On the use of lattice Boltzmann model for simulating dean flow of non-Newtonian fluids in curved square ducts

Salehi-Shabestari, A.; Sadeghy, Kayvan; Raisee, Mehrdad

doi:10.1016/j.cnsns.2012.03.026

Cited by 3 publications

(2 citation statements)

References 38 publications

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“…Sasmito et al (2011) numerically investigated the laminar heat transfer enhancement in coiled square tubes for water-Al 2 O 3 and water-CuO nanofluids.Entropy generation for temperature variable viscosity in a laminar flow in a curved square microchannel was numerically examined by Guo et al (2012) for constant wall temperature boundary condition. Shabestari et al (2012)numerically studied the isothermal, incompressible, steady and fully developed laminar flow in a curved square duct. Soltanipour et al (2012) carried out a numerical study in a curved square duct with longitudinal rectangular rib on the inner surface of the outer wall of the curved duct for laminar flow.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Flow and Heat Transfer in a Curved Square Duct with Longitudinal Triangular Rib Using Al2O3/Water Nanofluid

Celen¹,

Evran²,

Turgut³

et al. 2018

AJTE

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Flow and heat transfer characteristics in curved ducts are different from that of straight ducts. A numerical study of a steady and three dimensional laminar flow in a 180o curved square duct with longitudinal isosceles triangular rib has been conducted to investigate the effects of rib height, Dean number and volume fraction of Al2O3/water nanofluid on flow and heat transfer characteristics. ANSYS Fluent 17.0 commercial program is used for numerical simulation. Study is implemented for six Dean numbers changing from 250 to 1500, three different rib heights, and eight volume fractions varying from 0% to 5%. Velocity and temperature regions, heat transfer coefficient (h), pressure loss (investigated. Present results are compared with the literature results. It is seen that present results are in good agreement with the results of literature. Results show that Dean number (De), rib height (H) and volume fraction of nanofluid (vof) affect the heat transfer coefficient and pressure drop. It is seen that heat transfer coefficient may be increased by 59.0% for water as the working fluid when longitudinal isosceles triangular rib is used in curved square duct compared to ribless duct. Heat transfer coefficient may also be augmented by 30.8% using nanofluid as the working fluid in a curved square duct with rib. Results show that using longitudinal isosceles triangular rib in a curved square duct is advantageous.

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Section: Introductionmentioning

confidence: 99%

Numerical Study of Flow and Heat Transfer in a Curved Square Duct with Longitudinal Triangular Rib Using Al2O3/Water Nanofluid

Celen¹,

Evran²,

Turgut³

et al. 2018

AJTE

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show abstract

“…Since the work realized by Dean [3] and [4] where he initiated theoretical studies of viscous flow, the curved pipes are widely studied numerically and experimentally. The Dean vortexes formed in these ducts have a significant effect on the pressure loss and heat transfer of non-Newtonian fluids flow [5][6][7][8]. The second alternative method is to create chaotic trajectories [9] while keeping the laminar flow that ensures the efficient stretching and folding of material lines.…”

Section: Introductionmentioning

confidence: 99%

HCharacterization of Pressure Drops and Heat Transfer of Non-Newtonian Power-Law Fluid Flow Flowing in Chaotic Geometry

Naas¹,

Lasbet²,

Boutarfaïa³

et al. 2016

IJHT

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In this work, a numerical study is carried out by using CFD code to investigate a steady laminar flow of nonNewtonian power-law fluids in two geometries: complex geometry, called C-shaped, and straight channel. Cshaped geometry is a three-dimensional mini-channel of square cross-section. The chaotic flows created in this geometry enhance considerably the flow and the heat transfer performances. These performances are reported for a fixed geometry over a range of generalized Reynolds number (Reg=50-200) and power law index (n = 0.5-1). The higher heat transfer performance is provided by the C-shaped geometry and the lower pressure drops are obtained for the straight channel. However, the better compromise (improving heat transfer -diminution pressure drops) is for the C-shaped channel. This is evaluated via the calculation of the ratio between the Nusselt number and the Poiseuille number Nu/Po.

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Dean instability of Giesekus fluids in azimuthal flow between two fixed, infinitely-long, concentric cylinders at arbitrary gap spacings

Pourjafar

Sadeghy

2012

Journal of Non-Newtonian Fluid Mechanics

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On the use of lattice Boltzmann model for simulating dean flow of non-Newtonian fluids in curved square ducts

Cited by 3 publications

References 38 publications

Numerical Study of Flow and Heat Transfer in a Curved Square Duct with Longitudinal Triangular Rib Using Al2O3/Water Nanofluid

Numerical Study of Flow and Heat Transfer in a Curved Square Duct with Longitudinal Triangular Rib Using Al2O3/Water Nanofluid

HCharacterization of Pressure Drops and Heat Transfer of Non-Newtonian Power-Law Fluid Flow Flowing in Chaotic Geometry

Dean instability of Giesekus fluids in azimuthal flow between two fixed, infinitely-long, concentric cylinders at arbitrary gap spacings

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