Numerical Analysis of the Parameters Governing 3D Laminar Mixed Convection Flow in a Rectangular Channel with Imposed Wall Flux Density

Aidaoui, Lakhdar; Lasbet, Yahia; Loubar, Khaled

doi:10.18280/ijht.340405

Cited by 3 publications

(3 citation statements)

References 17 publications

(20 reference statements)

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“…It is defined as the stress difference between the flow direction and the velocity gradient [20,21]. The concept of normal stress is directly reflected by pole climbing, jet swelling, floating siphon of non-Newtonian fluid.…”

Section: Mathematical Modelmentioning

confidence: 99%

Hydrodynamics of residual oil droplet displaced by polymer solution in micro-channels of lipophilic rocks

Fan¹,

Liu²,

Liu³

et al. 2017

IJHT

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The upper-convected Maxwell model was adopted to describe the rheological properties of polymer solutions. Then, the author established the flow equations of viscoelastic polymer solutions in pore channels and constructed a 3D flowing model of the displacing fluid. Next, the flow distribution was numerically calculated to obtain the stress distribution of the flow, the residual oil was displaced by a viscoelastic polymer solution in 3D micro-channels, and the horizontal stress difference and normal partial stress were recorded horizontal and vertical to the flow direction. Thereafter, the hydrodynamics of the residual oil displaced with a viscoelastic polymer solution was investigated from a hydrodynamic perspective. It is concluded that: the Weissenberg number has a major impact on the deformation index. As the Weissenberg number increases, the advancing angle increases while the receding angle decreases, thus pushing up the deformation index. With further increase in the Weissenberg number, the deformation index first increases linearly and then parabolically. In the research, the deformation and breakage of the residual oil in the polymer waterflooding were observed through the microscopic displacement visualization experiment, and the stress state of the residual oil in the displacement process was qualitatively analysed. With numerical simulation, this research provides fresh insights into the stress state of the residual oil in displacement.

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Section: Mathematical Modelmentioning

confidence: 99%

Hydrodynamics of residual oil droplet displaced by polymer solution in micro-channels of lipophilic rocks

Fan¹,

Liu²,

Liu³

et al. 2017

IJHT

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“…The results showed that the use of SiO2-EG at a volume fraction of 6% and of 800 results in a higher average Nusselt number of about 50% compared to the case of using =100. Other interesting analysis of the effect of different techniques with and without nanofluids on enhancing heat transfer can be found in references [24][25][26]. Many studies investigated the effect of hydrodynamics on fish locomotion.…”

Section: Introductionmentioning

confidence: 99%

2D Numerical Study of Heat Transfer Enhancement Using Fish-Tail Locomotion Vortex Generators

Yousif¹,

Kadhim²,

Al-Chlaihawi³

2021

MMEP

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In this paper, a numerical simulation is performed to study the effect of two types of concave vortex generators (VGs), arranged as fish-tail locomotion in a rectangular channel. The heat transfer and fluid flow characteristics with and without VGs are examined over the Reynolds number range 200≤Re≤2200.The two proposed types of the VGs are selected based on the speed of the fish movement which is arranged in different distances between them (d/H=0.6, 1, 1.3). The results show that the use of VGs can significantly enhance the heat transfer rate, but also increases the friction factor. The heat transfer performance is enhanced by (4-21.1%) reaching the maximum value by using the first type of the VGs at (d/H=1.3) due to better mixing of secondary flow and the new arrangement of the VGs which lead to decreasing the friction factor with an easy flow of fluid.

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“…Roy and Basak, [7]Studied numerically natural convection with uniform heating on the bottom and the vertical wall ,and also the non_uniform heating for different parameters Pr (0.2-100) and Ra (103-106). Benderradji et al [8]studied the effect of the variation of the two parameters (Grashof and Reynolds) in laminar mixed convection inside a cubic cavity.Aidaoui et al [9] made a numerical investigation of the parameter affecting 3D in a rectangular channel at constant flux density for laminar convection flow regime using CFD code. Oronzio et al [10] have been made an experimental mixed convection investigation in a vented cavity with forced flow entering throw the heated vertical wall side (experimental mixed convection.).…”

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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Numerical Analysis of the Parameters Governing 3D Laminar Mixed Convection Flow in a Rectangular Channel with Imposed Wall Flux Density

Cited by 3 publications

References 17 publications

Hydrodynamics of residual oil droplet displaced by polymer solution in micro-channels of lipophilic rocks

Hydrodynamics of residual oil droplet displaced by polymer solution in micro-channels of lipophilic rocks

2D Numerical Study of Heat Transfer Enhancement Using Fish-Tail Locomotion Vortex Generators

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

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