35th UIT Heat Transfer Conference (UIT2017)

The 33rd UIT (Italian Union of Thermo-Fluid Dynamics) Heat Transfer Conference was organized by the Dept. of Industrial and Information Engineering and Economics, University of L'Aquila (Italy) and was held at the Engineering Campus of Monteluco di Roio, L'Aquila, June 22-24, 2015.The annual UIT conference, which has grown over time, came back to L'Aquila after 21 years.The scope of the conference covers a range of major topics in theoretical, numerical and experimental heat transfer and related areas, ranging from energy efficiency to nuclear plants. This year, there was an emphasis on IR thermography, which is growing in importance both in scientific research and industrial applications.2015 is also the International Year of Light. The Organizing Committee honored this event by introducing a new section, Technical Seminars, which in this edition was mainly devoted to optical flow visualization (also the subject of three different national workshops organized in L'Aquila by UIT in 2003, 2005 and 2008).The conference was held in the recently repaired Engineering buildings, six years after the 2009 earthquake and 50 years after the beginning of the Engineering courses in L'Aquila.Despite some logistical difficulties, 92 papers were submitted by about 270 authors, on eight different topics: heat transfer and efficiency in energy systems, environmental technologies and buildings (32 papers); micro and nano scale thermo-fluid dynamics (5 papers); multi-phase fluid dynamics, heat transfer and interface phenomena (16 papers); computational fluid dynamics and heat transfer (15 papers); heat transfer in nuclear plants (6 papers); natural, forced and mixed convection (6 papers); IR thermography (4 papers); conduction and radiation (3 papers).The conference program scheduled plenary, oral and poster sessions. The three invited plenary Keynote Lectures were given by Prof. Antonio Barletta (University of Bologna, Italy), Prof. Jean-Christophe Batsale (Arts et Metiers Paris Tech, Talence, France) and Prof. Walter Grassi (University of Pisa, Italy). The two invited Technical Seminars were given by Dr. Maurizio Santini (University of Bergamo, Italy) and Prof. Giovanni Tanda (University of Genova, Italy). There were also 13 oral sessions and three poster sessions.This special issue collects the five papers presented in the plenary sessions (keynote lectures and technical seminars) plus 60 papers selected from those presented and discussed during the congress.The UIT 2015 conference has been a useful occasion to stimulate discussion, further the understanding of heat transfer and related phenomena, present the state-of-the-art of some topics, discuss emerging trends and promote collaborations. We hope this issue will maintain and extend some of these features.A special thank you is due to the Organizing and Scientific Committees, to the sponsors and to all the participants.

The 37th UIT Heat Transfer Conference was organized by the Department of Industrial Engineering at University of Padova (Italy) and held at Centro Linguistico di Ateneo, Padova, on June 24-26, 2019.The annual UIT Conference, which has grown over time, was held in Padova for the first time since the foundation of this conference.The scope of the conference covers a range of many topics in theoretical, numerical and experimental heat transfer and related areas, ranging from energy efficiency to nuclear plants. This time the UIT Conference included an International Symposium on “Refrigerants: heat transfer and applications”. This Symposium was held on June 26, 2019, which was the first World Refrigeration Day, and was organized in collaboration with CNR, Istituto per le Tecnologie della Costruzione.In this conference edition, 99 papers were contributed plus three keynote lectures. The keynote lectures were given by Srinivas Garimella (Georgia Institute of Technology, USA), Alberto Cavallini (Emeritus professor at University of Padova) and Enrico Nobile (University of Trieste). For the Symposium on Refrigerants, invited lectures were given by Pega Hrnjak (University of Illinois at Urbana-Champaign, USA), Bjorn Palm (Royal Institute of Technology, Sweden), Petter Neksa (Norwegian University of Science and Technology, Norway) and José Miguel Corberan (Universidad Politecnica de Valencia, Spain).These proceedings collects two keynote lectures and 58 papers selected from those presented and discussed during the Conference.The conference was an important occasion to stimulate discussion, improve the understanding of heat transfer and related phenomena, present the state of the art of some topics, discuss emerging trends and promote collaborations.A special thank is due to the Organizing and Scientific Committees, to the Sponsors, to the Reviewers of the papers and to all the Participants.Davide Del Col, Luisa Rossetto and Stefano Bortolin - Editors List of Scientific Committee, Organizing Committee and Sponsors are available in this PDF.

