A correction to this paper has been published: https://doi.org/10.1007/s10765-021-02874-1

Graphene nanoplatelets (GNPs) have been widely used as an effective reinforcing element in composite coatings owing to its intrinsic ultrahigh thermal and mechanical properties. This study aims to investigate the role of GNPs concentration on pool boiling performance of R-134a on Cu matrix nanocomposite coatings. Cu-GNPs nanocomposite coatings were synthesized on a plain Cu sample via a two-step electrodeposition

In this study, the reverse nonequilibrium molecular dynamics (RNEMD) method is applied to compute the thermal conductivity of nanofluid (argon-graphene) and to examine the effects of volume fraction and size of graphene nanosheets on thermal conductivity enhancement by varying the concentration graphene in liquid argon and the graphene nanosheets area, respectively. Furthermore, the thermal conductivities

R134a, commonly used for automotive air conditioning, will be phased out due to its high global warming potential, while R1234yf/R290 and R1234yf/R600a were considered as two potential alternatives owing to their excellent environmental characteristics. In this work, the thermophysical properties and cycle performances of the above refrigerants were investigated. The vapor–liquid equilibrium predicted

A database of the thermal conductivity of fused quartz was developed using the KD2 Pro thermal properties analyzer. The database contains the thermal conductivity data of fused quartz with changes in soil porosity and temperatures ranging from 5 ℃ to 45 ℃. The measured data show that the thermal conductivity increases with increasing temperature under dry conditions. Five empirical models and three

A complete theoretical analysis of the fluid and solid dynamics of the torsional quartz crystal viscometer is presented which for the first time, establishes a firm theoretical basis for two working equations whereby the viscosity of a fluid may be determined from measurements of the resonant frequency of the crystal and the width of the resonance when immersed in the fluid. Modern instrumentation

A correction to this paper has been published: https://doi.org/10.1007/s10765-021-02870-5

This study investigates the determining parameters of thermal comfort of office in an arid hot-arid environment of Bechar, located in the northwestern region of Algeria, in which the vertical walls of the room and the roof are subjected to solar irradiations and the floor is considered to be adiabatic. The solar flux is calculated by the ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning

The laser thermal lens spectroscopy (TLS) was used to measure the thermo-optical parameters of alcohols(1)–trichloromethane(2) binary mixtures with high accuracy. Using this spectroscopic method, the thermal lens characteristic time (tc), thermal diffusivity (Dth), thermal conductivity (k), thermo-optic coefficient (dn/dT), and the refractive index changes with the sample deposited heat (dn/dQ) were

We present a new wide-ranging correlation for the viscosity of ethane-1,2-diol (ethylene glycol) based on critically evaluated experimental data. The correlation is designed to be used with an existing equation of state, and it is valid from the triple point to 465 K, at pressures up to 100 MPa. The estimated uncertainty is 4.9 % (at the 95 % confidence level), except in the dilute-gas region which

The International Temperature Scale of 1990 (ITS-90) is commonly expressed in terms of the ratio of the resistance of a standard platinum resistance thermometer (SPRT) to the resistance at the triple point of water. Most high-precision thermometry relies on the alternating current (AC) method due to its manifold practical benefits. However, there are some negative consequences of using AC methods,

In this work, the temperature response characteristics of thin-walled and large aspect ratio steel tubes under oil pool fire load conditions were studied. In order to obtain a reliable temperature distribution value, combustion tests were carried out in parallel with a numerical simulation study on Q345B steel circular tube members with the wall thickness of 5 mm. The circular tubes were tested under

Assorted potential thermal insulators are fabricated nowadays for possible applications in various fields. Unfortunately, drawbacks like selective suitability, unavailability, and expensiveness hinder the progress in the usage of several devices that are efficient and suitable for probing the thermal conductivity values of such materials. Though the observed challenges can be overcome by using the

In the present paper, thermal properties of K2 diatomic molecule were theoretically investigated. To this goal, we have used the generalized Mobius square (GMS) potential and obtained the rotational–vibrational energy levels of the GMS potential analytically. The Schrödinger equation (SE) was solved by considering a Pekeris-type approximation framework and a suitable coordinate transformation. Using

Due to the flexibility and lightness, flexible thermoelectric (TE) technology shows great potential in the field of renewable energy and low-temperature waste heat collection. In recent years, a lot of efforts have been made to improve the efficiency of flexible TE technology, such as synthesizing high-performance flexible TE materials, improving the structure of flexible thermoelectric generators

In this article, we present new data on the non-stationary heat transfer in supercritical water at different heating regimes with characteristic times from 5 ms to 15 ms. The pressure, being the parameter of the experiment, was varied from the critical pressure pc up to 4.5 p/pc (namely, up to 1 kbar). These data serve as a significant addition to the well-known picture of supercritical heat transfer

