Subjects -> PHYSICS (Total: 857 journals)
    - ELECTRICITY AND MAGNETISM (10 journals)
    - MECHANICS (22 journals)
    - NUCLEAR PHYSICS (53 journals)
    - OPTICS (92 journals)
    - PHYSICS (625 journals)
    - SOUND (25 journals)
    - THERMODYNAMICS (30 journals)

THERMODYNAMICS (30 journals)

Showing 1 - 29 of 29 Journals sorted alphabetically
Advances in Heat Transfer     Full-text available via subscription   (Followers: 26)
Applied Thermal Engineering     Hybrid Journal   (Followers: 41)
Araucaria. Revista Iberoamericana de Filosofía, Política y Humanidades     Open Access  
Archives of Thermodynamics     Open Access   (Followers: 9)
Chemical Thermodynamics and Thermal Analysis     Open Access   (Followers: 7)
Condensed Matter Physics     Open Access   (Followers: 2)
Diffusion Foundations     Full-text available via subscription   (Followers: 4)
European Journal of Mechanics - B/Fluids     Hybrid Journal   (Followers: 5)
Experimental Heat Transfer     Hybrid Journal   (Followers: 17)
Experimental Thermal and Fluid Science     Hybrid Journal   (Followers: 34)
Fluids     Open Access   (Followers: 1)
Heat and Mass Transfer     Hybrid Journal   (Followers: 28)
Heat Transfer Engineering     Hybrid Journal   (Followers: 37)
High Temperature     Hybrid Journal   (Followers: 2)
HTM Journal of Heat Treatment and Materials     Full-text available via subscription   (Followers: 3)
International Journal of Thermodynamics     Open Access   (Followers: 11)
International Journal of Thermophysics     Hybrid Journal   (Followers: 7)
Journal of Thermodynamics & Catalysis     Open Access   (Followers: 6)
Journal of Chemical Thermodynamics     Hybrid Journal   (Followers: 4)
Journal of Low Temperature Physics     Hybrid Journal   (Followers: 8)
Journal of Non-Newtonian Fluid Mechanics     Hybrid Journal   (Followers: 16)
Journal of Thermal Science     Hybrid Journal   (Followers: 21)
Journal of Thermal Spray Technology     Hybrid Journal   (Followers: 5)
Journal of Thermodynamics     Open Access   (Followers: 7)
Journal of Thermophysics and Heat Transfer     Hybrid Journal   (Followers: 93)
Low Temperature Physics     Hybrid Journal   (Followers: 6)
Metal Science and Heat Treatment     Hybrid Journal   (Followers: 36)
Quantitative InfraRed Thermography Journal     Hybrid Journal  
Thermophysics and Aeromechanics     Hybrid Journal   (Followers: 6)
Similar Journals
Journal Cover
Thermophysics and Aeromechanics
Journal Prestige (SJR): 0.447
Citation Impact (citeScore): 1
Number of Followers: 6  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1531-8699 - ISSN (Online) 0869-8643
Published by Springer-Verlag Homepage  [2468 journals]
  • Study of the transient gas outflow from a container

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      Abstract: Abstract An experimental study of the flow of air from a container through throttling tubes of various configurations with characteristic times from 0.6 to 9 s was carried out. The equivalent container-outlet area was determined based on the ratio of the length of the throttling tube to its nominal diameter. It was found that during the outflow, the gas temperature inside the container decreased by 10–15 %, which value differs substantially from the theoretical estimate of 60 % obtained assuming that the process was adiabatic. Based on the results of measuring the gas pressure and temperature in the container, a method is proposed for calculating the heat fluxes on the walls.
      PubDate: 2023-09-01
       
  • Thermal conductivity of Novec 7100 in vapor phase

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      Abstract: Abstract Thermal conductivity of a Novec 7100 fluid sample was measured by the steady-state method of coaxial cylinders. Experiments were performed in the temperature range 350–385 K and pressure range 0.12–0.21 MPa. The error for experimental data on thermal conductivity is about 1.5–2.5 %. The error in measuring temperature and pressure was less than 0.05 K and 4 kPa, correspondingly. The general equation for calculating the thermal conductivity as a function of pressure and temperature was formulated. Thermal conductivity was defined for the ideal gas state. A previously developed approach was tested in application for a single-measurement prediction of thermal conductivity.
      PubDate: 2023-09-01
       
  • Formation of a separation vortex in the vicinity of a dihedral corner
           configuration at M∞ = 2.27 and α ≤ 6°

