International Journal of Heat and Fluid Flow (INT J HEAT FLUID FL)

Publisher: Institution of Mechanical Engineers (Great Britain), Elsevier

Journal description

Advances in the understanding of heat transfer and fluid flow continue to be crucial in achieving improved performance and efficiency in a broad range of mechanical and process plants. The International Journal of Heat and Fluid Flow publishes original contributions of high standards on experimental, computational, and physical aspects of convective heat transfer and fluid dynamics relevant to engineering or the environment including two-phase flows. Papers reporting on the application of these disciplines to the design and development of manufacturing and industrial processes, with emphasis on new technological fields, are also accepted. Some of these new fields include the manufacture and operation of microelectronics and micromechanical devices and systems; medical instrumentation; environmental pollution problems; environmental control in residential and commercial facilities; high speed transportation systems; food processing; and biological systems, including the human body.

Current impact factor: 1.60

Impact Factor Rankings

2016 Impact Factor Available summer 2017
2014 / 2015 Impact Factor 1.596
2013 Impact Factor 1.777
2012 Impact Factor 1.581
2011 Impact Factor 1.927
2010 Impact Factor 1.802
2009 Impact Factor 1.498
2008 Impact Factor 1.335
2007 Impact Factor 1.283
2006 Impact Factor 1.391
2005 Impact Factor 1.085
2004 Impact Factor 0.988
2003 Impact Factor 1.052
2002 Impact Factor 1.013
2001 Impact Factor 0.968
2000 Impact Factor 0.511
1999 Impact Factor 0.436
1998 Impact Factor 0.652
1997 Impact Factor 0.338
1996 Impact Factor 0.398
1995 Impact Factor 0.333
1994 Impact Factor 0.653
1993 Impact Factor 0.365
1992 Impact Factor 0.26

Impact factor over time

Impact factor
Year

Additional details

5-year impact 2.22
Cited half-life 8.20
Immediacy index 0.23
Eigenfactor 0.01
Article influence 0.82
Website International Journal of Heat and Fluid Flow website
Other titles International journal of heat and fluid flow (Online), Heat and fluid flow, IJHFF
ISSN 0142-727X
OCLC 38995688
Material type Document, Periodical, Internet resource
Document type Internet Resource, Computer File, Journal / Magazine / Newspaper

Publisher details

Elsevier

  • Pre-print
    • Author can archive a pre-print version
  • Post-print
    • Author can archive a post-print version
  • Conditions
    • Authors pre-print on any website, including arXiv and RePEC
    • Author's post-print on author's personal website immediately
    • Author's post-print on open access repository after an embargo period of between 12 months and 48 months
    • Permitted deposit due to Funding Body, Institutional and Governmental policy or mandate, may be required to comply with embargo periods of 12 months to 48 months
    • Author's post-print may be used to update arXiv and RepEC
    • Publisher's version/PDF cannot be used
    • Must link to publisher version with DOI
    • Author's post-print must be released with a Creative Commons Attribution Non-Commercial No Derivatives License
    • Publisher last reviewed on 03/06/2015
  • Classification
    green

Publications in this journal

  • Oyuna Rybdylova · Alexander Osiptsov · Sergei S Sazhin · Steven Begg · M.R. Heikal

