Abstract. In this work, we study the unsteady axisymmetric mixed convection boundary layer flow and heat transfer of non-Newtonian power law fluid over a cylinder. Different from most classical works, the temperature dependent variable fluid viscosity and thermal conductivity are taken into account in highly coupled velocity and temperature fields. The motion of the fluid can be modeled by a ti...

The loss of energy especially in industrial and residential buildings is one of the main reasons of increased energy consumption. Improving the thermal insulation properties of materials is a fundamental method for reducing the energy losses. Polymeric foams are introduced as materials with excellent thermal insulation properties for this purpose. In the present study, a deep theoretical invest...

Using non-equilibriummolecular dynamics methods, the analysis of geometry and temperature dependent thermal conductivities of diamond nanowires is carried out. It is found that at the same temperature conditions, thermal conductivities of diamond nanowires increase with increasing lengths, ranging from 20 to 350 nm and cross-sectional areas ranging from 2 to 30 nm. At the same length, temperatu...

Given their amphiphilic nature and chemical structure, phospholipids exhibit a strong thermotropic and lyotropic phase behaviour in an aqueous environment. Around the phase transition temperature, phospholipids transform from a gel-like state to a fluid crystalline structure. In this transition, many key characteristics of the lipid bilayers such as structure and thermal properties alter. In th...

With the growing interest in low dimensional materials, MXenes have also attracted considerable attention recently. In this work, the thermal and electrical properties of oxygen-functionalized M2CO2 (M = Ti, Zr, Hf) MXenes are investigated using first-principles calculations. Hf2CO2 is determined to exhibit a thermal conductivity better than MoS2 and phosphorene. The room-temperature thermal co...

Experimental study of effective thermal conductivity of ZnO/EG nanofluid is presented in thisresearch. The nanofluid was prepared by dispersing Zno nanoparticles in ethylene glycol using asonicator and adding surfactant. Ethylene glycol based nanofluid containing ZnO nanoparticlewith a nominal diameter of 18 nm at different solid volume fractions (very low to high) atvarious temperatures was ex...

Technetium metal and Tc-Ru alloys were characterised to build a database of the Tc metal target for transmutation. The lattice parameters of Tc-Ru alloys including Tc and Ru metals measured by X-ray diffraction decrease with increasing Ru concentration. The thermal conductivity of Tc-Ru alloys including Tc and Ru metals was determined by the thermal diffusivity measured by the laser flash metho...

Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Nanostructured materials exhibit low thermal conductivity because of the additional scattering due to phonon-bounda...

Nanostructured materials exhibit low thermal conductivity because of the additional scattering due to phononboundary interactions. As these interactions are highly sensitive to the mean free path (MFP) of phonons, MFP distributions in nanostructures can be dramatically distorted relative to bulk. Here we calculate the MFP distribution in periodic nanoporous Si for different temperatures, using ...

This paper presents a compact analytical model for estimating the temperature rise of multilevel ULSI interconnects incorporating via effect. For the first time, an analytical expression is derived for the via correction factor, η, which quantifies the effect of via separation on the effective thermal conductivity of ILD (inter-layer dielectrics), k ILD,effective, with k ILD,effective = k ILD/η...