Pub Date : 2015-01-01DOI: 10.1615/COMPUTTHERMALSCIEN.2015014473
B. Sundén, Dan Huang, Zan Wu
Convective heat transfer of aviation kerosene at supercritical pressures in a vertical upward tube with inner diameter 1.8 mm was numerically studied using RNG k-? turbulence model with enhanced wall treatment. The thermo-physical and transport properties of the aviation kerosene at various temperatures were obtained by a 10-species surrogate and the NIST Supertrapp software. The grid independence was first studied and numerical results were then compared with experimental data for validation. Effects of mass flow rate, heat flux, pressure and inlet temperature on the heat transfer performance were investigated. Under flow conditions given in this work, the results show that the heat transfer coefficient increases with mass flow rate, heat flux or inlet temperature, while increase in inlet pressure reduces heat transfer coefficient. The buoyancy force has little effect on heat transfer. (Less)
{"title":"A numerical study on flow and convective heat transfer of aviation kerosene in a vertical mini-tube at supercritical pressures","authors":"B. Sundén, Dan Huang, Zan Wu","doi":"10.1615/COMPUTTHERMALSCIEN.2015014473","DOIUrl":"https://doi.org/10.1615/COMPUTTHERMALSCIEN.2015014473","url":null,"abstract":"Convective heat transfer of aviation kerosene at supercritical pressures in a vertical upward tube with inner diameter 1.8 mm was numerically studied using RNG k-? turbulence model with enhanced wall treatment. The thermo-physical and transport properties of the aviation kerosene at various temperatures were obtained by a 10-species surrogate and the NIST Supertrapp software. The grid independence was first studied and numerical results were then compared with experimental data for validation. Effects of mass flow rate, heat flux, pressure and inlet temperature on the heat transfer performance were investigated. Under flow conditions given in this work, the results show that the heat transfer coefficient increases with mass flow rate, heat flux or inlet temperature, while increase in inlet pressure reduces heat transfer coefficient. The buoyancy force has little effect on heat transfer. (Less)","PeriodicalId":45052,"journal":{"name":"Computational Thermal Sciences","volume":"7 1","pages":"375-384"},"PeriodicalIF":1.5,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67420237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-01-01DOI: 10.1615/COMPUTTHERMALSCIEN.2016015325
J. A. Epstein, Richard D Castellano, J. Shan, D. Birnie
{"title":"Benchtop microreactor built for diagnostic deposition of CU3BIS3 for use in photovoltaic devices","authors":"J. A. Epstein, Richard D Castellano, J. Shan, D. Birnie","doi":"10.1615/COMPUTTHERMALSCIEN.2016015325","DOIUrl":"https://doi.org/10.1615/COMPUTTHERMALSCIEN.2016015325","url":null,"abstract":"","PeriodicalId":45052,"journal":{"name":"Computational Thermal Sciences","volume":"7 1","pages":"501-513"},"PeriodicalIF":1.5,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67420251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-01-01DOI: 10.1615/COMPUTTHERMALSCIEN.2016014791
S. Takeuchi, T. Tsutsumi, K. Kondo, T. Harada, T. Kajishima
This is a pre-copyedited, author-produced PDF of an article accepted for publication in Computational Thermal Sciences following peer review.
