Numerical Simulation of Flow Over Two Side-By-Side Circular Cylinders

Sarvghad-Moghaddam, Hesam; Nooredin, Navid; Ghadiri-Dehkordi, Behzad

doi:10.1016/s1001-6058(10)60178-3

Cited by 46 publications

(9 citation statements)

References 21 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

Self Cite

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“…In this study, several attempts have been done in order to ensure that the applied computer code has sufficient accuracy. In the first stage, the numerical results of the stationary side-by-side cylinders are compared with available data [36][37][38] in the literature. The results of this comparison are shown in table 2.…”

Section: Validation Of the Numerical Codementioning

confidence: 99%

Analysis of heat and fluid flow around two co-rotating side-by-side cylinders

Hassanzadeh

Darvishyadegari

2019

Sādhanā

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Analysis of the heat and fluid flow around two co-rotating side-by-side cylinders is the subject of this numerical study which is done at constant Reynolds and Prandtl numbers of 200 and 7.0, respectively. Both cylinders rotate in the counterclockwise direction with an identical rotating speed (RS) in the range from 0 to 4. On the other hand, several gap spaces between the rotating cylinders such as G/D = 1.5, 2.0, and 3.0 are considered in the present study. The obtained results are validated against the available data in the open literature. Many different results have been reported in this investigation. It is observed that co-rotating the cylinders deforms the wake region downstream of both cylinders which the vortex strength of the lower cylinder against the rotation is stronger than that of the upper cylinder. On the other hand, co-rotating the cylinders develops a negative lift force on both cylinders. Finally, it was concluded that rotating the side-by-side cylinders reduces the heat transfer rate between the fluid flow and cylinders in general. At whole RS and G/D values, the heat transfer rate of the upper cylinder is realized to be less than that of the lower cylinder. adhana(0123456789().,-volV)FT3 ](0123456789().,-volV)

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“…Although the examined grids provide very small errors for the time‐averaged lift and drag coefficients as well as the mean Nusselt number of both upper and lower cylinders, however, the fourth grid system with 37,468 nodes is applied in all simulations. On the other hand, to check the applied computer code accuracy, the obtained results for stationary side‐by‐side cylinders are compared with available data . These comparisons are presented in Table .…”

Section: Grid Size Independence and Validationmentioning

confidence: 99%

Analysis of the convective heat transfer and flow behavior around two counter‐rotating side‐by‐side cylinders

Darvishyadegari

Hassanzadeh

2018

Heat Trans. Asian Res.

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This study presents details of the heat and fluid flow around two counter-rotating cylinders. For this goal, three different nondimensional gap spaces such as G/D = 1.5, 2.0, and 3.0 are examined in the constant Reynolds number of 200 and Prandtl number of 7.0. In addition, computations are carried out at various nondimensional rotating speeds (R.S) in the range from 0 to 4. The obtained results are validated against the available data in the open literature for stationary cases.The results showed that the flow structure, vortex shedding process, and exerted forces on the cylinders strongly depended on the R.S and G/D. Reductions of the drag coefficients are observed for both cylinders with increasing the R.S due to suppression of the wake downstream of the cylinders at low R.S and eliminating the vortex shedding process at high R.S. Finally, it is demonstrated that, regardless of the G/D value, increasing the R.S

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Numerical Simulation of Flow Over Two Side-By-Side Circular Cylinders

Cited by 46 publications

References 21 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

Analysis of heat and fluid flow around two co-rotating side-by-side cylinders

Analysis of the convective heat transfer and flow behavior around two counter‐rotating side‐by‐side cylinders

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