Mixed convection characteristic in a lid-driven cavity containing heated triangular block: Effect of location and size of block

Gangawane, Krunal M.; Öztop, Hakan F.; Abu‐Hamdeh, Nidal H.

doi:10.1016/j.ijheatmasstransfer.2018.03.079

Cited by 50 publications

(23 citation statements)

References 26 publications

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“…In the literature, some investigation of the mixed convection in vented cavities were reported using different inlet and outlet ports location [17][18][19][20], uniform and non-uniform heated wall [21][22][23][24], adiabatic ,isothermal or heated solid block with different shape, size location and [25][26][27][28][29][30][31][32][33]. Gupta et al [34] studied a mixed convection in a ventilated cavity for different thermal conditions of the cavity walls with heated conducting cylinder at the size of D (0.1-0.5) and conductivity K (0.1-10).Considering two cases of heated walls.…”

Section: Introductionmentioning

confidence: 99%

Optimal Conditions of Natural and Mixed Convection in a Vented Rectangular Cavity with a Sinusoidal Heated Wall Inside with a Heated Solid Block

et al. 2021

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The present investigation deals with the natural, mixed and forced convection in a vented rectangular cavity having a sinusoidal heated vertical wall with a conducting solid block placed at one of the nine positions. The objective is to analyze numerically using finite element method the effects of the following parameters: inlet, outlet positions, solid square positions, thermal coefficient λ, amplitude ratio ɛ, phase deviation ϕ and the solid square size on the thermo-convective flows. The Richardson number is varied from 0 to 40, the Reynolds and Prandtl numbers are fixed respectively at 100 and 0.71. To quantify the heat transfer of the solid block and to get closer to real conditions, we have developed a modification based on the evaluation of the Nusselt number using the average temperature in the cavity, unlike previous works which used the input temperature. As results, the sinusoidal temperature at the right wall gives higher heat transfer enhancement. The variation of the phase deviation and amplitude ratio have a slightly effect on the average fluid temperature and average Nusselt at the right wall and at the square solid.

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Section: Introductionmentioning

confidence: 99%

Optimal Conditions of Natural and Mixed Convection in a Vented Rectangular Cavity with a Sinusoidal Heated Wall Inside with a Heated Solid Block

et al. 2021

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“…Gangawane [16] numerically studied the mixed convection and heat transfer analysis in square lid-driven cavity containing heated triangular block with constant heat flux condition. Then, Gangawane et al [17] examined the influence of position of the heated triangular block along the vertical centreline of cavity on mixed convective characteristics. They assumed flow is steady, 2D, laminar and for Newtonian and incompressible.…”

Section: Introductionmentioning

confidence: 99%

Flow Dynamics of Lid-Driven Cavities With Obstacles of Various Shapes and Configurations Using the Lattice Boltzmann Method

Rajan¹,

Perumal²

2021

Journal of Thermal Engineering

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This work implements the emerging computational technique namely the Lattice Boltzmann Method (LBM) to a fluid flow problem of single sided lid-driven cavities with various shapes of obstacles placed in it. The numerical methodology employs the Single-Relaxation-Time (SRT) model applicable to low Mach number hydrodynamic problem for incompressible flow regime. Three geometrical shapes of the obstacles considered are circular, square, and elliptic. Cavity with obstacles exhibited remarkable circulation zones and structures in contrast to the classical lid driven cavity. The flow mechanics and the vortex dynamics are studied for various values of Reynolds Number (Re = 100, 400, and 1000). Due to the introduction of the obstacles, a strong induced vortex forms close to the obstacles and its size changes interestingly with the variation of Reynolds number, which is captured by LBM. Further the study is extended to examine the vortex phenomena induced by changing the position of the obstacles within the cavity. It is observed that the flow structures change dramatically with little change in the position of obstacle inside the cavity which helps to identify position with enhanced mixing characteristics.

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“…Conducting or adiabatic solid bodies can be inserted into the vented cavity system to control the fluid flow and convective heat transfer features. In the literature, simple obstacle shapes such as stationary or rotating circular cylinders [4][5][6][7][8][9] and rectangular [10][11][12][13] and triangular [14,15] shaped bodies are used in cavities or channels in convection related studies. The size, location, and thermal conductivity of the body are important factors for convective heat transfer enhancement.…”

Section: Introductionmentioning

confidence: 99%

Pulsating Flow of CNT–Water Nanofluid Mixed Convection in a Vented Trapezoidal Cavity with an Inner Conductive T-Shaped Object and Magnetic Field Effects

2020

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Mixed convection of carbon-nanotube/water nanofluid in a vented cavity with an inner conductive T-shaped object was examined under pulsating flow conditions under magnetic field effects with finite element method. Effects of different parameters such as Richardson number (between 0.05 and 50), Hartmann number (between 0 and 30), cavity wall inclination (between 0 ∘ and 10 ∘ ), size (between 0.1 H and 0.4 H) and orientation (between −90 ∘ and 90 ∘ ) of the T-shaped object, and amplitude (between 0.5 and 0.9) and frequency (Strouhal number between 0.25 and 5) of pulsating flow on the convective flow features were studied. It was observed that the average Nusselt number enhanced with the rise of strength of magnetic field, solid nanoparticle volume fraction, and amplitude of the pulsation, while the effect was opposite for higher values of Ri number and cavity wall inclination angle. The presence of the T-shaped object and adjusting its size and orientation had significant impact on the main flow stream from inlet to outlet and recirculations around the T-shaped object and in the vicinity of hot wall of the cavity along with the magnetic field strength. Pulsating flow resulted in heat transfer enhancement as compared to steady flow case for all configurations. However, the amount of increment was different depending on the variation of the parameters of interest. Heat transfer enhancements were 41.85% and 20.81% when the size of the T-shaped object was increased from 0.1 H to 0.4 H. The T-shaped object can be utilized in the vented cavity as an excellent tool for convective heat transfer control. As highly conductive CNT particles were used in water, significant enhancements in the average Nusselt number between 97% and 108% were obtained both in steady flow and in pulsating flow cases when magnetic field was absent or present.

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Mixed convection characteristic in a lid-driven cavity containing heated triangular block: Effect of location and size of block

Cited by 50 publications

References 26 publications

Optimal Conditions of Natural and Mixed Convection in a Vented Rectangular Cavity with a Sinusoidal Heated Wall Inside with a Heated Solid Block

Optimal Conditions of Natural and Mixed Convection in a Vented Rectangular Cavity with a Sinusoidal Heated Wall Inside with a Heated Solid Block

Flow Dynamics of Lid-Driven Cavities With Obstacles of Various Shapes and Configurations Using the Lattice Boltzmann Method

Pulsating Flow of CNT–Water Nanofluid Mixed Convection in a Vented Trapezoidal Cavity with an Inner Conductive T-Shaped Object and Magnetic Field Effects

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