    No preview · Article · Apr 2016 · International Journal of Heat and Fluid Flow
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    ABSTRACT: In the framework of CEA R&D program to develop an industrial prototype of sodium-cooled fast reactor named ASTRID, the present work aims to propose an innovative compact heat exchanger technology to provide solid technological basis for the utilization of a Brayton gas-power conversion system, in order to avoid the energetic sodium–water interaction if a traditional Rankine cycle was used. The aim of the present work is to propose an innovative compact heat exchanger channel geometry to potentially enhance heat transfer in such components. Hence, before studying the innovative channel performance, a solid experimental and numerical database is necessary to perform a preliminary thermal–hydraulic analysis. To do that, two experimental test sections are used: a Laser Doppler Velocimetry (LDV) test section and a Particle Image Velocimetry (PIV) test section. The acquired experimental database is used to validate the Anisotropic Shear Stress Transport (ASST) turbulence model. Results show a good agreement between LDV, PIV and ASST data for the pure aerodynamic flow. Once validated the numerical model, the innovative channel flow analysis is performed. Principal and secondary flow has been analyzed, showing a high swirling flow in the bend region and demonstrating that mixing actually occurs in the mixing zone. This work has to be considered as a step forward the preposition of a reliable high-performance component for application to ASTRID reactor as well as to any other industrial power plant dealing needing compact heat exchangers.
    No preview · Article · Apr 2016 · International Journal of Heat and Fluid Flow
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    ABSTRACT: Nonlinear time series analysis was applied for the first time to time series obtained from large eddy simulations (LES) of an internal combustion engine (ICE). The aim of the study was to obtain more information about the cycle-to-cycle variation (CCV) in the studied simplified ICE geometry than what is available from standard methods. Phase space reconstructions were created from the time series and then estimates for the largest Lyapunov exponent were calculated. The time delays used in the phase space reconstructions were determined using average mutual information while the proper embedding dimensions were chosen according to the method of false nearest neighbours. Quantitative information on the behaviour of the flow and the CCV was acquired from three-dimensional phase space reconstructions. Introduced modifications to the flow were clearly visible in the phase space reconstructions of energy and dissipation, indicating that these quantities are appropriate for monitoring and analysing the state of the system. The estimates for the largest Lyapunov exponents were positive for almost all time series, indicating chaotic dynamics. The permutation spectrum test was used to confirm the chaoticity of the CCV. The present results indicate that the used methods offer a promising new framework for characterising the CCV from the viewpoint of nonlinear time series analysis.
    No preview · Article · Feb 2016 · International Journal of Heat and Fluid Flow
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    ABSTRACT: A numerical investigation of transition processes initiated by deterministic and random disturbances is presented for a Mach 3 flat-plate boundary layer. In both cases, disturbance forcing is localized slightly downstream of the leading edge of the flat plate. The targeted kind of disturbance for laminar-turbulent transitions is an oblique wave but it is introduced with two different ways: deterministic suction and blowing at the wall, or random volume forcing at the edge of the boundary layer. Moreover, the forced perturbations are sinusoidal in spanwise direction with a single fixed wavenumber in the deterministic case and multiple harmonics in the random case. In the latter case, the random disturbance evolution is characterized by the RMS values of Fourier transformed velocities in a band of frequency to cover the amplifications of multiple frequency components. The observed path to turbulence with respect to the two cases are compared in three stages: linear stage, non-linear regime, and breakdown to turbulence. In the initial stage, the amplitude of unsteady disturbances grows exponentially due to a linear instability of the boundary layer, as it could be observed in the deterministic forcing case. This exponential growth is also observed after considering a broad band of frequencies in the random forcing case. In the second stage, non-linearity leads to the formation of streamwise streaks via the lift-up effect. In the deterministic case, these streaks are steady, while they take the form of low-frequency traveling waves in the case of random forcing. However, in the random forcing case a streak instability could not clearly be identified. In the final stage, sudden breakdown to turbulence occurs at a fixed streamwise location in the deterministic case, marked by a sharp rise in skin friction. Non-periodicities appear only downstream of the breakdown location. In the random forcing case, breakdown takes place within a transition zone in which one can observe the formation of distinct turbulent spots.
    No preview · Article · Dec 2015 · International Journal of Heat and Fluid Flow
