... K(x, y) using temperature measurements inside the spatial domain, considering the other parameter involved in the model as input data. Thermal conductivity Milling operations Chebyshev pseudospectral method Levenberg–Marquardt method CAPES and FAPESC, Brazil 88887.178114...

... at fixed temperature with varying concentration and flow rate is used in cold side tank as coolant. Findings The numerical and experimental results were compared and found that both results were in good agreement. The results showed ∼13% improvement in thermal conductivity, ∼14% heat transfer rate (HTR...

... the mixture thermal conductivity at dissimilar temperatures and nanoparticle concentrations, in the examined domains. Design/methodology/approach WO3 nanoparticles are dispersed in the deionized water to produce a homogeneous mixture at various nanoparticles mass fractions of 0.1, 0.5, 1.0 and 5.0 Wt...

...Anna Ivanova; Stanislaw Migorski; Rafal Wyczolkowski; Dmitry Ivanov Purpose This paper aims to considered the problem of identification of temperature-dependent thermal conductivity in the nonstationary, nonlinear heat equation. To describe the heat transfer in the furnace charge occupied...

...Zhe Tian; Seyed Amin Bagherzadeh; Kamal Ghani; Arash Karimipour; Ali Abdollahi; Mehrdad Bahrami; Mohammad Reza Safaei Purpose This paper aims to propose a new nonlinear function estimation fuzzy system as a novel statistical approach to estimate nanofluids’ thermal conductivity. Design...

... classes such as: λ = Relaxation time τ = Extra stress tensor p = Pressure x, y = Space coordinates κ = Thermal conductivity C_p = Specific heat η = Similarity variable ψ...

...R. Askari; M.F. Ikram; S. H. Hejazi Purpose Thermal conduction anisotropy, which is defined by the dependency of thermal conductivity on direction, is an important parameter in many engineering and research studies such as the design of nuclear waste depositional sites. In this context...

...Wojciech Piotr Adamczyk; Ziemowit Ostrowski Purpose Prompted by the reliability and robustness of the previously proposed method of non-destructive measurement of thermal conductivity (TC) for anisotropic materials, the enhanced approach is presented in this study. The main improvement lies...

... simulation Ballistic transport Phonon heat conduction models Thermal conductivity The continued trend in miniaturization of devices and the rapid progress in the design and synthesis of materials and structures provides the impetus for an improved understanding of heat transport across a broad...

...Ruey‐Hor Yen; Chien‐Yu Chen; Ching‐Tang Huang; Pei‐Jing Chen Purpose This work seeks to analyze the heat transfer phenomena of anisotropic thermal conductivity fabrics containing electric conductive yarns. Design/methodology/approach A numerical program, based on a spectral element method...

..._∞⁴ N=number of heat source L=enclosure width (m) k=thermal conductivity (W/m K) H=enclosure height (m) g=acceleration due to gravity (m/s^{2) F_ij=configuration factor D=heater characteristic size (m) C_p=heat capacity (J/kg K) A=aspect ratio}...

... a “nanofluid‐oriented” model for the calculation of the effective thermal conductivity (Xu‐Yu‐Zou‐Xu's model) and the effective dynamic viscosity (Jang‐Lee‐Hwang‐Choi's model). Another motivation is the numerical solution of the equations of the flow with a meshless method. Design/methodology/approach...

...D.D. Ganji; M. Rahimi; M. Rahgoshay Purpose The purpose of this paper is to determine the fin efficiency of convective straight fins with temperature dependent thermal conductivity by using Homotopy Perturbation Method. Design/methodology/approach Most engineering problems, especially heat...

... equation in the sub‐particles in the material. In the presented meshless method due to elimination of domain integration the computational efforts are decreased substantially. Findings Numerical results are presented for temperature distribution, heat flux and thermal conductivity. Numerical results...

... and Xenon. It is observed that the gas thermal conductivity plays an important role in the shock wave strength. A good agreement is observed by comparison of the results with the experimental data. Originality/value The effect of heat transfer on the emitted shock wave strength has not been studied...

...P.R. Sharma; Gurminder Singh Purpose Physical properties of a viscous fluid, e.g. viscosity and thermal conductivity change with temperature and in most of the studies concerned with natural convection, generally, the simultaneous effect of temperature dependent viscosity, thermal conductivity...

..., but only requires a set of nodes for the construction of approximation function. Findings The equivalent thermal conductivity of the composite has been calculated, and plotted against nanotube length, nanotube radius, RVE length, and RVE radius. Temperature distribution has been obtained and plotted...

...Christianne V.D.R. Anderson; Kumar K. Tamma We first provide an overview of some predominant theoretical methods currently used for predicting thermal conductivity of thin dielectric films: the equation of radiative transfer, the temperature‐dependent thermal conductivity theories based...