The 2020 UIT (Italian Union of Thermo-Fluid Dynamics) Seminar on Heat Transfer, hereafter referred as 2020 UIT-HTS, was organized by the Department of Civil and Mechanical Engineering of the University of Cassino (Italy), in collaboration with the UIT, on September 28th 2020.The 2020 UIT-HTS was organized by the Organizing Committee of the 38th UIT Heat Transfer Conference, initially scheduled for June 22nd-24th 2020 at the Castello di Gaeta, Italy. Considering the criticalities induced by the spread of COVID-19, difficulties in travelling, social distancing, and strict rules to follow, the Organizing Committee made the difficult decision to postpone 38th UIT Heat Transfer Conference, while organizing the 2020 UIT-HTS event to give the opportunity to the authors to introduce their valuable papers in 7 online parallel technical sessions. The 2020 UIT-HTS event was completely free of charge and was organized virtually using the platform Google Meet. A total of 90 abstracts were originally submitted to the 38th UIT Heat Transfer Conference and the 2020 UIT-HTS offered the opportunity to researchers to share their papers through digital platform without any restriction.The 2020 UIT-HTS program scheduled a plenary lecture given by Prof. Paolo Vigo from the University of Naples “Parthenope” while each author confined his talk in 10 minutes, followed by questions and answers. The majority of participants were from Italy, with a total number of about 100 researchers connected to the 2020 UIT-HTS event. The 2020 UIT-HTS was a useful occasion to stimulate discussion, further the understanding of heat transfer and related phenomena, present the state-of-the-art of some topics, discuss emerging trends and promote collaborations. The Organizing Committee hope that the event results constituted significant contribution to the knowledge in the following fields: computational fluid dynamic and heat transfer; conduction, radiation and thermophysical properties; heat and mass transfer in energy systems and nuclear plants; heat transfer in porous media; measurement techniques for heat and mass transfer, micro and nano scale thermo-fluid dynamics; natural, forced and mixed convection; and two-phase/multiphase fluid dynamics, heat transfer and interface phenomena.A special tank to UIT, international advisory committee, local organizing committee and all the participants.With Kind RegardsPaolo Vigo, Università di Napoli “Parthenope”, ItalyMarco Dell’Isola, Università degli Studi di Cassino e del Lazio Meridionale, ItalyFausto Arpino, Università degli Studi di Cassino e del Lazio Meridionale, ItalyAlfonso Niro, Politecnico di Milano, ItalyList of Committees, Contact details for the declaration are available in this Pdf.

The 2023 UIT (Italian Union of Thermo-Fluid Dynamics) International Conference, hereafter referred as 40th UIT 2023, was organized by the Department of Engineering at the University of Perugia (Italy), in collaboration with the UIT, on June 26-28 2023, at Palazzo Bernabei, Assisi.The annual UIT Conference was held in Assisi for the first time. The scope of the Conference covered a range of topics in computational fluid-dynamics and heat transfer; thermophysical properties; heat and mass transfer for sustainable energy systems; experimental techniques for heat and mass transfer; multiphase fluid-dynamics; natural, forced and mixed convection.The 40th UIT Heat Transfer Conference 2023 program scheduled three keynote lectures by international recognised scientists: Ibrahim Dincer from Ontario Tech. University (Oshawa, Ontario) about the role of thermodynamics in integrated energy systems; Gary Neil Coleman from NASA Langley Research Center (Hampton, USA) about numerical studies of turbulent supersonic plane-channel flows; and Sauro Filippeschi from University of Pisa (Italy) about wickless two phase heat transfer devices. A total of 97 papers were submitted to the 40th UIT Heat Transfer Conference 2023, 75 of which presented by the Authors in oral sessions and the remaining 22 in one poster session.About 150 researchers participated to the 40th UIT 2023. The Conference was a useful occasion to stimulate discussion, further understanding about heat transfer and related phenomena, present the state-of-the-art of some topics, discuss emerging trends, and promote collaborations.The Organizing Committee hopes that the event results constituted a significant contribution to the knowledge in the fields of thermos-fluid dynamics and heat transfer.A special thanks to UIT, all the people who contributed to the success of the event, the International Advisory Committee, the Local Organizing Committee, and to all the Conference attendees.With Kind RegardsFranco Cotana, Università di Perugia, ItalyFederico Rossi, Università di Perugia, ItalyCinzia Buratti, Università di Perugia, ItalyList of Committees are available in this pdf.

