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Keywords: thermal conductivity
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Journal Articles
Article Type: Research-Article
J. Heat Transfer. July 2022, 144(7): 071401.
Paper No: HT-21-1638
Published Online: May 11, 2022
... > ( ε 1 l 1 0.05 π ε 2 ) 2 For low effusivity samples, A  =   0.1 better predicts the required t min . References [1] Emanuel , M. , 2006 , “ Effusivity Sensor Package (ESP) System for Process Monitoring and Control ,” Thermal Conductivity 2/Thermal...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. February 2022, 144(2): 021602.
Paper No: HT-21-1402
Published Online: December 21, 2021
... at the bottom of the pipe. The mean flow velocity and the heat transfer coefficient decrease along the condensation length. The local results demonstrate that the heat transfer coefficient is not merely affected by the condensate film thickness but also by the effective thermal conductivity of the flow...
Includes: Supplementary data
Journal Articles
Article Type: Research-Article
J. Heat Transfer. February 2022, 144(2): 023501.
Paper No: HT-21-1088
Published Online: December 20, 2021
...Xiaojian Wang; Liangbi Wang The most common nongranular fillers are sheet and fiber. When they are distributed along the heat flux direction, the thermal conductivity of the composite increases greatly. Meanwhile, the filler contact also has a large effect on the thermal conductivity. However...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. January 2022, 144(1): 013501.
Paper No: HT-20-1525
Published Online: November 8, 2021
... of the thermal conductivity are sensitive to both the pump and probe laser spot sizes, while analytical solutions (based on Hankel transform) cannot isolate the two effects. However, for the same effective (combined) spot size, the two solutions are found to be in excellent agreement. If the substrate...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. July 2021, 143(7): 072102.
Paper No: HT-20-1504
Published Online: May 17, 2021
... of the composite. This value has the meaning of “dynamic effective thermal diffusivity.” Afterward, the effective thermal conductivity ( λ eff ) is calculated from the dynamic effective thermal diffusivity, equivalent heat capacity, and density of the composite. The results of this methodology are compared...
Includes: Supplementary data
Journal Articles
Article Type: Research-Article
J. Heat Transfer. April 2021, 143(4): 042102.
Paper No: HT-20-1479
Published Online: February 23, 2021
.... The solutions of governing equations show that the transfer of heat in a porous rod is not only due to the conduction but also produced by the local particle displacement phenomenon. It is observed that the time-averaged transfer of heat depends on the circular frequency, porosity, thermal conductivity, thermal...
Includes: Supplementary data
Journal Articles
Article Type: Technical Briefs
J. Heat Transfer. March 2021, 143(3): 034502.
Paper No: HT-20-1367
Published Online: January 28, 2021
... by a thermal conductivity that can reach lower values than any other material. Our aim was to explain the causes of the super-insulation of this material with the use of a calculating method of conductive heat transfer flux in an aerogel structure and determine the equivalent thermal conductivity...
Journal Articles
Article Type: Technical Briefs
J. Heat Transfer. September 2020, 142(9): 094502.
Paper No: HT-20-1199
Published Online: July 8, 2020
... strategy has been established to control the anisotropy of its effective thermal conductivity tensor by deforming the structure according to its specific heat transfer application. The solution surface of flat triangle was constructed in the space with three coordinate axes being the principal components...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. March 2020, 142(3): 032503.
Paper No: HT-19-1645
Published Online: January 29, 2020
...Mohammad Bagheri Motlagh; Mohammad Kalteh In this paper, molecular dynamics simulation is used to investigate the effect of copper and argon nanochannels size on the thermal conductivity of argon. Thermal conductivity is calculated by nonequilibrium molecular dynamics (NEMD) simulation. Simulations...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. December 2019, 141(12): 121401.
Paper No: HT-19-1412
Published Online: October 8, 2019
...-mail:  avr.emanuel@gmail.com 14 07 2019 27 08 2019 00 00 0000 08 10 2019 circular heat source CHS composite Hankel Laplace thermal conductivity thermal diffusivity The problem of a three-dimensional (3D) heat flow from a finite circular heat source (CHS) has...
