SINGLE PHASE AND TWO PHASE ANALYSIS OF MIXED CONVECTION OF NANOFLUID FLOW IN VERTICAL RECTANGULAR DUCT UNDER AN ASYMMETRIC THERMAL BOUNDARY CONDITION

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BAZDIDI TEHRANI FARZAD; SEDAGHATNEJAD MOHAMMAD; EKRAMI NAEEM; VASEFI IMAN

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Journal: Modares Mechanical Engineering Year:2015 | Volume:14 | Issue:13 Page(s): 47-58

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Title

SINGLE PHASE AND TWO PHASE ANALYSIS OF MIXED CONVECTION OF NANOFLUID FLOW IN VERTICAL RECTANGULAR DUCT UNDER AN ASYMMETRIC THERMAL BOUNDARY CONDITION

Author(s)

BAZDIDI TEHRANI FARZAD | SEDAGHATNEJAD MOHAMMAD | EKRAMI NAEEM | VASEFI IMAN | Issue Writer Certificate

Keywords

NANOFLUIDSQ2

VERTICAL DUCTQ1

MIXED CONVECTIONQ2

EULER-LAGRANGEQ2

ASYMMETRIC THERMAL BOUNDARY CONDITIONQ2

Abstract

In the present paper, MIXED CONVECTION of TiO2-water nanofluid in a laminar flow within a vertical rectangular duct is investigated numerically. A single phase and a two phase method is applied to simulate nanoparticles dispersion in the base fluid. An EULER-LAGRANGE approach is employed to track particles individually. In this approach, the base fluid is assumed to be a continuous phase while the particles are dispersed through it. The presence of particles in the base fluid is modeled as a source term in the momentum and energy equations. Governing equations are discretized using Control Volume based Finite Element Method (CVFEM). Effects of nanoparticles concentration, particles size, aspect ratio of cross section, asymmetrical boundary condition and buoyancy on the hydrodynamics and thermal parameters are presented and discussed. It is observed that increasing nanoparticles concentration enhances heat transfer rate and this enhancement is more considerable in higher aspect ratios. Also, at smaller values of Richardson number (Ri) where the effect of forced convection is more than natural convection, dispersion of nanoparticles in the base fluid improves heat transfer rate more considerably. Whilst an improvement in convective heat transfer is shown to be more than 6.5% at Ri=0.5, it does not exceed 4% at Ri=5.

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APA: Copy

BAZDIDI TEHRANI, FARZAD, SEDAGHATNEJAD, MOHAMMAD, EKRAMI, NAEEM, & VASEFI, IMAN. (2015). SINGLE PHASE AND TWO PHASE ANALYSIS OF MIXED CONVECTION OF NANOFLUID FLOW IN VERTICAL RECTANGULAR DUCT UNDER AN ASYMMETRIC THERMAL BOUNDARY CONDITION. MODARES MECHANICAL ENGINEERING, 14(13), 47-58. SID. https://sid.ir/paper/179701/en

Vancouver: Copy

BAZDIDI TEHRANI FARZAD, SEDAGHATNEJAD MOHAMMAD, EKRAMI NAEEM, VASEFI IMAN. SINGLE PHASE AND TWO PHASE ANALYSIS OF MIXED CONVECTION OF NANOFLUID FLOW IN VERTICAL RECTANGULAR DUCT UNDER AN ASYMMETRIC THERMAL BOUNDARY CONDITION. MODARES MECHANICAL ENGINEERING[Internet]. 2015;14(13):47-58. Available from: https://sid.ir/paper/179701/en

IEEE: Copy

FARZAD BAZDIDI TEHRANI, MOHAMMAD SEDAGHATNEJAD, NAEEM EKRAMI, and IMAN VASEFI, “SINGLE PHASE AND TWO PHASE ANALYSIS OF MIXED CONVECTION OF NANOFLUID FLOW IN VERTICAL RECTANGULAR DUCT UNDER AN ASYMMETRIC THERMAL BOUNDARY CONDITION,” MODARES MECHANICAL ENGINEERING, vol. 14, no. 13, pp. 47–58, 2015, [Online]. Available: https://sid.ir/paper/179701/en

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