Heat transfer—a review of 1974 literature

The annual Conference of the ‘‘Unione Italiana di Termofluidodinamica’’ (UIT) aims to promote cooperation in the field of heat transfer and thermal sciences by bringing together scientists and engineers working in related areas.The 32nd UIT Conference was held in Pisa, from the 23rd to the 25th of June, 2014 in the buildings of the School of Engineering, just a few months after the celebration of the 100th anniversary of the first Institution of the School of Engineering at the University of Pisa.The response was very good, with more than 100 participants and 80 high-quality contributions from 208 authors on seven different heat transfer related topics: Heat transfer and efficiency in energy systems, environmental technologies, and buildings (25 papers); Micro and nano scale thermo–fluid dynamics (9 papers); Multi–phase fluid dynamics, heat transfer and interface phenomena (14 papers); Computational fluid dynamics and heat transfer (10 papers); Heat transfer in nuclear plants (8 papers); Natural, forced and mixed convection (10 papers) and Conduction and radiation (4 papers).To encourage the debate, the Conference Program scheduled 16 oral sessions (44 papers), three ample poster sessions (36 papers) and four invited lectures given by experts in the various fields both from Industry and from University. Keynote Lectures were given by Dr. Roberto Parri (ENEL, Italy), Prof. Peter Stephan (TU Darmstadt, Germany), Prof. Bruno Panella (Politecnico di Torino), and Prof. Sara Rainieri (Universit;aacute; di Parma).This special volume collects a selection of the scientific contributions discussed during this conference. A total of 46 contributions, two keynote lectures and 44 papers both from oral and poster sessions, have been selected for publication in this special issue, after a second accurate revision process. These works give a good overview of the state of the art of Italian research in the field of Heat Transfer related topics at the date.The editors of the volume would like to sincerely thank the authors for presenting their works at the conference and in this special issue. Special thanks are also due to the Scientific Committee, to all the reviewers, and to all the authors for their accurate revision process of each paper for this special issue. Special thanks go to the Organizing Committee, chaired by Prof. Paolo Di Marco.Walter Grassi (Chairman of the Scientific Committee), Alessandro Franco, Nicola Forgione, Daniele Testi – Editors of the Special Issue

The annual Conference of the ‘‘Unione Italiana di Termofluidodinamica’’ (UIT) aims at promoting cooperation in the field of heat transfer and thermal sciences, by bringing together scientists and engineers working in related areas.The 31st UIT Conference was held in Moltrasio (Como), Italy, 25–27 June, 2013 at the Grand Hotel Imperiale. The response has been enthusiastic, with more than 70 quality contributions from 224 authors on heat transfer related topics: natural, forced and mixed convection, conduction, radiation, multi-phase fluid dynamics and interface phenomena, computational fluid dynamics, micro- and nano-scales, efficiency in energy systems, environmental technologies and buildings.To encourage the debate, the Conference Program has scheduled ample poster sessions and invited lectures from the best experts in the field along with a few of the most talented researchers. Keynote Lectures were given by Professor Roberto Mauri (University of Pisa), Professor Lounés Tadrist (Polytech Marseille) and Professor Maurizio Quadrio (Politecnico di Milano).This special volume collects a selection of the scientific contributions discussed during this conference; these works give a good overview of the state-of-the art Italian research in the field of Heat Transfer related topics. I would like to thank sincerely the authors for presenting their works at the conference and in this special issue. I would also like to extend my thanks to the Scientific Committee and the authors for their accurate review process of each paper for this special issue. Special thanks go to the organizing committee and to our sponsors. As a professor of Politecnico di Milano, let me say I am very proud to have been the chair of this conference in the 150th anniversary of my university. Professor Alfonso Niro Details of organizers, sponsors and committees, as well as further information, are available in the PDF

