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  • Open Access

    ARTICLE

    Artificial Intelligence-Driven FVM-ANN Model for Entropy Analysis of MHD Natural Bioconvection in Nanofluid-Filled Porous Cavities

    Noura Alsedais1, Mohamed Ahmed Mansour2, Abdelraheem M. Aly3, Sara I. Abdelsalam4,5,*

    Frontiers in Heat and Mass Transfer, Vol.22, No.5, pp. 1277-1307, 2024, DOI:10.32604/fhmt.2024.056087 - 30 October 2024

    Abstract The research examines fluid behavior in a porous box-shaped enclosure. The fluid contains nanoscale particles and swimming microbes and is subject to magnetic forces at an angle. Natural circulation driven by biological factors is investigated. The analysis combines a traditional numerical approach with machine learning techniques. Mathematical equations describing the system are transformed into a dimensionless form and then solved using computational methods. The artificial neural network (ANN) model, trained with the Levenberg-Marquardt method, accurately predicts values, showing high correlation (R = 1), low mean squared error (MSE), and minimal error clustering. Parametric analysis reveals significant… More >

  • Open Access

    ARTICLE

    Numerical Simulation of Liquified Natural Gas Boiling Heat Transfer Characteristics in Helically Coiled Tube-in-Tube Heat Exchangers

    Fayi Yan*, He Lu, Shijie Feng

    Frontiers in Heat and Mass Transfer, Vol.22, No.5, pp. 1493-1514, 2024, DOI:10.32604/fhmt.2024.055324 - 30 October 2024

    Abstract Helically coiled tube-in-tube (HCTT) heat exchangers are widely applied to the process technology because of their compactness and higher heat transfer efficiency. HCTT heat exchangers play an important role in liquified natural gas (LNG) use and cold energy recovery. The heat transfer characteristics, pressure distribution, and degree of vaporization of LNG in HCTT heat exchangers are numerically investigated. By comparing the simulation results of the computational model with existing experimental results, the effectiveness of the computational model is verified. The numerical simulation results show the vapor volume fraction of the HCTT heat exchanger is related… More >

  • Open Access

    ARTICLE

    Impact of Viscous Dissipation and Ohmic Heating on Natural Convection Heat Transfer in Thermo-Magneto Generated Plume

    Sahar Anwar1, Ghulam Rasool2,*, Muhammad Ashraf1, Uzma Ahmad1, Tao Sun2,*

    Frontiers in Heat and Mass Transfer, Vol.22, No.5, pp. 1323-1341, 2024, DOI:10.32604/fhmt.2024.055314 - 30 October 2024

    Abstract The present investigation centers on the impact of viscous dissipation and ohmic heating on the plume generated by a line heat source under the impact of an aligned magnetic field. In this study, the flow model is adapted to incorporate ohmic heating and viscous dissipation by including the respective terms in the energy equation. A mathematical model is formulated as a system of coupled partial differential equations to analyze the flow problem. Subsequently, a numerical solution is derived with stream function formulation for the system of coupled partial differential equations, which transmutes it into ordinary… More > Graphic Abstract

    Impact of Viscous Dissipation and Ohmic Heating on Natural Convection Heat Transfer in Thermo-Magneto Generated Plume

  • Open Access

    ARTICLE

    Effect of the Geometrical Parameter of Open Microchannel on Pool Boiling Enhancement

    Ali M. H. Al-Obaidy*, Ekhlas M. Fayyadh, Amer M. Al-Dabagh

    Frontiers in Heat and Mass Transfer, Vol.22, No.5, pp. 1421-1442, 2024, DOI:10.32604/fhmt.2024.055063 - 30 October 2024

    Abstract High heat dissipation is required for miniaturization and increasing the power of electronic systems. Pool boiling is a promising option for achieving efficient heat dissipation at low wall superheat without the need for moving parts. Many studies have focused on improving heat transfer efficiency during boiling by modifying the surface of the heating element. This paper presents an experimental investigation on improving pool boiling heat transfer using an open microchannel. The primary goal of this work is to investigate the impact of the channel geometry characteristics on boiling heat transfer. Initially, rectangular microchannels were prepared… More > Graphic Abstract

    Effect of the Geometrical Parameter of Open Microchannel on Pool Boiling Enhancement

  • Open Access

    ARTICLE

    Magneto-Hydro-Convective Nanofluid Flow in Porous Square Enclosure

    B. Ould Said1, F. Mebarek-Oudina2,*, M. A. Medebber3

    Frontiers in Heat and Mass Transfer, Vol.22, No.5, pp. 1343-1360, 2024, DOI:10.32604/fhmt.2024.054164 - 30 October 2024

    Abstract In this work, a steady mixed convection in a two-dimensional enclosure filled viananoliquid Cu/H2O through a porous medium was numerically analyzed. The nanoliquid flow is designated utilizing the Brinkman-Forchheimer model. The upper and the bottom horizontal walls are considered to be hot (Th) and cold temperature (Tc), respectively, whereas the other walls are thermally insulated. The impact of various dimensionless terms such as the Grashof number (Gr) in the ranges (0.01–20), the Reynolds number (Re) in the ranges (50–500), the Hartman number (Ha) in the ranges (0–20), and three different location cases (0.25, 0.5, and More >