Journal Articles
Article Type: Technical Briefs
J. Heat Transfer. April 2019, 141(4): 044501.
Paper No: HT-18-1399
Published Online: February 25, 2019
...C. G. Subramaniam A generalized effective medium theory (EMT) is proposed to account for the fractal structure of the dispersed phase in a dispersing medium under the dilute limit. The thermal conductivity of nanofluids with fractal aggregates is studied using the proposed model. Fractal aggregates...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. March 2019, 141(3): 032401.
Paper No: HT-17-1735
Published Online: January 14, 2019
...Hamid Loulijat; Hicham Zerradi In this work, the equilibrium molecular dynamics (MD) simulation combined with the Green–Kubo method is employed to calculate the thermal conductivity and investigate the impact of the liquid layer around the solid nanoparticle (NP) in enhancing thermal conductivity...
Journal Articles
Article Type: Technical Briefs
J. Heat Transfer. February 2019, 141(2): 024504.
Paper No: HT-18-1673
Published Online: December 13, 2018
...X. Bai; A. Nakayama An analytical and numerical study was conducted for estimation of the effective thermal conductivities of curved metal frame core structures, which can replace metal foams, in views of their advantages over the metal foams for both load bearing and heat dissipation...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. October 2015, 137(10): 101601.
Paper No: HT-14-1118
Published Online: October 1, 2015
... 02 06 2015 This paper reports on a new application of the thermal probe in nonlinear systems. Whereas the thermal probe has been originally developed to determine the thermal conductivity in linear cases (where the thermophysical properties are considered independent of the temperature...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. August 2015, 137(8): 081601.
Paper No: HT-13-1325
Published Online: August 1, 2015
... in an additional possible thermal conductivity of at most 0.75 mW/m · K. For the case of insulation with a thickness of 1 cm, the material is almost entirely optically thick. The resulting Rosseland mean extinction coefficient is 2400 m −1 , similar to the value obtained by Rettelbach et al. [ 15 ] of 3750 m −1...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. July 2015, 137(7): 072301.
Paper No: HT-13-1601
Published Online: March 24, 2015
... manuscript received October 27, 2014; published online March 24, 2015. Assoc. Editor: Andrey Kuznetsov. 26 11 2013 27 10 2014 colloids constitutional supercooling convection freezing nanoparticles nanostructures phase change solidification suspensions thermal conductivity...
Journal Articles
Article Type: Technical Briefs
J. Heat Transfer. March 2015, 137(3): 034501.
Paper No: HT-13-1360
Published Online: March 1, 2015
.... Results show that randomness—the way in which fibers are distributed inside the matrix—has a significant effect on the thermal conductivity of CNT composites. Results of this study were compared using the analytical Xue and Nan model and good agreement was observed. thermal conductivity carbon...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. January 2015, 137(1): 012401.
Paper No: HT-13-1642
Published Online: November 5, 2014
... considerable effect on their effective properties [ 24–28 ]. It may be worth mentioning that the previously published work by the present authors [ 21 ] is concerned with the estimation of the effective thermal conductivities of the FFRC containing straight CNTs. Since the distribution pattern and waviness...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. June 2014, 136(6): 061301.
Paper No: HT-13-1291
Published Online: March 10, 2014
... dispersive spectrometry was used to infer the absence of interstitial elements. The thermal conductivity of the composite and the interface thermal conductance between titanium and silicon or titanium and graphene platelets was determined by three-omega and transient thermo reflectance (TTR) techniques...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. March 2014, 136(3): 031303.
Paper No: HT-13-1116
Published Online: November 28, 2013
.... Assoc. Editor: Oronzio Manca. 06 03 2013 05 08 2013 The thermal conductivity of the earth materials conditions their ability as thermal isolator and its heating capacity, which has a direct impact on the energy consumption of the buildings built with these materials. Two original...