Numerical study of mixed convection flows in a lid-driven enclosure filled with nanofluid using variable properties

Sheikhzadeh, Ghanbar Ali; Qomi, M Ebrahim; Hajialigol, N.; Fattahi, Abolfazl

doi:10.1016/j.rinp.2012.01.001

Cited by 32 publications

(15 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…k b = 1.3807×10 -23 J/K, is the Boltzmann constant and l f = 0.17 nm is the mean path of fluid particles [13,14]. The viscosity of the nanoparticle (Al 2 O 3 ) as given by Sheikhzadeh et al [14] and Nguyen et al [15] is: …”

Section: The Problem Formulationmentioning

confidence: 99%

“…The viscosity of the nanoparticle (Al 2 O 3 ) as given by Sheikhzadeh et al [14] and Nguyen et al [15] is: …”

Section: The Problem Formulationmentioning

confidence: 99%

“…This computer code has also been validated in previous work [14]. In order to more validation, the average Nusselt and Sherwood numbers on the source section are compared to the results of the other researcheres as shown in Tables 2 and 3.…”

Section: Benchmarking Of the Codementioning

confidence: 99%

See 2 more Smart Citations

Double-diffusive natural convection of Al2O3-water nanofluid in an enclosure with partially active side walls using variable properties

2014

Self Cite

View full text Add to dashboard Cite

Natural convection heat and mass transfer characteristics in a square enclosure using variable thermal conductivity and variable viscosity are numerically studied. The fluid in the enclosure is a water-based nanofluid containing Al 2 O 3 nanoparticles. The top and bottom horizontal walls are insulated, while a source (T h , C h ) and a sink (T c , C c ) are located at the vertical left and right walls as active parts, respectively, with T h >T c and C h >C c . The governing equations in the two-dimensional space are discretized using the control volume method. A proper upwinding scheme is employed to obtain stabilized solutions. The study has been carried out for the Rayleigh numbers of 10 4 to 10 6 , the buoyancy ratios of -5~5, and different configurations of the source and sink. Results are presented in the form of the streamlines, isotherms and iso-concentraions as well as the average Nusselt and Sherwood numbers. It is observed that average Nusselt number is increased by adding the nanoparticles, while average Sherwood number is reduced. Moreover, both Nusselt and Sherwood number are increased as absolute value of the buoyancy ratio or Rayleigh number is increased.

show abstract

Section: The Problem Formulationmentioning

confidence: 99%

“…The viscosity of the nanoparticle (Al 2 O 3 ) as given by Sheikhzadeh et al [14] and Nguyen et al [15] is: …”

Section: The Problem Formulationmentioning

confidence: 99%

See 1 more Smart Citation

Double-diffusive natural convection of Al2O3-water nanofluid in an enclosure with partially active side walls using variable properties

2014

Self Cite

View full text Add to dashboard Cite

show abstract

“…Also, as the Reynolds number increases, the e ect of nanoparticles volume fraction on the ow pattern and thermal behavior decreases. Sheikhzadeh et al [33] studied the e ects of variable properties of Al 2 O 3 -water nano uid on the mixed convection heat transfer characteristics in a lid-driven cavity. They employed the Chon et al model [17] and Abu-Nada et al model [16] in order to predict the thermal conductivity and viscosity of nano uid, respectively, and compared the obtained results with those of the Maxwell model [11] and Brinkman model [14].…”

Section: Introductionmentioning

confidence: 99%

Effects of uncertainties of conductivity models on mixed convection for Al2O3-water nano fluid

Abbasian

Yazdeli

2016

Scientia Iranica

View full text Add to dashboard Cite

Abstract. The present numerical study aims to investigate the e ects of uncertainties of di erent conductivity models on mixed convection uid ow and heat transfer in a square cavity lled with Al2O3-water nano uid. The left and right vertical sides of enclosure are maintained at high and low constant temperatures, respectively, while the bottom and top horizontal sides of the enclosure are kept insulated. Furthermore, the right wall moves from down to up with a constant velocity, Vp. To approximate the nano uid e ective thermal conductivity, ve most commonly used models, namely, Maxwell, Khanafer and Vafai, Corcione, Chon et al., and Patel et al., are employed. Finite volume method and SIMPLER algorithm are used in order to discretize the governing equations. Simulations are performed for nanoparticles volume fraction ranging from 0 to 0.05 and Richardson number ranging between 0.01 and 100. The results indicate that there are signi cant di erences between the average Nusselt numbers predicted by the ve employed conductivity models.

show abstract

“…They concluded that in all ranges of examined Richardson numbers, the heat transfer rate is increased by enhancement of the nanoparticle volume fraction and movement of the vertical wall toward both directions. Sheikhzadeh et al (2012), analyzed mixed convection heat transfer and fluid flow of Al2O3-water nanofluid in a square enclosure using finite volume numerical method. Top wall moves at constant velocity, horizontal walls were isolated and vertical walls were kept at low and high constant temperatures in right and left side, respectively.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Mixed Convection Fluid Flow, Heat Transfer and Entropy Generation in Triangular Enclosure Filled with a Nanofluid

Aghaei

Sheikhzadeh

Ehteram

et al. 2016

JAFM

View full text Add to dashboard Cite

In this paper, mixed convection fluid flow, heat transfer and entropy generation inside a triangular enclosure filled with CuO-water nanofluid with variable properties are investigated numerically. The inclined walls of enclosure are maintained at a constant temperature T c . The moving bottom wall is kept at a constant temperature T h , which T h >T c .The numerical simulation of mixed convection is carried out using a computer program (FORTRAN language) based on finite volume method and SIMPLER algorithm. This study is performed over a range of nanoparticle volume fractions(0-0.02-0. ).In all investigated aspect ratios and Richardson numbers, average Nusselt number increased by enhancement of volume fraction till 0.02, but it is approximately constant by adding more nanoparticles till 0.04.It is also observed that in all aspect ratios and Richardson numbers, the variation of total entropy generation by enhancement of volume fraction is similar to Nusselt number.

show abstract

Numerical study of mixed convection flows in a lid-driven enclosure filled with nanofluid using variable properties

Cited by 32 publications

References 14 publications

Double-diffusive natural convection of Al2O3-water nanofluid in an enclosure with partially active side walls using variable properties

Double-diffusive natural convection of Al2O3-water nanofluid in an enclosure with partially active side walls using variable properties

Effects of uncertainties of conductivity models on mixed convection for Al2O3-water nano fluid

Numerical Investigation of Mixed Convection Fluid Flow, Heat Transfer and Entropy Generation in Triangular Enclosure Filled with a Nanofluid

Contact Info

Product

Resources

About