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      Abstract: Abstract The article considers the development of a near-wall separation vortex arising at a supersonic flow around the external dihedral corner due to the pressure drop between its faces, in the range of angles of attack α = 0.5°–6°. The processes of the origin and development of separation and secondary vortices at the angle increase are investigated in detail. Particular attention is paid to the flow structure change in the vortex location zone. A clear violation of the flow self-similarity in the front part of the model in the zone of vortex system formation is shown.
      PubDate: 2023-09-01
       
  • Thermal boundary conditions at the fluid–solid interface in the case of
           a conducting body: a novel thermal lattice Boltzmann analysis

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      Abstract: Abstract In this paper, a novel thermal lattice Boltzmann approach is proposed for the implementation of the thermal boundary conditions at the fluid-solid interface. The numerical code, developed on the basis of the new approach, was validated against reliable numerical data from the literature in the cases of both square and circular conducting blocks. Analytical and experimental validations were also performed in the case of a circular block. The numerical tests show that the adopted approach makes it possible to handle interface problems with large thermal conductivity ratios. In the present study, this approach is validated first in the case of a square conducting block and used to simulate a conjugate convection-conduction problem in a square cavity enclosing a circular block. The novel developed TLBM approach reduces computational memory as well as numerical programming issues associated with the use of a hybrid method that combines the lattice Boltzmann method and classical methods.
      PubDate: 2023-09-01
       
  • The single-phase swirling flow simulation in a heat exchange channel with
           coolants counterflow at the operation parameters of PWR

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      Abstract: Abstract The results of experimental and computational studies of the processes of hydrodynamics and heat transfer of a swirling flow, heated by the counter coolant flow in the heat exchange channel under standard technological parameters of a nuclear power plant are presented in this paper. The temperature field of the heat exchange channel as a whole and the coefficient of hydraulic resistance of channels with twisted tapes of a constant swirl pitch were obtained in experiments. The numerical study was carried out using the domestic software package LOGOS and the Ansys CFX complex. The simulations were performed using the k-ω SST turbulence model, corrected for streamline curvature and rotation. Two versions of the calculation grid were developed. A comparative analysis of the calculated and experimental values of the hydraulic friction coefficient, the swirling flow temperature, and the heat transfer coefficients from the wall to the swirling flow was carried out. The analysis allowed identification of the strengths and weaknesses of the calculation methodology implemented in the domestic package. Deviations of the obtained values were compared. There is a good agreement between the calculated and experimental data, as well as with the data based on generalized dependences. One of the most important conclusions of the study is the need to modernize the process of solving the coupled heat transfer problem in the LOGOS package to expand the range of problems to be solved.
      PubDate: 2023-09-01
       
  • Solubility of crystalline tricosane in supercritical CO2 and CO2 +
           cosolvents

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      Abstract: Abstract The paper presents the results of experimental study of the solubility (VLE-properties) of crystalline tricosane in pure and modified supercritical carbon dioxide over the temperature range from (308.15 to 315.15) K and at the pressures from (8.00 to 20.32) MPa using the dynamic method. Modification of carbon dioxide fluid was performed by adding several organic solvents, such as dimethylsulfoxide, ethanol, acetone, and chloroform. It was found that using the fluid co-solvents at the concentration of 5 wt. % improves the tricosane solubility by a factor of two. The measurement results have been described by the Penga–Robinson equation of state.
      PubDate: 2023-09-01
       
  • Study of a regenerative cooling system while using heat-conductive metal
           nanoparticle suspension in n-decane

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      Abstract: Abstract The paper presents the calculation estimates for efficiency of regenerative cooling for a model cylinder-shaped flow duct using a suspension of heat-conductive metal nanoparticles in n-decane as fuel/coolant. We adapted a standard mathematical model of conjugated heat transfer that accounts for thermophysical properties of the metal nanoparticle suspension and n-decane. The data are presented for heating up the nanosuspension and the model duct walls for the cases of different content of metal nanoparticles in nanosuspension. There exists a range beneficial for heat transfer from n-decane.
      PubDate: 2023-09-01
       
  • Effect of heat losses in the temperature transducer in measurements in
           hotshot wind tunnels