这是一个预编辑的，作者制作的PDF格式的文章接受发表在计算热科学同行评审后。
{"title":"Heat transfer in natural convection with finite-sized particles considering thermal conductance due to interparticle contacts","authors":"S. Takeuchi, T. Tsutsumi, K. Kondo, T. Harada, T. Kajishima","doi":"10.1615/COMPUTTHERMALSCIEN.2016014791","DOIUrl":"https://doi.org/10.1615/COMPUTTHERMALSCIEN.2016014791","url":null,"abstract":"This is a pre-copyedited, author-produced PDF of an article accepted for publication in Computational Thermal Sciences following peer review.","PeriodicalId":45052,"journal":{"name":"Computational Thermal Sciences","volume":"7 1","pages":"385-404"},"PeriodicalIF":1.5,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67420243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-03-14DOI: 10.1615/COMPUTTHERMALSCIEN.2014005831
Tsuyoshi Yamamoto, T. Kuwahara, Kakeru Yoshino, K. Nakaso, Takahisa Yamamoto
{"title":"Numerical investigation of cooling characteristics for fine mist cooling of high temperature material","authors":"Tsuyoshi Yamamoto, T. Kuwahara, Kakeru Yoshino, K. Nakaso, Takahisa Yamamoto","doi":"10.1615/COMPUTTHERMALSCIEN.2014005831","DOIUrl":"https://doi.org/10.1615/COMPUTTHERMALSCIEN.2014005831","url":null,"abstract":"","PeriodicalId":45052,"journal":{"name":"Computational Thermal Sciences","volume":"6 1","pages":"69-78"},"PeriodicalIF":1.5,"publicationDate":"2014-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1615/COMPUTTHERMALSCIEN.2014005831","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67419700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.1615/COMPUTTHERMALSCIEN.2014010121
J. Reizes
As with Lappa’s earlier book, “Thermal Convection: Patterns, Evolution and Stability” (Wiley, 2010), this book is not about heat transfer. The focus of the book is about the fluid mechanics of flows in rotating systems in which thermal gradients are present. Again, similar to the previous volume, the emphasis is on the physics and the mathematical treatments of such flows; in particular the stability of these flows. There is therefore no discussion of either numerical or experimental procedures. The results of computational simulations and complex experiments are used to illustrate and develop the ideas being discussed. This book is hardly an introduction to thermal flows in rotating systems and is not designed for a novice in the subject. Rather, it is a voyage through the physics of a myriad of wonders which occur in such situations. In fact, one can almost imagine the author exclaim as he writes, as is attested by his comment “The incredible richness of convective modes”—and this is only about RayleighBenard convection with rotation. The range of scales presented is truly prodigious— from giant gas planets and atmospheric phenomena to crystal growth. The amount of material presented is therefore quite large, so to keep the manuscript to a reasonable length, it seems to me that the author has had to condense the explanations to the bare minimum. As a consequence it makes for difficult reading. Should the reader put the book down for a few days before resuming reading, the lack of a nomenclature and the use of the same symbol for a number of variables as well as the use of many acronyms make it even more difficult to read. The first chapter, entitled “Equations, General Concepts and Nondimensional Numbers,” lays the foundation for the remainder of the book. The remaining chapters are entitled: Rayleigh-Benard Convection with Rotation; Spherical Shells, Rossby Waves and Centrifugally Driven Thermal Convection; The Baroclinic Problem; The Quasi-Geostrophic Problem; Planetary Patterns; Surface Tension Driven Flows in Rotating Fluids; Crystal Growth from the Melt and Rotating Machinery; Rotating Magnetic Fields; and Angular Vibrations and Rocking Motion. The main emphasis of the book is on the stability of the flows with the last three chapters directed more to applications. The coverage, albeit briefly presented at times, is generally very extensive as the 37 pages of references clearly confirm. There is so much in the book that it is impossible to discuss any one topic in particular, so I will confine myself to a couple of remarks about fundamentals. The author deplores the fact that because he had to restrict the length of the book, a “cross-link between macroand micro-scales” has not been presented so that “the Navier-Stokes and energy equations are presented directly.” This is not an elementary textbook and would, I expect, be intended for research students and researchers, and I see no need for such a development in the pages of this book, par
