Effects of wall suction/blowing on two-dimensional flow past a confined square cylinder

Zhang, Wei; Jiang, Yanqun; Li, Lang; Chen, Guoping

doi:10.1186/s40064-016-2666-7

Cited by 3 publications

(2 citation statements)

References 18 publications

(30 reference statements)

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“…In the last several decades, a lot of researchers have explored the boundary layer flow with suction/injection due to its potential applications in the field of aerodynamics and space science [33]. Zhang et al, [34] investigated the effects of wall suction/blowing on two dimensional (2-D) flow past a confined square cylinder. They found that an increase in the Reynolds number destabilizes the flow.…”

Section: Introductionmentioning

confidence: 99%

Nanofluid Stagnation-Point Flow Using Tiwari and Das Model Over a Stretching/Shrinking Sheet with Suction and Slip Effects

Yashkun¹,

Zaimi²,

Bakar³

et al. 2020

ARFMTS

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In this paper, we considered the stagnation point flow and heat transfer of nanofluid over the stretching/shrinking surface by utilizing of Tiwari and Das nanofluid model. Additionally, the impact of suction and the first order slip likewise have been taken into the account. The system of governing partial differential equations (PDEs) is changed into the system of non-linear ordinary differential equations (ODEs) by means of similarity transformation. The resultant ODEs are solved by using BVP solver (bvp4c) in MATLAB software. The impact of some physical parameters, for example the suction parameter and the slip parameter on the skin friction coefficients and the local Nusselt number as well as the temperature and velocity profiles have been investigated, tabulated and graphically presented. These profiles and variations demonstrate that there exist dual solutions for a specific range of the stretching/shrinking parameter. Both suction and slip effects has enhance the local Nusselt number which represent heat transfer rate at the surface. It is also found that inclusion of both suction and slip effects expands the range of the dual solutions exist. The existence of the dual solutions only occurs in in the shrinking region. The flow separation in the boundary layer delay due to suction and slip effects imposed in the boundary condition.

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Section: Introductionmentioning

confidence: 99%

Nanofluid Stagnation-Point Flow Using Tiwari and Das Model Over a Stretching/Shrinking Sheet with Suction and Slip Effects

Yashkun¹,

Zaimi²,

Bakar³

et al. 2020

ARFMTS

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show abstract

“…Sohankar et al (2015) investigated the effects of uniform suction and blowing positioned on three different surfaces of a square cylinder in order to attain optimum configuration. Zhang et al (2016) conducted a numerical simulation to study the laminar flow past a square cylinder confined in a channel subjected to a locally uniform blowing or suction speed positioned at the top and bottom channel walls. The numerical results showed that wall blowing has a stabilizing influence on the flow accordingly the corresponding critical Reynolds number rises monotonically with the blowing velocity.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Vortex Development and Thermo-Solutal Transfers on Confined Wall Jets Submitted to Suction or Blowing: Part 2

Mejri¹,

Knani²

2018

JAFM

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A computational study is conducted to explore the effect of vertical wall suction or blowing on two-dimensional confined wall jet hydrodynamic characteristics. Using an implicit finite volume technique in Cartesian coordinate system, several parameters have been investigated for a wide range of Lewis numbers by fixing the Prandtl number at 7 that corresponds to water. The main purpose is to analyze the control size and location effectiveness on the flow pattern as well as heat and mass transfer rates. Detailed numerical simulations demonstrated that as the local blowing is moved downstream, discrete vortex formation begins at a critical location then shedding phenomenon occurs behind the slot at advanced positions. Since the flow dynamic structure is mainly altered, averages skin friction and thermo-solutal coefficients distributions are largely influenced. Approximately for ≤ 4 (upstream of the natural vortex emission position), Nusselt and Sherwood numbers slightly increase with the control location. However, they gradually decrease as the blowing slot approaches the domain exit. Optimum values were obtained when locating the slot just downstream of the uncontrolled Kelvin-Helmholtz instability onset. Furthermore, computations illustrated that an appropriate suction slot length selection could be a simple and efficient tool to delay or even suppress natural structure emission and development. This choice is essentially related to the recirculation cell size.

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Drag Reduction for Flow Past a Square Cylinder Using Rotating Control Cylinders—A Numerical Simulation

Subhankar

Senthilkumar

Karthikeyan

2018

Lecture Notes in Mechanical Engineering

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Effects of wall suction/blowing on two-dimensional flow past a confined square cylinder

Cited by 3 publications

References 18 publications

Nanofluid Stagnation-Point Flow Using Tiwari and Das Model Over a Stretching/Shrinking Sheet with Suction and Slip Effects

Nanofluid Stagnation-Point Flow Using Tiwari and Das Model Over a Stretching/Shrinking Sheet with Suction and Slip Effects

Characterization of Vortex Development and Thermo-Solutal Transfers on Confined Wall Jets Submitted to Suction or Blowing: Part 2

Drag Reduction for Flow Past a Square Cylinder Using Rotating Control Cylinders—A Numerical Simulation

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