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      Abstract: Abstract The study is aimed at measuring the gas flow temperature by thermocouples whose time of reaching the equilibrium temperature is comparable with the measurement time, and heat release to structural elements of the transducer can be rather large. The results of numerical simulations of the gas flow in the temperature transducer used for measuring the stagnation temperature in high-enthalpy hotshot wind tunnels are presented. A coupled problem of the air flow around the temperature transducer is solved, and the flow field inside the stagnation chamber is calculated with allowance for heat losses to input wires and structural elements of the transducer. The data obtained are considered as the results of a virtual experiment and are treated by methods of experimental aerodynamics. The retrieved results are compared with the initial numerical values of the stagnation temperature in the flow impinging onto the transducer. The sources of uncertainties arising in temperature measurements are determined, and the applicability of experimental methods for determining the stagnation temperature in short-duration wind tunnels, including those with parameters decreasing during the run, is justified. It is shown that the method of “two thermocouples” can be successfully used to determine the stagnation temperature even if the heat losses to transducer elements are comparable with heat input from the gas flow. The values of the retrieved stagnation temperature correspond to the flow temperature in the transducer within 1.2–3 % depending on the initial temperature of the thermocouple.
      PubDate: 2023-09-01
       
  • Boundary-layer control on a body of revolution with a large aspect ratio
           by means of distributed air blowing

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      Abstract: Abstract Results of studying the process of air blowing through a perforated section of the surface on an axisymmetric body with an aspect ratio of 25.3 in an incompressible flow with the Reynolds number ReL = 4.36·106 are reported. The blowing coefficient Cb is varied in the interval from zero to 0.00885. It is shown that distributed blowing through a perforated wall with improved geometry ensures a significant gain in friction drag as compared to that for the base configuration. Beginning from the frontal boundary of this section and further downstream, stable reduction of local friction is observed, which reaches 72 % directly in the region of blowing with the maximum intensity. In view of the energy expenses on the blowing process, the degree of energy saving can reach 1.4 to 6.1 % for the blowing region being located on the cylindrical part of the model. The efficiency of this method of boundary layer control can be refined by a more accurate determination of the contribution of the drag component induced by the pressure and friction forces on the frontal part of the body. The importance of estimating the possibility of using the proposed approach for the case of air blowing through a surface section on the frontal part of the body is noted.
      PubDate: 2023-09-01
       
  • Density and thermal expansion of indium–lead melts

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      Abstract: Abstract The volumetric properties of liquid indium-lead alloys containing 20 and 33 at. % Pb have been measured using gamma-ray attenuation technique at temperatures from the liquidus line to 880 K. The density changes of these alloys during solid–liquid phase transition have been calculated. The obtained experimental values of the molar volume and the volumetric thermal expansion coefficient of melts and the results of calculations according to the laws for an ideal solution and data of other authors have been compared.
      PubDate: 2023-09-01
       
  • Thermophysical and physicochemical basis for hydrogen production in
           compact energy systems of low-carbon economy

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      Abstract: Abstract Physicochemical and thermal processes occurring during methane conversion into synthesis gas under non-isothermal conditions in microstructural heat exchanger-reactors based on microchannels are considered in this paper. A method for synthesizing a rhodium-based composite thin-layer catalyst for steam reforming of methane and carbon monoxide is proposed, and the results of experimental and numerical studies of the features of steam reforming under controlled thermal conditions of a microchannel reactor are presented. The determining influence of thermal processes on the rate and sequence of multi-stage heterogeneous reactions has been revealed; the methods for controlling the steam reforming process have been developed to achieve high completeness of chemical transformations.
      PubDate: 2023-09-01
       
  • Mathematical modeling of self-excited oscillations over the pitch of a
           conical-spherical body at Mach number M = 1.75 using the
           forced-oscillation hypothesis

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      Abstract: Abstract With the aim to model the self-excited oscillations of a body, a hypothesis is proposed for the formation of periodic bottom-wake vortex structures whose frequency coincides with the natural frequency of oscillations of the body, and the force effect of the oscillations on the body is mathematically described with a harmonic function of time. Analytical formulas for aerodynamic derivatives and equivalent aerodynamic derivatives are obtained. It is shown that the mathematical model satisfactorily describes the dependence of the pitch angle on time and the dependence of the equivalent aerodynamic derivatives on the amplitude of oscillations for two moments of inertia of the body. The mathematical model predicts a hyperbolic law for the dependence of the amplitude of self-excited oscillations on the reduced frequency.
      PubDate: 2023-09-01
       
  • An OpenFOAM-based evaluation of various wall treatment strategies in
           simulating separated flows past bluff bodies with heat transfer

