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Mixed convective boundary layer flow over a vertical wedge embedded in a porous medium saturated with a nanofluid: Natural Convection Dominated Regime.

Gorla RS, Chamkha AJ, Rashad AM - Nanoscale Res Lett (2011)

Bottom Line: A boundary layer analysis is presented for the mixed convection past a vertical wedge in a porous medium saturated with a nano fluid.A parametric study illustrating the influence of various physical parameters is performed.Numerical results for the velocity, temperature, and nanoparticles volume fraction profiles, as well as the friction factor, surface heat and mass transfer rates have been presented for parametric variations of the buoyancy ratio parameter Nr, Brownian motion parameter Nb, thermophoresis parameter Nt, and Lewis number Le.

View Article: PubMed Central - HTML - PubMed

Affiliation: Cleveland State University, Cleveland, OH 44115 USA. r.gorla@csuohio.edu.

ABSTRACT
A boundary layer analysis is presented for the mixed convection past a vertical wedge in a porous medium saturated with a nano fluid. The governing partial differential equations are transformed into a set of non-similar equations and solved numerically by an efficient, implicit, iterative, finite-difference method. A parametric study illustrating the influence of various physical parameters is performed. Numerical results for the velocity, temperature, and nanoparticles volume fraction profiles, as well as the friction factor, surface heat and mass transfer rates have been presented for parametric variations of the buoyancy ratio parameter Nr, Brownian motion parameter Nb, thermophoresis parameter Nt, and Lewis number Le. The dependency of the friction factor, surface heat transfer rate (Nusselt number), and mass transfer rate (Sherwood number) on these parameters has been discussed.

No MeSH data available.


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Velocity, temperature, and concentration profiles for various values of velocity exponent (m).
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Figure 6: Velocity, temperature, and concentration profiles for various values of velocity exponent (m).

Mentions: Figure 2 indicates that, as Nr increases, the velocity decreases, and the temperature and concentration increase. Similar effects are observed from Figures 3 and 4 as Nt and Nb vary. Figure 5 illustrates the variation of velocity within the boundary layer as Le increases. The velocity increases as Le increases. As Le increases, the temperature and concentration within the boundary layer decrease and the thermal and concentration boundary later thicknesses decrease. Figure 6 shows that as the wedge angle parameter m increases, the velocity, temperature, and concentration decrease.


Mixed convective boundary layer flow over a vertical wedge embedded in a porous medium saturated with a nanofluid: Natural Convection Dominated Regime.

Gorla RS, Chamkha AJ, Rashad AM - Nanoscale Res Lett (2011)

Velocity, temperature, and concentration profiles for various values of velocity exponent (m).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211263&req=5

Figure 6: Velocity, temperature, and concentration profiles for various values of velocity exponent (m).
Mentions: Figure 2 indicates that, as Nr increases, the velocity decreases, and the temperature and concentration increase. Similar effects are observed from Figures 3 and 4 as Nt and Nb vary. Figure 5 illustrates the variation of velocity within the boundary layer as Le increases. The velocity increases as Le increases. As Le increases, the temperature and concentration within the boundary layer decrease and the thermal and concentration boundary later thicknesses decrease. Figure 6 shows that as the wedge angle parameter m increases, the velocity, temperature, and concentration decrease.

Bottom Line: A boundary layer analysis is presented for the mixed convection past a vertical wedge in a porous medium saturated with a nano fluid.A parametric study illustrating the influence of various physical parameters is performed.Numerical results for the velocity, temperature, and nanoparticles volume fraction profiles, as well as the friction factor, surface heat and mass transfer rates have been presented for parametric variations of the buoyancy ratio parameter Nr, Brownian motion parameter Nb, thermophoresis parameter Nt, and Lewis number Le.

View Article: PubMed Central - HTML - PubMed

Affiliation: Cleveland State University, Cleveland, OH 44115 USA. r.gorla@csuohio.edu.

ABSTRACT
A boundary layer analysis is presented for the mixed convection past a vertical wedge in a porous medium saturated with a nano fluid. The governing partial differential equations are transformed into a set of non-similar equations and solved numerically by an efficient, implicit, iterative, finite-difference method. A parametric study illustrating the influence of various physical parameters is performed. Numerical results for the velocity, temperature, and nanoparticles volume fraction profiles, as well as the friction factor, surface heat and mass transfer rates have been presented for parametric variations of the buoyancy ratio parameter Nr, Brownian motion parameter Nb, thermophoresis parameter Nt, and Lewis number Le. The dependency of the friction factor, surface heat transfer rate (Nusselt number), and mass transfer rate (Sherwood number) on these parameters has been discussed.

No MeSH data available.


Related in: MedlinePlus