It is our great pleasure to present the Proceedings of the 41st UIT International Heat Transfer Conference, held from 19 to 21 June 2024 at the Congress Centre of the Università degli Studi di Napoli Federico II, organized by the Dipartimento di Ingegneria Industriale. This year, the conference held special significance as it took place within the events celebrating the eight hundredth anniversary of the foundation of the Università degli Studi di Napoli Federico II, a milestone underscoring the university’s long-standing tradition of excellence in education and research. The conference was attended by approximately 180 participants, including 85 members of the UIT community, 40 non-members, and 55 students. The sessions were dedicated to key topics such as Computational Fluid Dynamics, Conduction Radiation and Thermophysical Properties, Heat and Mass Transfer in Energy Systems and Nuclear Plants, Natural, Forced, and Mixed Convection, Micro and Nano-Scale Heat Transfer, and Multiphase Heat Transfer. The program featured three keynote lectures, during which distinguished speakers shared their insights on pressing issues and emerging challenges in the field. Additionally, the Program Manager of the European Innovation Council presented valuable opportunities for transferring research into innovation, bridging the gap between academia and industry. List of Conference Chairs, Scientific Committee, Organizing Committee, Sponsors and Editors contact details are available in this Pdf.

Heat transfer — a review of 1992 literature

This study outlines the estimation of entropy generation of a stored liquid-vapour combination. A salient feature of the present study is the incorporation of a separated flow model for the calculation of entropy generated by a diabatic two phase system. Equations of state corresponding to different thermodynamic equilibria are used for these calculations. Two distinct expressions are proposed for the determination of the total entropy generated by the diabatic saturated two phase system that comprise liquid and ullage regions. The dissipative energy losses in various liquid-ullage systems is quantified through the derived mathematical relations obtained for the overall entropy generated by the system. These developed expressions form the basis of an experimental determination of the entropy generation rate. A parametric study on temperature influencing entropy generation has been performed in the context of different thermal transport mechanisms. The influence of fill levels on entropy generation was also analysed by considering a low and an intermediate filling ratio. The study concluded the influence of central zone of thermodynamic equilibrium with maximum wall convection and minimum concentration gradient on the overall entropy generated by the system. References A. Bejan. A study of entropy generation in fundamental convective heat transfers. ASME J Heat Transfer, 101, 1979, 718--725. doi:10.1115/1.3451063 A. Bejan. Second law analysis in heat transfer. Energy, 5, 1980, 721--732. doi:10.1016/0360-5442(80)90091-2 S. Sarangi. and K. Chowdhury. On the generation of entropy in a counter flow heat exchanger. Cryogenics, 22, 1982, 63--65. doi:10.1016/0011-2275(82)90095-9 P. K. Nag and P. Mukherjee. Thermodynamic optimization of convective heat transfer through a duct with constant wall temperature. Int J. Heat and Mass Transfer, 30, 1987, 401--405. doi:10.1016/0017-9310(87)90128-1 A. Bejan A thermodynamic optimization of geometry in engineering flow systems. Exergy Int. Journal, 4, 2001, 269--277. doi:10.1016/S1164-0235(01)00028-0 V. D. Zimparov Extended performance evaluation criteria for enhanced heat transfer surfaces: heat transfer through ducts with constant heat flux. Int J. Heat and Mass Transfer, 44, 2001, 169--180. doi:10.1016/S0017-9310(00)00074-0 H. Abbassi Entropy generation analysis in a uniformly heated micro channel heat sink. Energy, 32, 2007, 1932--1947. doi:10.1016/j.energy.2007.02.007 F. J. Collado The law of stable equilibrium and the entropy-based boiling curve for flow boiling. Energy, 30, 2005, 807--819. doi:10.1016/j.energy.2004.04.007 J. V. C. Vargas and A. Bejan Thermodynamic optimization of the match between two streams with phase change. Energy, 25, 2000, 15--33. doi:10.1016/S0360-5442(99)00052-3 P. K. Nag Engineering Thermodynamics. Tata McGraw-Hill Publishing Company Limited, 2nd Edition, 1996. W. M. Rohsenow, J. P. Hartnett, Y. I. Cho, Hand book of Heat Transfer. McGraw-Hill New York,3rd Edition, 1988. D. Rakshit, R. Narayanaswamy, T. Truong, K. P. Thiagarajan An experimental study on the interface mass transfer governing thermodynamics of stored liquids. Proceedings of the 20th National and 9th International ISHMT-ASME Heat and Mass Transfer Conference, January 4--6, 2010, Mumbai India. C. Balaji, M. Hˆlling, H. Herwig Entropy generation minimization in turbulent mixed convection flows. International Communications in Heat and Mass Transfer, 34, 2007, 544--552. doi:10.1016/j.icheatmasstransfer.2007.01.015 F. P. Incropera, D. P. Dewitt, T. L. Bergmen, A. S. Lavine Introduction to Heat Transfer. John Willey and Sons, 5th Edition, 2005. P.E. Liley, Steam Tables in SI Units, private communication. School of Mechanical Engineering, Purdue University, West Lafayette, IN., 1984. V. V. Malyshev and E. P. Zlobin Evaporation of liquid hydrocarbons in heated closed containers. Translated from Inzheneruo-Fizicheskii Zhurnal, 23, 4, 1972, 701--708. doi:10.1007/BF00835847