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    ABSTRACT: A numerical study based on a one-dimensional two-fluid model is carried out to describe the transient hydrodynamic slugging and terrain-induced severe slugging in a pipeline-riser system. The system of equations is rendered well-posed by interfacial pressure model for the riser. The selected flow conditions are restricted in the well-posed region for the horizontal and the downward inclined pipes to ensure the hydrodynamic slug characteristics are predicted correctly. The validity of the model is examined by water faucet problem and horizontal slug flow experiments. Simulations with and without slug capturing are conducted to address the effect of hydrodynamic slugs on severe slugging. It has been found that more accurate predictions are obtained by taking hydrodynamic slugs into account. At low superficial gas velocity, the simulation without slug capturing tends to overestimate the severe slugging period. When hydrodynamic slugs are captured, the upstream gas expansion is suppressed by the hydrodynamic slugs. At relatively high superficial gas velocity, the simulation without slug capturing tends to underestimate the severe slugging period. When hydrodynamic slugs are captured, the upstream compressible volume is greatly enlarged by the blowout of the hydrodynamic slugs. In both situations, the influences of the hydrodynamic slugs can reduce the errors of the predicted severe slugging characteristics.
    No preview · Article · Dec 2015 · International Journal of Heat and Fluid Flow
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    ABSTRACT: This paper describes an experimental and computational investigation into the influence of tip clearance on the blade tip heat load of a high-pressure (HP) turbine stage. Experiments were performed in the Oxford Rotor facility which is a 1 1/2 stage, shroudless, transonic, high pressure turbine. The experiments were conducted at an engine representative Mach number and Reynolds number. Rotating frame instrumentation was used to capture both aerodynamic and heat flux data within the rotor blade row. Two rotor blade tip clearances were tested (1.5% and 1.0% of blade span). The experiments were compared with computational fluid dynamics (CFD) predictions made using a steady Reynolds-averaged Navier-Stokes (RANS) solver. The experiments and computational predictions were in good agreement. The blade tip heat transfer was observed to increase with reduced tip gap in both the CFD and the experiment. The augmentation of tip heat load at smaller clearances was found to be due to the ingestion of high relative total temperature fluid near the casing, generated through casing shear.
    No preview · Article · Dec 2015 · International Journal of Heat and Fluid Flow
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    ABSTRACT: We investigate highly-disturbed turbulent flows in a square channel with V-shaped ribs mounted on one wall. A planar particle image velocimetry (PIV) system is used to measure the fully developed turbulent flow at the channel midspan and two off-center planes. V-shaped rib configurations with three different inclinations (60°, 45° and 30°) are studied and compared to the perpendicular (90°) rib case. The highly-disturbed turbulent flow in the V-shaped rib cases are studied by investigating the statistics of first and second order moments, including the mean velocity, mean shear, mean vorticity and Reynolds stresses. Owing to the geometrical skewness of the V-shaped ribs, strong secondary flows are induced which appear in the pattern of a pair of streamwise counter-rotating roll cells and have a significant impact on the momentum transport process. Near the channel midspan of the V-shaped ribs, turbulent intensity is suppressed above the ribs but enhanced below the rib height, and turbulent vortical motions exhibit isotropic patterns due to the strong disturbances from the ribs. The coherent flow structures have been systematically analyzed based on studying two-point auto-correlation coefficient, quadrant decomposition of Reynolds stresses, swirling strength, and proper orthogonal decomposition of the turbulent flow.
    No preview · Article · Dec 2015 · International Journal of Heat and Fluid Flow
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    ABSTRACT: The response of a high-Reynolds-number M=. 0.6 isothermal jet to a Plasma Synthetic Jet actuator is investigated through phase-locked PIV measurements and numerical simulations. Experimentally, a single actuator located at the nozzle lip is triggered to produce a synthetic microjet, leading to the generation of a large-scale coherent structure growing into the jet mixing layer. A comparison between the measurements and the simulation is performed, showing satisfactory similarities and suggesting a suitable modeling of the interaction of the actuator with the jet mixing layer. Based on the numerical results, a detailed analysis of this interaction shows that the pressure waves created by the arc discharge in the actuator are triggering the development of the structure observed downstream, while the synthetic microjet plays a secondary role with present configuration.
    No preview · Article · Dec 2015 · International Journal of Heat and Fluid Flow
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    ABSTRACT: The effect of winglet width-to-pitch ratio, w/p, on tip leakage aerodynamics over the cavity squealer tip equipped with full coverage (FC) winglets for a squealer rim height-to-span ratio of hst/s = 3.75% has been investigated in a turbine cascade for a tip gap-to-span ratio of h/s = 1.36%. Based on near-tip flow visualizations and flow measurements, various tip leakage flow changes by installing the FC winglet on the cavity squealer tip are discussed in detail. With the increment of w/p, the total pressure loss coefficient mass-averaged all over the measurement plane, C[U+203E]Pt, for the cavity squealer tip with the FC winglet increases for w/p≤2.64%, decreases for 2.64%<w/p<10.55%, and then becomes nearly constant. The maximum reduction of CPt by installing the FC winglet on the cavity squealer tip is 5.8% of CPt for the cavity squealer tip without winglet. This is only almost half of the maximum loss reduction by installing the FC winglet on the plane tip with respect to CPt for the plane tip without winglet. As w/p increases, the FC winglet works better in flow turning within the turbine blade passage.
