Numerical Simulation of Flow Over Two Circular Cylinders in Tandem Arrangement

Dehkordi, Behzad Ghadiri; Moghaddam, Hesam S.; Jafari, Hamed

doi:10.1016/s1001-6058(10)60095-9

Cited by 64 publications

(21 citation statements)

References 20 publications

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“…Readers can also refer to (Abe et al 1995;Dehkordi et al 2011;Sarvghad-Moghaddam et al 2011;Garbaruk et al 2013) for further discussion on different turbulence models and their application for turbulent and supersonic flows. ANSYS CFX uses finite volume (FV) as the discretization method in which the spatial domain is divided into finite volume controls.…”

Section: Shockwave Diffractionmentioning

confidence: 99%

CFD modeling of the underwash effect of military helmets as a possible mechanism for blast-induced traumatic brain injury

Sarvghad-Moghaddam

Rezaei

Ziejewski

et al. 2016

Computer Methods in Biomechanics and Biomedical Engineering

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Underwash occurs as the incoming shockwaves enter the helmet subspace and develop a high pressure region at the opposite side of the head. The mechanism leading to the underwash is yet not well understood. To investigate this effect, the turbulent, supersonic flow of compressible air approaching the head-helmet assembly from different directions was studied through computational fluid dynamics simulations. The effects of different incident overpressures and helmet gap size on the underwash incidence were further evaluated. The backflow-induced pressure from the air traveling outside of the helmet on the outflow from the helmet, as well as the momentum change in the backside curve of the helmet were postulated as the main reasons for this effect. Side shockwaves predicted the highest underwash overpressures. The increase rate of the underwash reduced with increasing the incident shockwave intensity.

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Section: Shockwave Diffractionmentioning

confidence: 99%

CFD modeling of the underwash effect of military helmets as a possible mechanism for blast-induced traumatic brain injury

Sarvghad-Moghaddam

Rezaei

Ziejewski

et al. 2016

Computer Methods in Biomechanics and Biomedical Engineering

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“…8) tends to equations (2.6), (2.2) and (2.3), with χ B the characteristic function of the solid, defined as:…”

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confidence: 99%

An Accurate Cartesian Method for Incompressible Flows with Moving Boundaries

Bergmann

Hovnanian

Iollo

2014

Commun. comput. phys.

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An accurate cartesian method is devised to simulate incompressible viscous flows past an arbitrary moving body. The Navier-Stokes equations are spatially discretized onto a fixed Cartesian mesh. The body is taken into account via the ghost-cell method and the so-called penalty method, resulting in second-order accuracy in velocity. The accuracy and the efficiency of the solver are tested through two-dimensional reference simulations. To show the versatility of this scheme we simulate a three-dimensional self propelled jellyfish prototype.

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“…The flow visualization parameters, the Strouhal numbers, and drag and lift coefficients are thoroughly presented and compared for different cases in order to reveal the effect of the Reynolds number and gap spacing on the behavior of the flow. The obtained results have shown two completely distinct flow characteristics in laminar and turbulent regimes [11].…”

Section: Introductionmentioning

confidence: 82%

Experimental and Numerical Investigation of Flow Structures around Cylindrical Bluff Bodies

Yagmur

Doğan

Aksoy

et al. 2015

EPJ Web of Conferences

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It is shown that the numerical and experimental results have a good agreement in respect of the instantaneous and time-averaged flow field patterns of vorticity, velocity component streamwise direction and streamline topology. In addition, drag coefficient of the geometries were also numerically calculated. For all geometries the wake length in x and y directions and size of the foci of the streamlines are decreasing by increasing Reynolds numbers in time-averaged results. The time-averaged flow patterns of both experimental and numerical results have considerable symmetry with respect to the centerline of each cylinder. Contours of the time-averaged stream wise velocity for Re=10000 demonstrate that the stagnation point around the symmetry plane moves further upstream for all cylinders in accordance with Re=5000. The maximum drag coefficient value was yielded for the square cross-section cylinder as 1.78 due to the sharp-edged geometry.

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Numerical Simulation of Flow Over Two Circular Cylinders in Tandem Arrangement

Cited by 64 publications

References 20 publications

CFD modeling of the underwash effect of military helmets as a possible mechanism for blast-induced traumatic brain injury

CFD modeling of the underwash effect of military helmets as a possible mechanism for blast-induced traumatic brain injury

An Accurate Cartesian Method for Incompressible Flows with Moving Boundaries

Experimental and Numerical Investigation of Flow Structures around Cylindrical Bluff Bodies

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