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      Abstract: Abstract The effect of wall treatment on the performance of k-ε model in incompressible, turbulent, separated flows with and without heat transfer has been evaluated in this study. We have simulated two benchmark cases: (i) flow past a circular cylinder at Re = 3900, and (ii) flow past a heated square cylinder at Re = 21 400 using the open source CFD package: OpenFOAM. We have compared three variants of the k-ε model, namely, Launder-Sharma k-ε model (Yap corrected) (LSKEY), Lam–Bremhorst k-ε model (Yap corrected) (LBKEY) and two-layer k-ε model (TLKE) along with the available experimental and direct numerical simulation (DNS) data. Comparisons are made in terms of the models’ capability to predict the mean flow variables, surface integral quantities, and heat transfer characteristics at different wake locations. On the basis of the presented study, we conclude that LSKEY performs better than the other models in predicting the wake and surface flow and heat transfer parameters. Further our comparisons show that, while LSKEY and LBKEY require comparable clock time per flow-through cycle, the computational time needed by TLKE is almost twice as compared to LBKEY or LSKEY. These results call for more attention from the CFD community onto the LSKEY model, in particular, so that it can be incorporated in various other flow fields, especially the scale resolving methodologies like the partially-averaged Navier-Stokes (PANS) equations, wherein a superior wall treatment along with a shorter computational time could be of immense advantage. In authors’ opinion, these benefits of the LSKEY model have largely been overlooked, perhaps because of a biased preference to the TLKE model, which enjoys the default presence in popular commercial CFD packages.
      PubDate: 2023-09-01
       
  • Simulation of the laser welding of porous and monolithic metallic plates

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      Abstract: Abstract Numerical simulation of unsteady processes proceeding during the laser welding of plates made of porous and monolithic (non-porous) metals was carried out. The influence of the welding speed on the quality of resultant welded joints and seam morphology was studied. The calculated characteristics of connections between porous and monolithic stainless-steel plates are in qualitative agreement with the results of physical experiments.
      PubDate: 2023-09-01
       
  • Influence of the pressure of a propane-butane mixture on the morphology of
           carbon nanomaterial formed in an arc discharge

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      Abstract: Abstract The morphology of carbon material formed in an arc discharge in a mixture of i-butane, n-butane, and propane when spraying a graphite-nickel electrode was studied. The experiments were carried out with changing the gas medium pressure. Carbon globules, graphene structures, and carbon nanotubes have been discovered. It was found that at pressures of 75 and 400 torr, carbon globules predominate in the resulting materials. At gas pressures of 200 torr, the material collected from the cold screen surface contains both graphene-like structures and significant amounts of carbon nanotubes. The physical reasons influencing the observed phenomena are discussed.
      PubDate: 2023-09-01
       
  • 90th Anniversary of Alexey K. Rebrov

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      PubDate: 2023-07-01
       
  • Effect of ribbing of the internal rotating cylinder in the
           Couette–Taylor system on the value of rotational resistance moment

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      Abstract: Abstract The experimental results on the effect of longitudinal ribs on the rotational resistance moment for the Couette–Taylor flow between two rotating cylinders are presented. The tangential Reynolds number in the experiments was varied by changing the velocity of cylinder rotation and the working fluid (water-glycerin solution) viscosity. The experiments covered laminar, transient, and turbulent flow regimes (Re = 200–1·105). It is shown that the ribs have an amplifying effect on the rotational resistance moment and mechanical energy dissipation only in the region of small Reynolds numbers (Re < 2000) in the laminar regime and in the presence of Taylor vortices in the gap. The intensification effect can reach two and more times and is caused by an intensive flow turbulization by longitudinal ribs. In the turbulent regime, the heat release intensification is not observed, which is confirmed by the data available in the literature.
      PubDate: 2023-07-01
       
  • Calculation of gas inflow into a vacuum vessel

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      Abstract: Abstract Based on the hypothesis of quasi-stationarity, relations were obtained for calculating the unsteady process of filling a vacuum vessel with a gas. As a criterion for the completion of the filling process, the admissible degree of pressure increase in the vacuum vessel was adopted. An analysis was made of the possibilities of increasing the duration of the filling process for a vacuum vessel of a given volume.
      PubDate: 2023-07-01
       
  • Two-dimensional steady-state traveling waves on the surface of a vertical
           rivulet