  • Open Access

    ARTICLE

    Modeling of the Adsorption Allowing for the Changing Adsorbent Activity at Various Stages of the Process

    Marat Satayev1,2,*, Abdugani Azimov2, Arnold Brener2, Nina Alekseyeva1, Zulfia Shakiryanova2

    Frontiers in Heat and Mass Transfer, Vol.22, No.5, pp. 1533-1558, 2024, DOI:10.32604/fhmt.2024.052901 - 30 October 2024

    Abstract The goal of this work is, first of all, to construct a mathematical model of the mass transfer process in porous adsorption layers, taking into account the fact that in most cases the adsorption process is carried out in non-stationary technological modes, which requires a clear description of its various stages. The scientific contribution of the novel model is based on a probability approach allowing for deriving a differential equation that takes into account the diffusion migration of adsorbed particles. Solving this equation allows us to calculate the reduced degree of the adsorption surface coverage… More >

  • Open Access

    ARTICLE

    Investigation of the Structure Design and Heat Transfer Characteristics of Heating Cable

    Lihui Zhang1, Huichuang Yang1, Weigang Li3, Jixin Xu3, Wei Zhou2, Donghui Wen4, Yanmin Zhang3,*

    Frontiers in Heat and Mass Transfer, Vol.22, No.5, pp. 1477-1492, 2024, DOI:10.32604/fhmt.2024.052675 - 30 October 2024

    Abstract Indoor heating with an electrical heating cable, which has no harmful emissions to the environment, is an attractive way for radiant floor heating. To improve the heat transfer efficiency, a novel structure of the heating cable was designed by proposing the concept of the aluminum finned sheath. The transient heat transfer model from the embedded heating cables to the floor is established to validate the feasibility of this novel cable. The effects of the fin number and shape on the cable’s temperature and heat flux distribution were analyzed. The results show that, with the specific More > Graphic Abstract

    Investigation of the Structure Design and Heat Transfer Characteristics of Heating Cable

  • Open Access

    ARTICLE

    Recovery of Solid Oxide Fuel Cell Waste Heat by Thermoelectric Generators and Alkali Metal Thermoelectric Converters

    Wenxia Zhu*, Baishu Chen, Lexin Wang, Chunxiang Wang

    Frontiers in Heat and Mass Transfer, Vol.22, No.5, pp. 1559-1573, 2024, DOI:10.32604/fhmt.2024.047351 - 30 October 2024

    Abstract A Solid Oxide Fuel Cell (SOFC) is an electrochemical device that converts the chemical energy of a substance into electrical energy through an oxidation-reduction mechanism. The electrochemical reaction of a solid oxide fuel cell (SOFC) generates heat, and this heat can be recovered and put to use in a waste heat recovery system. In addition to preheating the fuel and oxidant, producing steam for industrial use, and heating and cooling enclosed rooms, this waste heat can be used for many more productive uses. The large waste heat produced by SOFCs is a worry that must… More >

  • Open Access

    MINI REVIEW

    Interplay between Plants and Microbial Communities: Insights from Holobionts and Environmental Interactions

    Sejin Choi1,2, Ho-Seok Lee1,2,*

    Phyton-International Journal of Experimental Botany, Vol.93, No.10, pp. 2519-2534, 2024, DOI:10.32604/phyton.2024.058012 - 30 October 2024

    Abstract Plants interact with a complex network of microorganisms, forming a dynamic holobiont that is crucial for their health, growth, and adaptation. This interconnected system is deeply influenced by environmental factors, which modulate the relationships within the plant microbiome. Key environmental drivers such as light, temperature, and moisture can alter the balance of these interactions, impacting plant immunity, resilience, and overall fitness. The traditional disease triangle model, which emphasizes plant-pathogen-environment interactions, is enhanced by incorporating the role of the microbiome, revealing how microbial communities contribute to disease outcomes. This review highlights the importance of shifting focus More >

  • Open Access

    ARTICLE

    An Efficient Plant Regeneration System for Different Explants of Rare and Endangered Plants in Mussaenda anomala

    Gaoyin Wu1,#, Yundou Pang1,#, Ya Tan1, Zhongcheng Peng1, Shuanggui Geng1, Guanglin Tao2, Qiuying Li1, Shuang Wang1, Lihong Zhang1, Quanyan Tian1, Yingliang Liu1,*

    Phyton-International Journal of Experimental Botany, Vol.93, No.10, pp. 2597-2611, 2024, DOI:10.32604/phyton.2024.056875 - 30 October 2024

    Abstract To establish an efficient regeneration method for the rare and endangered plant Mussaenda anomala to address problems regarding its reproductive obstacles and scarce populations. In this study, the terminal buds, axillary buds, stem segments with two axillary buds, stem segments with two axillary buds and one terminal bud, and leaves of M. anomala were used as explants. The effects of different explants and disinfection methods, plant growth regulators and substrates on plant regeneration were explored. The following results were obtained: (1) The terminal bud was a suitable explant for M. anomala tissue culture, and the disinfection method utilized… More >

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