The mode mismatch dual-beam thermal lens technique is a sensitive tool for studying the nanofluids’ thermal diffusivity in thermal engineering. The work reports the low-temperature green synthesis of hafnium carbide (HfC) using rice flour as a natural carbon precursor and its potential in heat transfer nanofluids by studying the concentration-dependent thermal diffusivity. The structure characterisations

In this work, the combination of the gradient theory and cubic plus association equation of state has been applied to describing the interfacial density profiles and surface tensions of \(\hbox {CO}_{2}\) + \(\hbox {H}_{2}\)O and \(\hbox {H}_{2}\)S + \(\hbox {H}_{2}\)O systems. The ranges of temperature and pressure are (297.9–469.4) K and (1–691.4) bar, respectively. Different cross-association schemes

The thermal properties of graphene oxide (GO) nanoparticles’ colloidal suspensions prepared using the microwave-assisted hydrothermal method were determined. The mode-mismatched dual-beam thermal lens technique was employed to measure the thermal diffusivity of GO nanoparticles for different concentrations in the base fluid. By fitting the experimental data to the theoretical expression, the characteristic

It is a feasible way to use constructal filler to increase the effective thermal conductivity of polymer. However, the combined effect of filler constructal-shape, contact, anisotropy and interface thermal resistance on the effective thermal conductivity of the composites has not been considered, and the heat transfer mechanisms remain unclear. In this study, these effects are evaluated at the same

An equation of state that predicts the thermodynamic behavior of propane is formulated. This equation takes into account the global behavior that includes the singular thermodynamic behavior asymptotically close to the critical point and the crossover to the regular thermodynamic behavior far away from the critical point. The formulated equation based on the transformation of a truncated classical

Date palm fiber bundle includes lumens in solid region, which present low thermal conductivity than that of fiber bundle. In this work, the transverse thermal conductivity of date palm fiber bundle was determined by numerical software to investigate the relation between the bundle fiber and the solid region thermophysical properties. Therefore, the results determined from the numerical investigation

Hemp based composites have been preferred in insulation applications in the last decade, especially thanks to it is superior thermophysical properties. These composites consist of natural material and are widely bonded with lime plaster. Therefore, it is accepted as an environmentally friendly material. In this study, various composites containing different types and sizes of hemp hurd particles were

Exergic analysis has become an effective method of thermodynamic behavior evaluation for power systems. The current study focuses on an integrated solar–gas combined cycle (ISCC) system for electric power generation and refrigeration. Exergic analysis of the ISCC system is conducted by using the gray-box model as well as the Ebsilon software. The results show that under the rated working condition

In this experimental study, nanofluids based on polyethylene-glycol PEG 400 enhanced with zinc and aluminum oxide nanoparticles were studied in terms of pH and electrical conductivity. The nanofluids were found to be stable with a pH in the range 7.45 to 8.90 at ambient temperature. Electrical conductivity was evaluated both at ambient temperature and at heating up to 60 °C and results showed that

A correction to this paper has been published: https://doi.org/10.1007/s10765-021-02847-4

ZnO/Graphene heterostructures combine the unique properties of graphene and zinc oxide. The advantages of this combination allow the development of various photoelectric devices that have exhibited excellent performance and attracted increasing interest. In this work, we investigated the structural, electronic, and thermoelectric properties of graphene (G), zinc oxide (ZnO) and ZnO/Graphene (ZnO/G)

This experimental assessment aims to study the impact of twisted tape insert on city gas station (CGS) heaters performance. The interesting point in this study is that the unflavored pressure drop in many cases of using tube inserts is quite favor in this case. In other words, this insert is used in a station whose primary duty is to heat the natural gas and reduce its pressure, and the insert does

Decreasing the time required for accurate thermodynamic property measurements is extremely desirable for model development that can respond to the needs of science and industry within a short time frame. Here, we demonstrate the application of optimal experimental design to measurements of thermodynamic properties. The technique is explored using the fitting of a Schilling-type equation from published

The paper discusses the dilution concentration effect on the magnetic properties of the three nano-Heusler Ru2MnX (X = Nb, Ta, V) compounds using the Blume–Capel Ising model. The studied nano-Heusler compounds are composed of a mixed atom spins. In this work, we use Monte Carlo simulations under the Metropolis algorithm. The diluted effects on the magnetic properties of the three nano-Heusler compounds

Densities and viscosities for the binary system of tetraethylene glycol (1) + water (2) at T = (298.15 to 323.15) K were measured as a function of composition under atmospheric pressure. The excess properties, including excess molar volumes (\(V_{{\text{M}}}^{{\text{E}}}\)), viscosity deviations (Δη), and the excess Gibbs free energy of activation for viscous flow (ΔG*E) were calculated by using density