    No preview · Article · Dec 2015 · International Journal of Heat and Fluid Flow
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    ABSTRACT: In this work, a new method is proposed to determine the two-phase flow regime based on the capacitance trace of the flow. The experimental data set contains 123 capacitance traces measured for a horizontal tube with an inner diameter of 8mm. The tested refrigerant is R134a. The mass flux is varied between 200 and 500kg/m2s and the vapour quality x is varied between 0 and 1. For each capacitance signal the wavelet variance is estimated based on the maximum overlap wavelet transform of the signal. The used wavelet function is a D8 wavelet of the Daubechies family. A feature space is generated based on the wavelet variance values associated with frequencies below 100Hz. Principal component analysis and linear discriminant analysis are subsequently applied to this raw feature space, after which the Fuzzy c-means clustering algorithm is used to divide the feature space into clusters corresponding to different flow regimes. The resulting flow regime assignment shows a good agreement with a visual classification of the data set based on flow visualisations. Finally, the classification was performed based on variable training data to show the robustness of the method.
    No preview · Article · Dec 2015 · International Journal of Heat and Fluid Flow
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    ABSTRACT: The flow above the free end of a surface-mounted finite-height cylinder was studied in a low-speed wind tunnel using particle image velocimetry (PIV). Velocity measurements were made in vertical and horizontal measurement planes above the free end of finite cylinders of aspect ratios AR = 9, 7, 5 and 3, at a Reynolds number of Re = 4.2×104. The relative thickness of the boundary layer on the ground plane was δ/D = 1.7. Flow separating from the leading edge formed a prominent recirculation zone on the free-end surface. The legs of the mean arch vortex contained within the recirculation zone terminate on the free-end surface on either side of the centreline. Separated flow from the leading edge attaches onto the upper surface of the cylinder along a prominent attachment line. Local separation downstream of the leading edge is also induced by the reverse flow and arch vortex circulation within the recirculation zone. As the cylinder aspect ratio is lowered from AR = 9 to AR = 3, the thickness of the recirculation zone increases, the arch vortex centre moves downstream and higher above the free-end surface, the attachment position moves downstream, and the termination points of the arch vortex move upstream. A lowering of the aspect ratio therefore results in accentuated curvature of the arch vortex line. Changes in aspect ratio also influence the vorticity generation in the near-wake region and the shape of the attachment line.
    No preview · Article · Dec 2015 · International Journal of Heat and Fluid Flow
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    ABSTRACT: Riblet films are a passive method of turbulent boundary layer control that can reduce viscous drag. They have been studied with great detail for over 30years. Although common riblet applications include flows with Adverse Pressure Gradients (APG), nearly all research thus far has been performed in channel flows. Recent research has provided motivation to study riblets in more complicated turbulent flows with claims that riblet drag reduction can double in mild APG common to airfoils at moderate angles of attack. Therefore, in this study, we compare drag reduction by scalloped riblet films between riblets in a zero pressure gradient and those in a mild APG using high-resolution large eddy simulations. In order to gain a fundamental understanding of the relationship between drag reduction and pressure gradient, we simulated several different riblet sizes that encompassed a broad range of s+ (riblet width in wall units), similarly to many previously published experimental studies. We found that there was only a slight improvement in drag reduction for riblets in the mild APG. We also observed that peak values of streamwise turbulence intensity, turbulent kinetic energy, and streamwise vorticity scale with riblet width. Primary Reynolds shear stresses and turbulence kinetic energy production however scale with the ability of the riblet to reduce skin-friction.
    No preview · Article · Dec 2015 · International Journal of Heat and Fluid Flow
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    ABSTRACT: The problem of suppressing flow oscillations in a thermocapillary flow is addressed using a gradient-based control strategy. The physical problem addressed is the "open boat" process of crystal growth, the flow in which is driven by thermocapillary and buoyancy effects. The problem is modeled by the two-dimensional unsteady incompressible Navier-Stokes and energy equations under the Boussinesq approximation. The goal of the control is to suppress flow oscillations which arise when the driving forces are such that the flow becomes unsteady. The control is a spatially and temporally varying temperature gradient boundary condition at the free surface. The control which minimizes the flow oscillations is found using a conjugate gradient method, where the gradient of the objective function with respect to the control variables is obtained from solving a set of adjoint equations. The issue of choosing an objective function that can be both optimized in a computationally efficient manner and optimization of which provides control that damps the flow oscillations is investigated. Almost complete suppression of the flow oscillations is obtained for certain choices of the objective function.
    No preview · Article · Dec 2015 · International Journal of Heat and Fluid Flow