Article
Nuclear Science & Technology
Ji-Hwan Park, Il Seouk Park, Daeseong Jo
Summary: Pool boiling experiments were conducted under isolated bubble regime at 0 degrees and 45 degrees inclination angles. Pressure, buoyancy, and surface tension forces played important roles as a bubble grew and departed from the heating surface. Curvature, base diameter, and bubble volume were used to calculate these forces, while contact angle, base diameter, and volume were evaluated using high-speed camera images. The contact angle equation proposed by Fritz was modified with the contact angles obtained in this study. The growth and departure of bubbles were discussed in relation to the forces of pressure, buoyancy, and surface tension.
NUCLEAR ENGINEERING AND TECHNOLOGY
(2023)
Article
Thermodynamics
Hesam Moghadasi, Hamid Saffari, Navid Malekian
Summary: The study investigates the effect of different surface structuring methods on heat transfer in nucleate pool boiling, showing that surfaces treated by etching and WEDM methods can significantly enhance heat transfer performance.
EXPERIMENTAL HEAT TRANSFER
(2021)
Article
Thermodynamics
M. Esawy, Amir Hossein Nikoo, M. Reza Malayeri
Summary: The superiority of enhanced boiling on structured heat transfer surfaces is due to excessive bubble generation and behavior as well as the latent heat of evaporation. While these factors lead to higher heat transfer coefficients, they also accelerate fouling for aqueous solutions with inverse solubility. The study finds that Turbo-B tubes demonstrate better anti-fouling behavior compared to plain tubes and low finned tubes.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Hesam Moghadasi, Navid Malekian, Ehsan Aminian, Hamid Saffari
Summary: This paper investigates entropy generation analysis in pool boiling and the mechanisms of entropy generation through energy transfer via circular surfaces. Two models are developed to analyze the effect of different parameters on pool boiling heat transfer. The results show that increasing wall superheat temperature, contact angle, Prandtl number, and surface diameter enhances heat flux and entropy generation.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
Siddharth Iyer, Apurv Kumar, Joe Coventry, Wojciech Lipinski
Summary: A mechanistic model is proposed to study the growth of a bubble in pool boiling, considering the change in shape of the bubble as it grows. The model consists of three sub-models for heat transfer, forces acting on the bubble, and the change in shape. The model is validated against experiments and simulations, showing good agreement in the bubble departure time, wall temperature, bubble shape, and microlayer profile.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Nanoscience & Nanotechnology
Jingwen Li, Zhen Yang, Yuanyuan Duan
Summary: Numerical study on single bubble growth in saturated pool boiling reveals the significant impact of microlayer evaporation on bubble growth, with thinner microlayer leading to higher evaporation rate and bubble growth rate. Additionally, contact angle and wall superheat were found to influence bubble growth rate and departure diameter. The heat transferred by microlayer evaporation plays a crucial role in bubble growth.
Article
Thermodynamics
Gangtao Liang, Han Yang, Jiajun Wang, Shengqiang Shen
Summary: This study assesses the pool boiling critical heat flux (CHF) of nanofluids, demonstrating that the maximum CHF ratio of nanofluid to base fluid can reach 4 and 4.6 for different orientations of heaters. The type of heater (wire or block) has a significant impact on CHF, with direct electric-heating wire heaters accelerating nanoparticle deposition. Pressure and nanoparticle size affect CHF, but dispersion level of particles in base fluid plays a more crucial role in determining CHF ratio.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Vladimir Serdyukov, Sergey Starinskiy, Ivan Malakhov, Alexey Safonov, Anton Surtaev
Summary: Surface modification using laser texturing shows great potential in enhancing heat transfer and increasing critical heat fluxes during pool boiling on metal surfaces. The experiments demonstrate that the laser-textured surface significantly improves heat transfer compared to untreated and polished surfaces. High-speed video recording analysis reveals that laser treatment leads to increased nucleation site density and frequency, as well as reduced bubble departure diameter.
APPLIED THERMAL ENGINEERING
(2021)
Article
Mechanics
S. Mukherjee, P. C. Mishra, P. Chaudhuri, N. Ali, S. A. Ebrahim
Summary: An experimental study was conducted to investigate the thermal performance of water/titania nanofluid under nucleate pool boiling. The results showed an increase in heat transfer coefficient as heat flux and weight concentration increased, but the enhancement decreased at higher weight concentrations. New correlations with high prediction accuracies were proposed to relate wall superheat temperature with heat flux and heat transfer coefficient.