{"title":"BOOK REVIEW: ROTATING THERMAL FLOWS IN NATURAL AND INDUSTRIAL PROCESSES","authors":"J. Reizes","doi":"10.1615/COMPUTTHERMALSCIEN.2014010121","DOIUrl":"https://doi.org/10.1615/COMPUTTHERMALSCIEN.2014010121","url":null,"abstract":"As with Lappa’s earlier book, “Thermal Convection: Patterns, Evolution and Stability” (Wiley, 2010), this book is not about heat transfer. The focus of the book is about the fluid mechanics of flows in rotating systems in which thermal gradients are present. Again, similar to the previous volume, the emphasis is on the physics and the mathematical treatments of such flows; in particular the stability of these flows. There is therefore no discussion of either numerical or experimental procedures. The results of computational simulations and complex experiments are used to illustrate and develop the ideas being discussed. This book is hardly an introduction to thermal flows in rotating systems and is not designed for a novice in the subject. Rather, it is a voyage through the physics of a myriad of wonders which occur in such situations. In fact, one can almost imagine the author exclaim as he writes, as is attested by his comment “The incredible richness of convective modes”—and this is only about RayleighBenard convection with rotation. The range of scales presented is truly prodigious— from giant gas planets and atmospheric phenomena to crystal growth. The amount of material presented is therefore quite large, so to keep the manuscript to a reasonable length, it seems to me that the author has had to condense the explanations to the bare minimum. As a consequence it makes for difficult reading. Should the reader put the book down for a few days before resuming reading, the lack of a nomenclature and the use of the same symbol for a number of variables as well as the use of many acronyms make it even more difficult to read. The first chapter, entitled “Equations, General Concepts and Nondimensional Numbers,” lays the foundation for the remainder of the book. The remaining chapters are entitled: Rayleigh-Benard Convection with Rotation; Spherical Shells, Rossby Waves and Centrifugally Driven Thermal Convection; The Baroclinic Problem; The Quasi-Geostrophic Problem; Planetary Patterns; Surface Tension Driven Flows in Rotating Fluids; Crystal Growth from the Melt and Rotating Machinery; Rotating Magnetic Fields; and Angular Vibrations and Rocking Motion. The main emphasis of the book is on the stability of the flows with the last three chapters directed more to applications. The coverage, albeit briefly presented at times, is generally very extensive as the 37 pages of references clearly confirm. There is so much in the book that it is impossible to discuss any one topic in particular, so I will confine myself to a couple of remarks about fundamentals. The author deplores the fact that because he had to restrict the length of the book, a “cross-link between macroand micro-scales” has not been presented so that “the Navier-Stokes and energy equations are presented directly.” This is not an elementary textbook and would, I expect, be intended for research students and researchers, and I see no need for such a development in the pages of this book, par","PeriodicalId":45052,"journal":{"name":"Computational Thermal Sciences","volume":"6 1","pages":"41-42"},"PeriodicalIF":1.5,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1615/COMPUTTHERMALSCIEN.2014010121","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67420190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.1615/COMPUTTHERMALSCIEN.2014010287
C. Spitas
Engineering and technological advancement typically relies on either one of two distinguishable modes: Inspired synthesis of known phenomena, typically termed “design and development”, and insightful heuresisand exploitation of new phenomena by means of analyzing and abstracting (modeling) otherwise known phenomena and their couplings (Spitas, 2011), typically the object of “research and development”. Although the significance of existing knowledge and the “shock of the old” (Edgerton, 2006) in the first case must never be underestimated, it is the latter case that inspires this special section of the journal, which focuses on emerging scientific insights into coupled heat and mass transfer in selected different technological contexts. Each of these insights is meant to constitute an opportunity in the developing state of the art. To this end a set of four invited papers are presented, dealing with computational models for fuel production by gasification of biomass, fine mist cooling of high tem-
