...Tian Xiao; Liu Lu; Chenlei Yu; Sandra K. S. Boetcher; Xiaohu Yang; Moxiao Li; Tian Jian Lu Coating the hollow ligaments of open-cell (fluid-through) metallic foams (MFs) fabricated via the sintering route with a thin layer of graphene can improve the effective thermal conductivity (ETC) of the foam...

.... factors. In order to address this issue, an innovative method is employed to estimate the effective thermal conductivity (ETC) of multilayer materials considering thermal contact resistance (TCR) between layers, and the equivalence performance is investigated by solving three-dimensional inverse heat...

...Hao Wu; Nan Gui; Xingtuan Yang; Jiyuan Tu; Shengyao Jiang The core of high-temperature gas-cooled reactor is a dense pebble bed of random packing filled with monosized fuel spheres. Subcell radiation model (SCM) is a generic analytical approach to calculate effective thermal conductivity (ETC...

...Hao Wu; Nan Gui; Xingtuan Yang; Jiyuan Tu; Shengyao Jiang Radiative and conductive heat transfer is fairly important in the nuclear pebble bed. A continuum model is proposed here to derive the effective thermal conductivity (ETC) of pebble bed. It is a physics-based equation determined...

..., viz. , effective thermal conductivity and permeability, is analyzed. The effective thermal conductivity increases monotonically as either the sintering time or temperature is increased. Permeability is observed to increase with particle size and porosity. As sintering progresses, the slight increase...

... ( K ) 300 This calculation corresponds to α = 0 . 85 , which is in good agreement with the fact that the accomodation coefficient for air is close to unity for most surfaces [ 26 ]. The solid contribution λ s to the effective thermal conductivity...

... thermal conductivity metal hydride carbon heat and mass transfer hydrogen storage effective thermal conductivity Thorough heat and mass transfer analysis is essential to design the storage device for specified hydrogen storage capacity and charging/discharging rates. However...

... surfaces within the bed. The Zehner–Schlünder correlation with modifications similar to those used in the thermix code calculation [( 17 )] was employed to determine the effective thermal conductivity k eff for the heat transfer between the pebbles. Figure 5 shows a simplified network...

... of such devices. Three sintered copper wick samples employed in commercial heat pipes are characterized in this work in terms of their thermal transport properties––porosity, effective thermal conductivity, permeability, and interfacial heat transfer coefficient. The commercially available samples of nearly...

... centrifuge. It was found that the heat pipe operated and performed near-independent of the investigated hypergravity loading up to 10 g. Results show that at ten times the acceleration due to gravity (10 g), the effective thermal conductivity was almost constant and even slightly increased which is very...

... , “ Anomalously Increased Effective Thermal Conductivities of Ethylene Glycol-Based Nanofluids Containing Copper Nanoparticles ,” Appl. Phys. Lett. 0003-6951 , 78 , pp. 718 – 720 . 10.1063/1.1341218 Choi , S. U. S. , Zhang , Z. G. , Yu , W. , Lockwood , F. E. , and Grulke , E...

... , C. H. , Williams , W. , Buongiorno , J. , Hu , L. W. , and Peterson , G. P. , 2008 , “ Transient and Steady-State Experimental Comparison Study of Effective Thermal Conductivity of Al2O3/Water Nanofluids ,” ASME J. Heat Transfer 0022-1481 , 130 , p. 040301 . 10.1115...

... flow ( Δ P l ) , and hydrostatic pressure loss due to the unfavorable slopes of the device in the gravity field ( Δ P g ) . Experimental and predicted values for effective thermal conductivity of water saturated wick (powder: monoporous, copper, 100–200 mesh...

... of aqueous suspensions of nanodiamond particles. Experimental and theoretical methods are employed to obtain the effective thermal conductivity, viscosity, and convective heat transfer coefficient. Consideration is given to the effect of particle concentration and Reynolds number on heat transfer enhancement...

... a transient hot-wire method. The arguments that the methodology is the cause of the observed enhancement of nanofluids effective thermal conductivity are evaluated and resolved. It is clear from the results that at room temperature, both the steady-state cut-bar and transient hot-wire methods result in nearly...

...Jörg Petrasch; Birte Schrader; Peter Wyss; Aldo Steinfeld The effective thermal conductivity of reticulate porous ceramics (RPCs) is determined based on the 3D digital representation of their pore-level geometry obtained by high-resolution multiscale computer tomography. Separation of scales...

...H. T. Aichlmayr; F. A. Kulacki An experimental technique for measuring the effective thermal conductivity of saturated porous media is presented. The experimental method is based on the transient heating of a semi-infinite cylinder by a constant heat flux at the boundary. The data reduction...

... for estimating the effective thermal conductivity of suspensions that go back more than one century (Maxwell, J.C., 1891, Treatise on Electricity and Magnetism ). Nevertheless, other possible explanations have to be accounted for and investigated in more detail prior to reaching a final conclusion on the former...