Multiphase Flow Dynamics, Volume 1: Fundamentals; Volume 2: Thermal and Mechanical Interactions

In the present work, the macroscopic governing equations governing the heat and mass transfer for a general multicomponent system are derived via a systematic nonequilibrium thermodynamics framework. In contrast to previous approaches, the relative (with respect to the mass average velocity) component mass fluxes (relative species momenta) and the heat flux are treated explicitly, in complete analogy with the momentum flux. The framework followed here, in addition to allowing for the description of relaxation phenomena in heat and mass transfer, establishes to the fullest the analogy between all transport processes, momentum, heat, and mass transfer, toward which R. B. Bird contributed so much with his work. The inclusion of heat flux-based momentum as an additional variable allows for the description of relaxation phenomena in heat transfer as well as of mixed (Soret and Dufour) effects, coupling heat and mass transfer. The resulting models are Galilean invariant, thereby resolving a conundrum in the field, and always respect the second law of thermodynamics, for appropriate selection of transport parameters. The general flux-based dynamic equations reduce to the traditional transport equations in the limit when mass species and heat relaxation effects are negligible and are fully consistent with the equations established from the application of kinetic theory in the limit of dilute gases. As an added benefit, for the particular example case of hyperbolic diffusion we illustrate the application of the proposed models as a method to allow the use of powerful numerical solvers normally not available for solving mass transfer models more generally.

The heat and mass transfer phenomenon due to non-Newtonian nanofluids presents essential applications in various industrial and engineering processes like polymer solutions, manufacturing processes, food processing, pharmaceutical applications, extrusion processes, oil recovery, cooling systems, etc. In order to address the heat and mass transfer phenomenon, the suspension of nanofluids with different non-Newtonian materials has been studied. The objective of the current analysis is to endorse heat and mass transfer prediction due to a Casson–micropolar nanofluid over a bidirectional moving electromagnetic Riga surface. The suspension of micro-organisms is also utilized to predict the significant applications of the bioconvection phenomenon. The investigated analysis is supported with an external heat generation source and activation energy. The enhancement and fluctuation in heat transfer are captured with the addition of thermal radiation impact. The thermal, concentration, and velocity slip effects are utilized to investigate the thermal phenomenon. The shooting algorithm is applied for calculating the numerical simulations. The physical onset behind the variation of parameters is tested and claimed graphically. Current results offer applications in the heat transfer phenomenon, energy systems, solar collectors, manufacturing processes, cooling systems, thermal processes, automotive engineering, etc.

Heat and mass transfer in tubular ceramic membranes for membrane reactors

Realization of non-Fourier phenomena in heat transfer with 2D transfer function