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      Abstract: Abstract Nonlinear waves in a rectilinear rivulet flowing down a vertical plate are investigated on the basis of the developed semi-analytical model. The characteristics of nonlinear quasi-two-dimensional steady-state traveling waves are obtained numerically. Another wave family (the family of double-humped waves), branching off from the first family by doubling the spatial period, is found for small values of the wave number. It is shown that steady-state traveling waves do not exist in a certain narrow range of the excitation frequency, but a pulsating wave mode is realized.
      PubDate: 2023-07-01
       
  • Effect of vibrational nonequilibrium of supersonic jets of CO2 on their
           gas-dynamic structure

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      Abstract: Abstract A nonisobaric supersonic jet of vibrationally excited carbon dioxide exhausting from converging axisymmetric nozzles with the diameter ranging in a wide interval (from 0.03 to 114 mm) is studied experimentally and numerically. Numerical simulations are performed within the framework of the two-temperature approach with the use of the Landau–Teller relaxation equation for each vibrational mode of carbon dioxide molecules. The simulations reveal that the vibrational nonequilibrium of molecules affects the gas-dynamic structure of the jets in the temperature range of 300–900 K, and this effect is verified experimentally. Vibrational excitation of molecules in the experiment is ensured by means of gas heating. The effect of vibrational nonequilibrium is manifested as a reduction of the amplitude of the static pressure in wave structure cells and as a reduction of the longitudinal size and number of wave structure cells as compared to the case of an equilibrium supersonic flow. It is shown that the maximum effect of nonequilibrium is observed in jets exhausting from the nozzle with a diameter of ≅ 3 mm.
      PubDate: 2023-07-01
       
 
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  Subjects -> PHYSICS (Total: 857 journals)
    - ELECTRICITY AND MAGNETISM (10 journals)
    - MECHANICS (22 journals)
    - NUCLEAR PHYSICS (53 journals)
    - OPTICS (92 journals)
    - PHYSICS (625 journals)
    - SOUND (25 journals)
    - THERMODYNAMICS (30 journals)

THERMODYNAMICS (30 journals)

Showing 1 - 29 of 29 Journals sorted alphabetically
Advances in Heat Transfer     Full-text available via subscription   (Followers: 26)
Applied Thermal Engineering     Hybrid Journal   (Followers: 41)
Araucaria. Revista Iberoamericana de Filosofía, Política y Humanidades     Open Access  
Archives of Thermodynamics     Open Access   (Followers: 9)
Chemical Thermodynamics and Thermal Analysis     Open Access   (Followers: 7)
Condensed Matter Physics     Open Access   (Followers: 2)
Diffusion Foundations     Full-text available via subscription   (Followers: 4)
European Journal of Mechanics - B/Fluids     Hybrid Journal   (Followers: 5)
Experimental Heat Transfer     Hybrid Journal   (Followers: 17)
Experimental Thermal and Fluid Science     Hybrid Journal   (Followers: 34)
Fluids     Open Access   (Followers: 1)
Heat and Mass Transfer     Hybrid Journal   (Followers: 28)
Heat Transfer Engineering     Hybrid Journal   (Followers: 37)
High Temperature     Hybrid Journal   (Followers: 2)
HTM Journal of Heat Treatment and Materials     Full-text available via subscription   (Followers: 3)
International Journal of Thermodynamics     Open Access   (Followers: 11)
International Journal of Thermophysics     Hybrid Journal   (Followers: 7)
Journal of Thermodynamics & Catalysis     Open Access   (Followers: 6)
Journal of Chemical Thermodynamics     Hybrid Journal   (Followers: 4)
Journal of Low Temperature Physics     Hybrid Journal   (Followers: 8)
Journal of Non-Newtonian Fluid Mechanics     Hybrid Journal   (Followers: 16)
Journal of Thermal Science     Hybrid Journal   (Followers: 21)
Journal of Thermal Spray Technology     Hybrid Journal   (Followers: 5)
Journal of Thermodynamics     Open Access   (Followers: 7)
Journal of Thermophysics and Heat Transfer     Hybrid Journal   (Followers: 93)
Low Temperature Physics     Hybrid Journal   (Followers: 6)
Metal Science and Heat Treatment     Hybrid Journal   (Followers: 36)
Quantitative InfraRed Thermography Journal     Hybrid Journal  
Thermophysics and Aeromechanics     Hybrid Journal   (Followers: 6)
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JournalTOCs
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Email: journaltocs@hw.ac.uk
Tel: +00 44 (0)131 4513762
 


Your IP address: 44.192.15.251
 
Home (Search)
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