Numerical simulation of a conjugate turbulent natural convection combined with surface thermal radiation in an enclosure with a heat source

Мирошниченко, И. В.; Sheremet, Mikhail А.; Mohamad, A. A.

doi:10.1016/j.ijthermalsci.2016.06.008

Cited by 60 publications

(27 citation statements)

References 25 publications

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“…A significant cooling effect of the thermal boundary layer close to the separation area is observed. This cooling effect is mainly due to the radiation effect, as reported in previous studies [24] [25] [26] [27]. In the current study (Figure 3 the maximum temperature increases by 12.2 K (1.5% increase), whereas the temperature decrease (cooling effect) in the boundary layer, close to the wall, is 124 K (17.5% decrease).…”

Section: Resultssupporting

confidence: 82%

“…In this study, when emission is coupled to the flow, the temperature is drastically decreased in the turbulent layer. Miroshnichenko et al have performed a detailed numerical analysis of complex heat transfer (turbulent natural convection, conduction and surface thermal radiation) in a rectangular enclosure [26] [27]. In their analysis they concluded that the effect of thermal radiation leads to heat transfer enhancement.…”

Section: Xenosmentioning

confidence: 99%

“…In their analysis they concluded that the effect of thermal radiation leads to heat transfer enhancement. An essential cooling of the internal volume was found with an increase in the thermal conductivity ratio [27]. Kim and Baek studied the compressible turbulent flow over a backward facing step, showing that thermal behavior is influenced by radiation and the fluid is heated faster.…”

Section: Xenosmentioning

confidence: 99%

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Thermal Radiation Effect on the MHD Turbulent Compressible Boundary Layer Flow with Adverse Pressure Gradient, Heat Transfer and Local Suction

Xenos¹

2017

OJFD

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The combined effect of magnetic field, thermal radiation and local suction on the steady turbulent compressible boundary layer flow with adverse pressure gradient is numerically studied. The magnetic field is constant and applied transversely to the direction of the flow. The fluid is subjected to a localized suction and is considered as a radiative optically thin gray fluid. The Reynolds Averaged Boundary Layer (RABL) equations with appropriate boundary conditions are transformed using the compressible Falkner Skan transformation. The nonlinear and coupled system of partial differential equations (PDEs) is solved using the Keller box method. For the eddy-kinematic viscosity the Baldwin Lomax turbulent model and for the turbulent Prandtl number the extended Kays Crawford model are used. The numerical results show that the flow field can be controlled by the combined effect of the applied magnetic field, thermal radiation, and localized suction, moving the separation point, s x , downstream towards the plate's end, and increasing total drag, D . The combined effect of thermal radiation and magnetic field has a cooling effect on the fluid at the wall vicinity. The combined effect has a greater influence in the case of high free-stream temperature.

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Section: Resultssupporting

confidence: 82%

Section: Xenosmentioning

confidence: 99%

Section: Xenosmentioning

confidence: 99%

See 1 more Smart Citation

Thermal Radiation Effect on the MHD Turbulent Compressible Boundary Layer Flow with Adverse Pressure Gradient, Heat Transfer and Local Suction

Xenos¹

2017

OJFD

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“…Also to validate the numerical procedure the obtained results have been compared with Miroshnichenko et al [42] results at Ra = 10 10 and ε = 0.3. Figure 2 presents profiles of streamlines in comparison with reference [42] data.…”

Section: Validationmentioning

confidence: 90%

“…Sheikholeslami and Rokni [30] reported the influence of induced magnetic field on nanofluid flow by means of two phase model. Recently, application of nanoparticles in various field have been presented by several studies [31][32][33][34][35][36][37][38][39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of a Corrugated Heat Source Cavity: A Full Convection-Conduction-Radiation Coupling

Sadripour¹

2017

AJAE

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Abstract:In present study a numerical analysis of complex heat transfer (turbulent natural convection, conduction and surface thermal radiation) in a rectangular enclosure with a heat source has been carried out. The finite volume method based on SIMPLEC algorithm has been utilized. The effects of Rayleigh number in a range from 10 8 to 10 11 , internal surface emissivity 0≤ε˂1 on the fluid flow and heat transfer have been extensively explored. Detailed results including temperature fields, flow profiles, and average Nusselt numbers have been presented. In this investigation it has been tried to study the shape of heat source influence on heat transfer and fluid field in the considered domain. According to results in low emissivity values usage of circular obstacles is recommended. Although in high emissivity values using rectangular obstacles lead to more efficiency.

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Optimal design with entropy generation minimization approach in combined natural convection with surface radiation in a two‐dimensional enclosure

Dashti

Ali

2019

Heat Trans. Asian Res.

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Analysis of combined natural convection with surface radiation in a two-dimensional enclosure is carried out. To search the optimal location of the heat source, the entropy generation minimization approach and conventional heat transfer parameters are used and compared. Air is considered as an incompressible fluid and transparent media filling the enclosure with a steady and laminar regime. The enclosure internal surfaces are also gray, opaque, and diffused. The governing equations are solved using the finite difference approach. The results show that with increase in emissivity, entropy generation decreases, and as the Rayleigh number increases, the rate of entropy generation increases. Furthermore, optimum design with the maximum dimensionless temperature and convective Nusselt number confirms the applicability of the second law for optimal design. K E Y W O R D S constant flux heat source, entropy generation minimization, natural convection, optimal search, surface radiation

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Numerical simulation of a conjugate turbulent natural convection combined with surface thermal radiation in an enclosure with a heat source

Cited by 60 publications

References 25 publications

Thermal Radiation Effect on the MHD Turbulent Compressible Boundary Layer Flow with Adverse Pressure Gradient, Heat Transfer and Local Suction

Thermal Radiation Effect on the MHD Turbulent Compressible Boundary Layer Flow with Adverse Pressure Gradient, Heat Transfer and Local Suction

Numerical Investigation of a Corrugated Heat Source Cavity: A Full Convection-Conduction-Radiation Coupling

Optimal design with entropy generation minimization approach in combined natural convection with surface radiation in a two‐dimensional enclosure

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