NUMERICAL STUDY OF NATURAL CONVECTION OF NANOFLUID IN A SQUARE CAVITY WITH HOT AND COLD ELEMENTS ON ITS VERTICAL WALLS

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SHEIKHZADEH GH.A.; MAHMOODI M.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Paper Information

Journal: JOURNAL OF COMPUTATIONAL METHODS IN ENGINEERING (ESTEGHLAL) Year:2011 | Volume:30 | Issue:1 Page(s): 79-96

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Title

NUMERICAL STUDY OF NATURAL CONVECTION OF NANOFLUID IN A SQUARE CAVITY WITH HOT AND COLD ELEMENTS ON ITS VERTICAL WALLS

Author(s)

SHEIKHZADEH GH.A. | MAHMOODI M. | Issue Writer Certificate

Keywords

NUMERICAL ANALYSISQ2

FREE CONVECTIONQ2

SQUARE CAVITYQ1

NANO FLUIDQ2

THERMAL ELEMENTSQ2

Abstract

Free convection of Ag-water NANO FLUID in a SQUARE CAVITY with two or three pairs of hot and cold discrete elements on its side walls is simulated and the effects of number and arrangement of THERMAL ELEMENTS and volume fraction of nanoparticles on the fluid flow and heat transfer are studied. Volume fraction of nanoparticles ranges from 0 to 0.2. Several different arrangements of the THERMAL ELEMENTS are considered in a manner that for each case, numbers of vortexes formed inside the cavity are different. The obtained results show that by increasing the Rayleigh number, the number of vortexes, and the volume fraction of the nanoparticles, the rate of heat transfer is increased. Also it is observed that when the number of formed vortexes inside the cavity increases, the effect of increasing the volume fraction of the nanoparticles on the heat transfer rate is enhanced. When six vortexes are formed in the cavity at Ra=106, by increasing the volume fraction of nanoparticles from 0 to 0.2, the average Nusselt number increases about 60% with respect to the base fluid, while for the case of four vortexes, the increasing is about 35%. Moreover it is found that at all the considered Rayleigh numbers, the average Nusselt number is more sensitive to the nanoparticles volume fraction than to the number of formed vortexes.

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APA: Copy

SHEIKHZADEH, GH.A., & MAHMOODI, M.. (2011). NUMERICAL STUDY OF NATURAL CONVECTION OF NANOFLUID IN A SQUARE CAVITY WITH HOT AND COLD ELEMENTS ON ITS VERTICAL WALLS. JOURNAL OF COMPUTATIONAL METHODS IN ENGINEERING (ESTEGHLAL), 30(1), 79-96. SID. https://sid.ir/paper/173610/en

Vancouver: Copy

SHEIKHZADEH GH.A., MAHMOODI M.. NUMERICAL STUDY OF NATURAL CONVECTION OF NANOFLUID IN A SQUARE CAVITY WITH HOT AND COLD ELEMENTS ON ITS VERTICAL WALLS. JOURNAL OF COMPUTATIONAL METHODS IN ENGINEERING (ESTEGHLAL)[Internet]. 2011;30(1):79-96. Available from: https://sid.ir/paper/173610/en

IEEE: Copy

GH.A. SHEIKHZADEH, and M. MAHMOODI, “NUMERICAL STUDY OF NATURAL CONVECTION OF NANOFLUID IN A SQUARE CAVITY WITH HOT AND COLD ELEMENTS ON ITS VERTICAL WALLS,” JOURNAL OF COMPUTATIONAL METHODS IN ENGINEERING (ESTEGHLAL), vol. 30, no. 1, pp. 79–96, 2011, [Online]. Available: https://sid.ir/paper/173610/en

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