increasing wet bulb temperatures and substrate heat flux significantly increased sticking efficiency and maximum ice layer thickness.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinqi Hu, Tongtong Geng, Kun Wang, Yuanhong Fan, Chunhua Min, Hsien Chin Su
Summary: This study experimentally examined the heat dissipation of vibrating fans and demonstrated its inherent mechanism through numerical simulation. The results showed that the flow fields induced by the vibrating blades exhibited pulsating features and formed large-scale and small-scale vortical structures, significantly improving heat dissipation. The study also identified the impacts of different blade structures and developed a trapezoidal-folding blade, which effectively reduced the maximum temperature of the heat source and alleviated high-temperature failure crisis.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Dan-Dan Su, Xiao-Bin Li, Hong-Na Zhang, Feng-Chen Li
Summary: The boiling heat transfer of low-boiling-point working fluid is a common heat dissipation technology in electronic equipment cooling. This study analyzed the interfacial boiling behavior of R134a under different conditions and found that factors such as the initial thickness of the liquid film, solid-liquid interaction force, and initial temperature significantly affect the boiling mode and thermal resistance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyi Wu, Dongke Sun, Wei Chen, Zhenhua Chai
Summary: A unified lattice Boltzmann-phase field scheme is proposed to simulate dendrite growth of binary alloys in the presence of melt convection. The effects of various factors on the growth are investigated numerically, and the model is validated through comparisons and examinations.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shaokun Ge, Ya Ni, Fubao Zhou, Wangzhaonan Shen, Jia Li, Fengqi Guo, Bobo Shi
Summary: This study investigated the temperature distribution of main cables in a suspension bridge during fire scenarios and proposed a prediction model for the maximum temperature of cables in different lane fires. The results showed that vehicle fires in the emergency lane posed a greater thermal threat to the cables.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shuang-Ying Wu, Shi-Yao Zhou, Lan Xiao, Jia Luo
Summary: This paper investigates the two-phase flow and heat transfer characteristics of low-velocity jet impacting on a cylindrical surface. The study reveals that the heat transfer regimes are non-phase transition and nucleate boiling with the increase of heat transfer rate. The effects of jet impact height and outlet velocity on local surface temperatures are pronounced at the non-phase transition stage. The growth rates of heat transfer rate and liquid loss rate increase significantly from the non-phase transition to nucleate boiling stage.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Emad Hasani Malekshah, Wlodzimierz Wlodzimierz, Miros law Majkut
Summary: Cavitation has significant practical importance and can be controlled by air injection. This study investigates the natural to ventilated cavitation process around a hydrofoil through numerical and experimental methods. The results show that the location and rate of air injection have a meaningful impact on the characteristics of cavitation.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Feriel Yahiat, Pascale Bouvier, Antoine Beauvillier, Serge Russeil, Christophe Andre, Daniel Bougeard
Summary: This study explores the enhancement of mixing performance in laminar flow equipment by investigating the generation of chaotic advection using wall deformations in annular geometries. The findings demonstrate that the combined geometry can achieve perfect mixing at various Reynolds numbers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Hui He, Ning Lyu, Caihua Liang, Feng Wang, Xiaosong Zhang
Summary: This study investigates the condensation, frosting, and defrosting processes on superhydrophobic surfaces with millimeter-scale structures. The results reveal that the structures can influence the growth and removal of frost crystals, with the bottom grooves creating a frost-free zone and conical edges promoting higher frost crystal heights. Two effective methods for defrosting are observed: hand-lifting the groove and airfoil retraction contraction on protruding structures. This research provides valuable insights into frost formation and defrosting on millimeter-structured superhydrophobic surfaces, with potential applications in anti-frost engineering.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Thiwanka Arepolage, Christophe Verdy, Thibaut Sylvestre, Aymeric Leray, Sebastien Euphrasie
Summary: This study developed two thermal concentrators, one with a 2D design of uniform thickness and another with a 3D design, using the coordinate transformation technique and metamaterials. By structuring the thermal conductor, the desired local density-heat capacity product and anisotropic thermal conductivities were achieved. The homogenized thermal conductivities were obtained from finite element simulations and cylindrical symmetry consideration. A 3D concentrator was fabricated using 3D metal printing and characterized using a thermal camera. Compared to devices that solely consider anisotropic conductivities, the time evolution characteristics of the metadevice designed with coordinate transformation were closer to those of an ideal concentrator.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Liangyuan Cheng, Qingyang Wang, Jinliang Xu
Summary: In this study, we investigated the supercritical heat transfer of CO2 in a horizontal tube with a diameter of 10.0 mm, covering a wide range of pressures, mass fluxes, and heat fluxes. The study revealed a non-monotonic increase in wall temperatures along the flow direction and observed both positive and negative wall temperature differences between the bottom and top tube. The findings were explained by the thermal conduction in the solid wall interacting with the stratified-wavy flow in the tube.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