Article
Thermodynamics
L. Surya Narayan, Atul Srivastava
Summary: Experiments were conducted to understand the relationship between dynamics of superheat layer, microlayer evaporation, and bubble growth process during single bubble formation under saturated pool boiling regime. The results showed that the heat flux dissipated in the microlayer region is high during the initial stages of bubble growth, leading to a large temperature drop in that region. As the bubble growth process progresses, the depletion rate of the inner core region of microlayer decreases while the evaporation rate of its peripheral region increases.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Swapan Paruya, Jyoti Bhati, Farheen Akhtar
Summary: An improved numerical model was developed to simulate the dynamics of bubble shape and departure in nucleate pool boiling. The model was validated through comparisons with experimental and literature results. Bubble shape was found to be influenced by superheat and Bond number, with direct numerical integration of Young-Laplace working well for spherical bubbles and an approximate analytical solution working better for non-spherical bubbles.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Fernando G. de Souza, Luis H. R. Cisterna, Fernando H. Milanez, Marcia B. H. Mantelli
Summary: This paper presents an experimental study on the Geyser Boiling phenomenon in two-phase thermosyphons operating with two working fluids simultaneously. The influence of various parameters on the amplitude and frequency of the Geyser Boiling phenomenon is investigated, and it is concluded that the phenomenon can be characterized by Reynolds, Jakob and Bond numbers. Two extreme low and high performance conditions are observed in the Geyser Boiling regime operation.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Thermodynamics
Jielin Luo, Hongxing Yang
Summary: This study experimentally investigated the nucleate pool boiling enhancement of steroidal bile salts on a copper surface. Four types of bile salts were found effective in improving the heat transfer coefficient (HTC) in aqueous form, with SDC showing the most significant effect. The deposited surface of STGC exhibited simultaneous improvement in critical heat flux (CHF) and HTC with long-term repeatability. The findings of this study can contribute to the development of bio-friendly surfactant-aided energy conversion applications and new-generation green surfactant materials.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Li Chang, Ali S. Rangwala
Summary: Turbulence has a significant impact on nucleate boiling heat transfer, with increased turbulence leading to enhanced heat transfer efficiency, as reflected in bubble departure frequency, critical heat flux, and bubble behaviors.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Energy & Fuels
Mohd Danish, Mohammed K. Al Mesfer, Khursheed B. Ansari, Mudassir Hasan, Abdelfattah Amari, Babar Azeem
Summary: The study predicts heat flux in nucleate pool boiling using a macrolayer and latent heat evaporation model, highlighting the importance of wall superheat and macrolayer thickness in predicting heat flux. Experimental validation confirms the accuracy of the predicted model, emphasizing the significance of conduction heat transfer in the high heat flux region.
Article
Computer Science, Interdisciplinary Applications
Bruno van Ruymbeke, Yuichi Murai, Yuji Tasaka, Yoshihiko Oishi, Celine Gabillet, Catherine Colin, Noureddine Latrache
JOURNAL OF VISUALIZATION
(2017)
Article
Thermodynamics
S. Fau, W. Bergez, C. Colin
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2017)
Article
Thermodynamics
Lucia Rueda Villegas, Sebastien Tanguy, Guillaume Castanet, Ophelie Caballina, Fabrice Lemoine
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2017)
Article
Thermodynamics
A. Urbano, S. Tanguy, G. Huber, C. Colin
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2018)
Article
Mechanics
A. Dalmon, M. Lepilliez, S. Tanguy, A. . Pedrono, B. Busset, H. . Bavestrello, J. Mignot
JOURNAL OF FLUID MECHANICS
(2018)
Article
Physics, Fluids & Plasmas
M. Lebon, J. Sebilleau, C. Colin
PHYSICAL REVIEW FLUIDS
(2018)
Article
Thermodynamics
Annagrazia Orazzo, Sebastien Tanguy
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2019)
Article
Thermodynamics
Elena-Roxana Popescu, Sebastien Tanguy, Catherine Colin
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2019)
Article
Thermodynamics
V Scheiff, N. Baudin, P. Ruyer, J. Sebilleau, C. Colin
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2019)
Article
Thermodynamics
A. Urbano, S. Tanguy, C. Colin
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2019)
Proceedings Paper
Mining & Mineral Processing
D. Nguyen, E. G. Macchi, C. Colin, N. Tauveron, T. Tartiere
ISRM EUROPEAN ROCK MECHANICS SYMPOSIUM EUROCK 2017
(2017)
Article
Mechanics
Catherine Colin, Olivier Kannengieser, Wladimir Bergez, Michel Lebon, Julien Sebilleau, Michael Sagan, Sebastien Tanguy
COMPTES RENDUS MECANIQUE
(2017)
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)