Analysis of Mixed Convection in a Lid Driven Trapezoidal Cavity

Mamun, Md. Abdullah Al; Tanim, Tanvir R.; Rahman, Md. Mustafizur; Saidur, R.; Nagata, Shuichi

doi:10.5772/21108

Cited by 6 publications

(4 citation statements)

References 30 publications

(31 reference statements)

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“…In addition, the results acquired by present code also has been validated by comparing the average Nusselt number with that of the results obtained by Iwatsu et al [12] and Mamun et al [13], is shown in the [12] and Mamun et al [13].…”

Section: Resultssupporting

confidence: 68%

Mixed Convection Heat Transfer in a Lid Driven Cavity with Wavy Bottom Surface

Saha¹,

Somadder²,

Uddin³

2013

AJAM

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The present numerical study is devoted to investigate the mixed convection flow and heat transfer in a lid-driven cavity with wavy bottom surface. The cavity upper wall is moving with a uniform velocity by unity and the other walls are no slip. The cavity vertical walls are insulated while the upper surface is maintained at a uniform temperature higher than the wavy bottom surface. The physical problem is represented mathematically by a set of governing equations and the developed mathematical model is solved by employing Galerkin weighted residual method of finite element formulation. The wide ranges of governing parameters, i. e., the Reynolds number (Re), the Grshof number (Gr) and the number of undulations (λ) on the flow structure and heat transfer characteristics are investigated in detail. It is found that these parameters have significant effect on the flow fields; temperature distributions and heat transfer in the cavity. Furthermore, the trend of skin friction and Nusselt number for different values of the aforementioned parameters are presented in this investigation.

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Section: Resultssupporting

confidence: 68%

Mixed Convection Heat Transfer in a Lid Driven Cavity with Wavy Bottom Surface

Saha¹,

Somadder²,

Uddin³

2013

AJAM

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“…It was noticed that for a constant Re and Pr numbers as the rotation rate decreased, the average Nu number was also decreased. Mixed convection heat transfer in a trapezoidal cavity was studied numerically [17]. It can be noticed as the Ri number increased the average Nu number increased for all aspect ratios, and it was reduced as the rotational angle increased.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of the Effect of Orientation Angles on Combined Convection in a Cavity Contain Rotation Cylinder

Shrama¹,

Abood²,

Yaseen³

et al. 2022

Proceedings of 2nd International Multi-Disciplinary Conference Theme: Integrated Sciences and Technologies, IMDC-IST 2021, 7-9

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“…The results demonstrated that flow and heat transfer behavior pertains to the inlet and Reynolds numbers and Rayleigh numbers. Mamun et al 17 examined the combined heat transfer inside a trapezoid with a heat flux from below and a horizontally movable wall numerically. Bhattacharya et al 18 studied the flow and heat transfer behavior inside a parallel chamber with a cold moving top wall numerically.…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling of thermo‐flows in a trapezoidal cavity containing different solid objects

et al. 2022

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Heat transfer in chambers is essential in the industry as heating/cooling systems, as well as electronic equipment. This study investigates the mixed heat transfer of fluid inside a trapezoidal chamber with a hot obstacle.The variable parameters include trapezoidal side angles, Rayleigh number, surface emissivity coefficient of obstacle, heat conduction ratio, and aspect ratio of obstacle. In addition, the geometry of solid obstacles is considered rectangular and circular. The governing equations are solved numerically by a fourth-order characteristics-based scheme. The bottom wall of the obstacle has persistent heat flux, another wall is adiabatic and the sidelong walls of the cavity are cold, and the upper and lower walls are adiabatic. Moreover, the other walls are insulated. The results demonstrate that the mean Nusselt number of cold walls declines as the angle of side walls increases in different Rayleigh numbers. Nusselt number rises with an increment of Rayleigh number at sustained angles. Higher aspect ratios and emissivity coefficients lead to higher Nusselt numbers for various Rayleigh numbers. The results show that by increasing the angle, the Nusselt number decreases up to 50%. Also, the Nusselt number for rectangle obstacles is up to 30% more than that for a

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Analysis of Mixed Convection in a Lid Driven Trapezoidal Cavity

Cited by 6 publications

References 30 publications

Mixed Convection Heat Transfer in a Lid Driven Cavity with Wavy Bottom Surface

Mixed Convection Heat Transfer in a Lid Driven Cavity with Wavy Bottom Surface

Numerical Study of the Effect of Orientation Angles on Combined Convection in a Cavity Contain Rotation Cylinder

Numerical modeling of thermo‐flows in a trapezoidal cavity containing different solid objects

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