Directional solidification of Al–Cu–Ti (Al–33wt%Cu–0.1wt%Ti) eutectic alloy was done with a growth rate range (V = 8.58 to 2038.65 µm⋅s−1) at a temperature gradient of 6.45 K⋅mm−1 using Bridgman-type directional solidification furnace. The measurements of thermal conductivity (K) and electrical resistivity (\(\rho\)) for the Al–Cu–Ti alloy solidified with the different values of V were made by the

The thermal diffusivity of gas-saturated glass sieves (frits) of porosities between 20 % and 48 % is presented as measured at room temperature and ambient pressure. The saturants cover a range in thermal diffusivity from 20.63 × 10–6 m2⋅s−1 to 172 × 10–6 m2⋅s−1. The experiments were carried out using a transient hot-bridge instrument of an expanded uncertainty of 5 % to 10 %. It turned out that all

The high pressure density data of six substances which are potential liquid organic hydrogen carrier systems (LOHCs) (toluene and methylcyclohexane, N-ethylcarbazole and dodecahydro-N-ethylcarbazole, dibenzyltoluene and octadecahydro-dibenzyltoluene) have been measured within pressure range of (1 to 25) MPa within wide range of temperature varying from 293.15 K to 523.15 K. The experimental data were

The present work intends to know the nanoparticle stability in biodiesel blend (B20) and the combustion analysis of direct injection, single-cylinder, diesel engine. The aluminum oxide (Al2O3) nanoparticle additive with QPAN 80 dispersant (DSP) was mixed in B20. The nanoparticle was added in B20 at a proportion of 50 ppm together with 100 ppm dispersant. The test fuels considered were as follows: D100

In present work, experimental studies were carried out in a plate heat exchanger to investigate heat transfer characteristics such as heat transfer rate, overall heat transfer coefficient, convective heat transfer coefficient, effectiveness and pumping power for a 35:65 (v/v) ratio ethylene glycol and water mixture based Al2O3 nanofluid in weight concentration range of 0.2% to 2%. Distilled water was

The convective flow boiling characteristics of aqueous Al2O3 and TiO2 nanofluids are presented in this paper. Stable suspensions of aqueous Al2O3 and TiO2 nanofluids at two different concentrations of 0.01 and 0.1 wt% were prepared and allowed to flow through a horizontal annulus under varying heat flux from 26,140.132 to 53,573.503 W⋅m−2 and varying flow rates from 3 to 6 L⋅min−1. Parametric effects

Recently, coordinate transformation method can be used to design invisibility cloaks for many types of waves, including heat conduction. The main difficulties encountered implementing the cloaking devices may be due to singular and anisotropic thermodynamic properties after coordinate transformation. This paper designs a nonlinear cloak with tunable thermodynamic parameters from a thermal diffusion

Precision data of the accurate calorimetric measurements of phase equilibria for ternary mixtures of methane, propane, and octane especially for the low concentration of octane have been presented. Based on the experimental data of heat capacity, internal energy, pressure, and temperature derivative of pressure at constant volume, the phase diagrams have been plotted in the range 140–350 K and 0.1–24 MPa

Thermal Resistance for gold (Au)–water and silver (Ag)–water interfaces are calculated using a reversed non-equilibrium molecular dynamics simulation. Temperature and heat flow dependence of Interfacial thermal resistance (ITR) based on a solid–liquid–solid nano channel system are explained. The results are compared with existing literature to investigate the effect of different force fields for both

In this study, we investigated the structural, elastic, electronic, magnetic and thermoelectric properties of Mn2RhZ (Z = Al, Si and Ge) full Heusler alloy via the full-potential linearized augmented plane wave (FP-LAPW) method. The calculated results reveal that the compound is more stable in the Hg2MnAl prototype into the ferromagnetic phase. The calculated elastic constants show that the compounds

The Type N thermocouple, at its introduction in the early 1980s, was intended to radically improve base-metal thermocouple measurements and would render other base-metal types obsolete, or so it was claimed. Almost 40 years on, Type K persists in being the thermocouple of choice, despite adequate opportunity for the uptake of Type N. The reasons for this may be many; however, recent research at is

We report a four-parameter analytical representation to target the prediction of the molar enthalpy of gaseous diatomic molecule substances. The predicted molar enthalpy is in excellent agreement with the experimental data in a wide range of temperature for CsO, CsF, and CsCl molecules. In the temperature range from 100 to 6000 K, the average relative deviations of the predicted values from the National

The internal micro-structure is an important factor affecting the thermal conductivity of materials. In this work, the relationship between micro-structure, thermal conductivity, and temperature variation for carbon fibers (CF) are systematically studied by using the transient electrothermal technique. When the temperature is below the critical temperature (about 110 K), the internal structure of carbon