{"title":"Preface: Special section on transport phenomena","authors":"C. Spitas","doi":"10.1615/COMPUTTHERMALSCIEN.2014010287","DOIUrl":"https://doi.org/10.1615/COMPUTTHERMALSCIEN.2014010287","url":null,"abstract":"Engineering and technological advancement typically relies on either one of two distinguishable modes: Inspired synthesis of known phenomena, typically termed “design and development”, and insightful heuresisand exploitation of new phenomena by means of analyzing and abstracting (modeling) otherwise known phenomena and their couplings (Spitas, 2011), typically the object of “research and development”. Although the significance of existing knowledge and the “shock of the old” (Edgerton, 2006) in the first case must never be underestimated, it is the latter case that inspires this special section of the journal, which focuses on emerging scientific insights into coupled heat and mass transfer in selected different technological contexts. Each of these insights is meant to constitute an opportunity in the developing state of the art. To this end a set of four invited papers are presented, dealing with computational models for fuel production by gasification of biomass, fine mist cooling of high tem-","PeriodicalId":45052,"journal":{"name":"Computational Thermal Sciences","volume":"6 1","pages":"45"},"PeriodicalIF":1.5,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1615/COMPUTTHERMALSCIEN.2014010287","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67420224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.1615/COMPUTTHERMALSCIEN.2014006371
T. Tsukahara, T. Kawase, Y. Kawaguchi
{"title":"HEAT TRANSFER IN A VISCOELASTIC ORIFICE FLOW AT LOW TO MODERATE REYNOLDS NUMBERS","authors":"T. Tsukahara, T. Kawase, Y. Kawaguchi","doi":"10.1615/COMPUTTHERMALSCIEN.2014006371","DOIUrl":"https://doi.org/10.1615/COMPUTTHERMALSCIEN.2014006371","url":null,"abstract":"","PeriodicalId":45052,"journal":{"name":"Computational Thermal Sciences","volume":"6 1","pages":"79-90"},"PeriodicalIF":1.5,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67419736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.1615/COMPUTTHERMALSCIEN.2014007841
S. Kar, P. Rath
{"title":"A FIXED-GRID BASED MIXTURE MODEL FOR PULSED LASER PHASE CHANGE PROCESS","authors":"S. Kar, P. Rath","doi":"10.1615/COMPUTTHERMALSCIEN.2014007841","DOIUrl":"https://doi.org/10.1615/COMPUTTHERMALSCIEN.2014007841","url":null,"abstract":"","PeriodicalId":45052,"journal":{"name":"Computational Thermal Sciences","volume":"6 1","pages":"13-26"},"PeriodicalIF":1.5,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67420174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-05-17DOI: 10.1615/COMPUTTHERMALSCIEN.2013006169
D. Ameur, I. Raspo
The Poiseuille-Rayleigh-Benard problem, involving the onset of thermoconvective structures in channels heated from below, was the subject of many theoretical, numerical and experimental studies for incompressible flows or perfect gas. However, to the authors' knowledge, this problem was never studied for supercritical fluids. The objective of this paper is to study the influence of the specific properties of such fluids on thermoconvective instability phenomena compared with those observed in the perfect gas case. The effect of the distance to the critical point is also investigated. The numerical approach used is based on the Navier-Stokes equations in the framework of the low Mach number approximation.
{"title":"Numerical Simulation of the Poiseuille-Rayleigh-Bénard Instability for a Supercritical Fluid in a Mini-channel","authors":"D. Ameur, I. Raspo","doi":"10.1615/COMPUTTHERMALSCIEN.2013006169","DOIUrl":"https://doi.org/10.1615/COMPUTTHERMALSCIEN.2013006169","url":null,"abstract":"The Poiseuille-Rayleigh-Benard problem, involving the onset of thermoconvective structures in channels heated from below, was the subject of many theoretical, numerical and experimental studies for incompressible flows or perfect gas. However, to the authors' knowledge, this problem was never studied for supercritical fluids. The objective of this paper is to study the influence of the specific properties of such fluids on thermoconvective instability phenomena compared with those observed in the perfect gas case. The effect of the distance to the critical point is also investigated. The numerical approach used is based on the Navier-Stokes equations in the framework of the low Mach number approximation.","PeriodicalId":45052,"journal":{"name":"Computational Thermal Sciences","volume":"5 1","pages":"107-118"},"PeriodicalIF":1.5,"publicationDate":"2013-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67419436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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