Natural Convection Heat Transfer Inside Horizontal Circular Enclosure With Triangular Cylinder at Different Angles of Inclination

Mohammed, Akeel Abdullah

doi:10.18186/thermal.849812

Cited by 6 publications

(4 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Chowdhury et al [15] investigated the natural convection of a heated circular body encased in a triangle enclosure system. The results show that increasing heat flux and circular diameter with the same Ra (10 5 ) and Pr (0.71) increases the length of the stream lines.. Akeel et al [16][17][18][19][20][21] studied theoretically different parameters affect the behavior of natural convection heat transfer and fluid flow in an enclosure. Some of these parameters were: porous media, corrugated shape of enclosure and inner cylinder, and nanofluid.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Convection Air Currents Around a Hot Cylinder Inside a Triangular Cavity

Mohammed

Channapattana³

2023

NJES

View full text Add to dashboard Cite

A numerical study was performed of natural laminar convective heat transfer to its concentrated triangular enclosure around a horizontal circular cylinder. The air-filled enclosure kept the inner and outer cylinders at uniform temperatures. The Boussinesq density approximation to the momentum problem and the control volume approach iteratively resolved the governing equations to explain buoyancy. CFD results show that the velocity behavior increases by increasing Ra, so the stream lines becomes more sluggish and less uniform behavior and vortices gets less circulated pattern. The rotation angle ? has significant effect on vortices, at 90o gives the higher range of velocity zones of free convection with higher range. The thermal boundary layer seems to be larger in rr=0.455 as compared with rr=0.345 and decreases by increasing ?. The larger variation of isotherms and thermal boundary layer appears at lower ? because the higher heat transfer rate occurs at higher ? and becomes maximum at 90o. Eight correlations of average Nusselt number have been deduced as a function of Rayleigh number for the taken values of aspect ratio and enclosure angles of rotation and inclination.

show abstract

Section: Introductionmentioning

confidence: 99%

Numerical Study of Convection Air Currents Around a Hot Cylinder Inside a Triangular Cavity

Mohammed

Channapattana³

2023

NJES

View full text Add to dashboard Cite

show abstract

“…In regions of transitional and turbulent flow, the resident Nusselt numbers significantly increase, despite covering only a small portion of the cylinder's surface, according to the researchers' findings. Akeel et al [32][33][34][35] investigated the effect of theoretically distinct parameters on the behavior of natural fluid flow and convection heat transmission within an enclosure. These parameters included porous media, corrugated enclosures and inner cylinder shapes, and nanofluid.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation into Natural Convection Heat Transfer inside Triangular Enclosure with Internal Hot Cylinder

Mohammed,

Channapattanac

2023

NJES

View full text Add to dashboard Cite

Natural convection air heat transfer and fluid movement currents around a hot circular cylinder inside an inclined triangular enclosure has been analyzed experimentally. Three different sizes of an enclosure with a long side of 20, 25, and 30 cm, the thickness of 1 mm, and depth of 50 cm were used in the present work to give three radius ratios. The effect of Rayleigh number, radius ratio, the rotation angle of triangle enclosure, and the inclination angle of the apparatus with horizontal axis ? on the heat transfer process was investigated. The ranges of these parameters were: Rayleigh number from 5×106 to 2.5×108, radius ratio (0.345, 0.455, and 0.618), rotation angle (0o, 45o, and 90o), and inclination angle (0o, 45o and 90o). The results show that the heat transfer rates increase with increase in Rayleigh number and as the rotation angle of enclosure is changed from 0o to 90o. Moreover, the heat transfer rate increases linearly with Rayleigh number at higher radius at rotation angle 0o, 90o only. While, it increases slightly with Rayleigh number at rotation angle 45o. Additionally, the higher heat transfer rates occur at vertical position of enclosure inclination angle 90o and rotation angle 0o (the base of triangle at the bottom) and it decreases as inclination angle deviates from 90o to 0o. This behavior is reverse completely at higher radius ratio 0.618. Empirical correlations for the average Nusselt number has been found to depend on Rayleigh number., radius ratio, rotation angle and inclination angle.

show abstract

“…In general, several scientific researchers have studied flow dynamics and heat transfer in both two and three-dimensional [1]- [4] configurations in various geometric shapes [5]- [14].Due to its high performance and limited energy demand, a study of laminar mixed convection cooling of a rectangular cavity with a constant source of heat flow was the subject of [15]to identify optimum location of inlet and outlet for better cooling efficiency. For various ventilation arrangements, free and forced convection was investigated in a rectangular enclosure with a source heated from below.…”

Section: Introductionmentioning

confidence: 99%

Effect of the position of the hot source on mixed convection in a rectangular cavity

Sereir

Missoum

MEBARKI

et al. 2022

Journal of Thermal Engineering

View full text Add to dashboard Cite

This work presents a study by numerical simulation of mixed convection in a rectangular cavity with a sinusoidal temperature imposed on the right vertical wall while the other wall on the left is kept at a cold temperature. The upper and lower walls are thermally insulated, the inlet and outlet ports are respectively located on the hot wall to the bottom and on the top to the left. The enclosure represents a practical system such as an air-cooled electronic device, the heat source represents a radiator or an electronic component located in three different positions towards the left side at the bottom, the center and towards the right side at the top in such an enclosure. All calculations are made for a range of Richardson number from 0 to 10 and Reynolds numbers from 50 to 200. The influence of Richardson number, the position of the heat source and the influence of amplitude and phase deviation of the temperature imposed on the Nusselt number on the hot surface is studied. The results are presented in the form of streamlines and isotherms graphs as well as the variation in maximum temperature and mean Nusselt number under different conditions. The numerical resolution of the governing equations is obtained using the software of Multiphysics Comsol based on the finite element method.

show abstract

Natural Convection Heat Transfer Inside Horizontal Circular Enclosure With Triangular Cylinder at Different Angles of Inclination

Cited by 6 publications

References 17 publications

Numerical Study of Convection Air Currents Around a Hot Cylinder Inside a Triangular Cavity

Numerical Study of Convection Air Currents Around a Hot Cylinder Inside a Triangular Cavity

Experimental Investigation into Natural Convection Heat Transfer inside Triangular Enclosure with Internal Hot Cylinder

Effect of the position of the hot source on mixed convection in a rectangular cavity

Contact Info

Product

Resources

About