BUOYANCY-DRIVEN CONVECTION OF NANOPARTICLE-WATER MIXTURE (NANOFLUID) NEAR ITS DENSITY MAXIMUM IN A HORIZONTAL CONCENTRIC CYLINDRICAL ANNULUS

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KASHANI S.; KHOSHNEVIS A.B.

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Seminar Paper

Paper Information

Seminar: INTERNATIONAL CONFERENCE ON RESEARCH IN SCIENCE AND TECHNOLOGY
Year:2015 | Issue:1

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Title

BUOYANCY-DRIVEN CONVECTION OF NANOPARTICLE-WATER MIXTURE (NANOFLUID) NEAR ITS DENSITY MAXIMUM IN A HORIZONTAL CONCENTRIC CYLINDRICAL ANNULUS

Author(s)

KASHANI S. | KHOSHNEVIS A.B. | Issue Writer Certificate

Keywords

NANOFLUID

NATURAL CONVECTION

DENSITY INVERSION

NON- BOUSSINESQ MODEL

Abstract

LAMINAR NATURAL CONVECTION OF CU-WATER NANOFLUID NEAR DENSITY MAXIMUM OF WATER IN A TWO-DIMENSIONAL HORIZONTAL CONCENTRIC CYLINDRICAL ANNULUS IS INVESTIGATED NUMERICALLY. THE GOVERNING EQUATIONS BASED ON THE NON-BOUSSINESQ HOMOGENOUS MODEL ARE SOLVED ON A NON-UNIFORM TYPE MESH USING A PRESSURE-BASED FINITE VOLUME METHOD. CALCULATION IS PERFORMED FOR RA=105 AND NANOPARTICLE VOLUME FRACTION FROM 0 TO 0.08. NUMERICAL RESULTS ARE PRESENTED IN THE TERMS OF STREAMLINES, ISOTHERMS, VELOCITY VECTORS AND LOCAL AND AVERAGE NUSSELT NUMBER. IT IS FOUND THAT THE DENSITY INVERSION AND THE PRESENCE OF NANOPARTICLES BOTH PLAY A SIGNIFICANT ROLE IN THE FLOW FIELD STRUCTURE AND HEAT TRANSFER CHARACTERISTICS. IT CAN BE CONCLUDED THAT BOUSSINESQ APPROXIMATION GIVES RISE TO THE HIGHER AVERAGE HEAT TRANSFER RATE AS COMPARED TO NON-BOUSSINESQ APPROXIMATION. IN ADDITION, THE AVERAGE NUSSELT NUMBER DECREASES AS THE VOLUME FRACTION OF NANOPARTICLE INCREASES. FINALLY, THE PRESENT NUMERICAL RESULTS VERIFY THE DETERMINING EFFECT OF THE DENSITY INVERSION OF WATER ON THE CONVECTION CHARACTER BECAUSE OF THE FORMATION BI-CELLULAR STRUCTURE.

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APA: Copy

KASHANI, S., & KHOSHNEVIS, A.B.. (2015). BUOYANCY-DRIVEN CONVECTION OF NANOPARTICLE-WATER MIXTURE (NANOFLUID) NEAR ITS DENSITY MAXIMUM IN A HORIZONTAL CONCENTRIC CYLINDRICAL ANNULUS. INTERNATIONAL CONFERENCE ON RESEARCH IN SCIENCE AND TECHNOLOGY. SID. https://sid.ir/paper/928899/en

Vancouver: Copy

KASHANI S., KHOSHNEVIS A.B.. BUOYANCY-DRIVEN CONVECTION OF NANOPARTICLE-WATER MIXTURE (NANOFLUID) NEAR ITS DENSITY MAXIMUM IN A HORIZONTAL CONCENTRIC CYLINDRICAL ANNULUS. 2015. Available from: https://sid.ir/paper/928899/en

IEEE: Copy

S. KASHANI, and A.B. KHOSHNEVIS, “BUOYANCY-DRIVEN CONVECTION OF NANOPARTICLE-WATER MIXTURE (NANOFLUID) NEAR ITS DENSITY MAXIMUM IN A HORIZONTAL CONCENTRIC CYLINDRICAL ANNULUS,” presented at the INTERNATIONAL CONFERENCE ON RESEARCH IN SCIENCE AND TECHNOLOGY. 2015, [Online]. Available: https://sid.ir/paper/928899/en

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