1,2-Ethanediol, 1,2-propanediol and their aqueous solutions are widely used as heat transfer fluids. Their thermal conductivity is a vital physical property, yet there are only few reports in literature. In this paper, thermal conductivity of binary aqueous solutions of the two glycols was measured using the transient hot wire method at temperature from 253.15 K to 373.15 K at atmospheric pressure

The electronic and thermoelectric properties of bulk and [001] surfaces of half-Heusler compound TiNiSn are investigated consistently by combining the first principle electronic structure calculations and BOLTZRAP transport theory. It is found that semi-metallic behavior in the Fermi level compared with the bulk state of a compound is declined and just at Ti-Sn termination, a gap near the Fermi surface

The existing methods cannot effectively obtain the response signals generated by multiple defects of the pile body, which leads to the inaccuracy of the pile foundation integrity detection results, a high-rise building pile foundation integrity detection method based on the reflected wave method is proposed. The continuous wavelet transform coefficient is used to locate the defect position of pile

A measurement apparatus based on the optical fiber spectrometer is established to measure the directional spectral emissivity in the near infrared band. The sample is heated by a self-designed silicon carbide heater. The measurement angle can be adjusted from 0° to 82° by rotating the fiber collimating lens installed in a motorized rotary stage. The radiation signals of the sample and blackbody can

In the current article, the experimental measurement of thermal conductivities for non-Newtonian polymeric fluids has been performed over a wide range of polymer concentrations. Measurements of the thermal conductivity for three Newtonian fluids and three different groups of non-Newtonian polymeric aqueous fluids (twenty-four polymeric solutions) under static conditions are conducted using the cell

This work aims to present results of the measurements of the density of the anhydrous ethanol fuel in the liquid phase, and the following thermal properties: thermal expansion coefficient and isothermal compressibility factor, in the temperature range of 277.15 K to 313.15 K and for pressures up to 15.0 MPa are presented. The density measurements were performed using a pycnometer that was calibrated

In this work, it is shown that Chebyshev expansions can be used to provide a representation of pure fluid phase equilibria models that is approximately 400 times faster to evaluate than the full phase equilibrium calculation with multiparameter equations of state. The use of extended precision for the phase equilibrium calculation allows for the construction of a numerical representation approaching

A new wide-ranging correlation for the viscosity of xenon, based on the most recent theoretical calculations and critically evaluated experimental data, is presented. The correlation is designed to be used with an existing equation of state, and it is valid from the triple point to 750 K, at pressures up to 86 MPa. The estimated expanded uncertainty (at a coverage factor of k = 2) varies depending

The design, in which the capsules are packed in the bed at different sections based on the Phase Change Material (PCM) melting temperature, is an effective method to improve the heat-storage performance of the latent heat energy storage system. A latent heat storage system was established in the present study in order to optimize the arrangement of cascaded PCM capsules. Four kinds of paraffin with

In this paper, the effects of asymmetric boundary conditions encountered in refrigerators on the freezing process of raw potatoes were investigated in order to improve their preservation and extend their shelf life. A 2D numerical model, based on experimentally determined temperature-dependent thermophysical properties of potatoes, was first developed using COMSOL Multiphysics software in order to

In this article, laminar forced convection heat transfer in two-dimensional channel is investigated numerically. This investigation provides significant insight into recognizing the key parameters affecting the properties of the second law of thermodynamics, Darcy friction factor, performance evaluation criterion (PEC) and heat transfer. Because changes in the volume fraction of nanoparticles are significant

Densities in the homogeneous liquid phase of (mono-)ethanolamine (MEA) and diethanolamine (DEA) were investigated using a commercially available high-pressure vibrating-tube densimeter (VTD). Due to the melting point of the experimental materials, the setup of the VTD had to be modified by an insulated housing of the entire piping including the pressure pump. The insulated housing could be heated up

Thermal barrier coatings are applied to the protection of metal components in aircraft thrusters, power generation and ship gas turbine engines, which can make the gas turbine run for a long time in a high-temperature environment. The fracture toughness of the coating characterizes the ability of the material to prevent crack propagation and is one of the most important factors to be taken into consideration

Surface tension and phase equilibria of N,N-dimethylcyclohexylamine (DMCA) mixtures with alcohol (propanol, iso-propanol, butanol, and iso-butanol) were modeled over the whole range of composition and different temperature ranging from (288.15 to 308.15) K. The predictive results of the Peng–Robinson equation of state with quadratic mixing rule indicated that the DMCA + alcohol mixtures are not azeotropic

The thermal analysis of melting process of phase change material in rectangular latent thermal energy storage unit is presented herein. To resolve the low heat transfer rate due to the low thermal conductivity of pure paraffin (the phase change material of this study), the nano-paraffin approach has been numerically investigated. Four nano-metal oxides (Al2O3, MgO, SiO2 and SnO2) with high thermal