Mixed convection heat transfer from a horizontal plate to non-newtonian fluids

Wang, Tian-Yih

doi:10.1016/0735-1933(93)90038-w

Cited by 5 publications

(3 citation statements)

References 12 publications

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“…Wang [13] analyzed the heat transfer characteristics of the steady laminar mixed convection of non-Newtonian uids over a horizontal plate using the boundary layer equations, for the power-law viscosity index and the generalized Prandtl number. Gorla et al [14] presented the effect of viscosity index on the surface heat transfer rate of a non-similar boundary layer analysis for the problem of mixed convection in power-law type non-Newtonian¯uids along horizontal surfaces with variable wall temperature distribution.…”

Section: Introductionmentioning

confidence: 99%

On thermal boundary layer of a non-Newtonian fluid on a power-law stretched surface of variable temperature with suction or injection

Tashtoush¹,

Kodah²,

Al-Ghasem³

2001

Heat and Mass Transfer

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Heat transfer characteristics of a non-Newtonian uid on a power-law stretched surface of variable temperature with suction or injection were investigated. Similarity solutions of the laminar boundary layer equations describing heat transfer and¯uid¯ow in a quiescent uid were obtained and solved numerically. Velocity and temperature pro®les as well as the Nusselt number, Nu, were studied for two thermal boundary conditions; uniform surface temperature and variable surface temperature, for different parameters; Prandtl number Pr, temperature exponent b, velocity exponent m, injection parameter d and power-law index n. It was found that decreasing injection parameter d, and power-law index n and increasing Prandtl number Pr and surface temperature exponent b enhance the heat transfer coef®cient.

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Section: Introductionmentioning

confidence: 99%

On thermal boundary layer of a non-Newtonian fluid on a power-law stretched surface of variable temperature with suction or injection

Tashtoush¹,

Kodah²,

Al-Ghasem³

2001

Heat and Mass Transfer

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“…The appropriate boundary conditions in (8) form a part of this system, which is solved by using Newton-Raphson method. The resulting system of linear algebraic equations, which turns out to be a tridiagonal Kim et al (1993) Haung and Lin (1993) Wang (1993, 1995 system, has been solved by a method suggested in Cebeci and Bradshaw (1984). The choice of initial guess in Newton-Raphson method and the numerical Á ∞ , which depends on the physical parameter n, and Pr is very crucial in the numerical procedure.…”

Section: Numerical Solutionmentioning

confidence: 99%

“…Haung and Lin (1993) solved the problem of mixed convection from a vertical plate to power-law fluids. Wang (1993Wang ( , 1995 presented a boundary layer analysis for a laminar mixed convection from a vertical or horizontal plate to non-Newtonian fluids. Pop and Gorla (1991) presented similarity solutions for the mixed convection in non-Newtonian fluids from stationary or moving horizontal surfaces.…”

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confidence: 99%

Mixed convection flow of non‐Newtonian fluid from a slotted vertical surface with uniform surface heat flux

2009

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In the present paper, the combined convection flow of an Ostwald-de Waele type power-law non-Newtonian fluid past a vertical slotted surface has been investigated numerically. The boundary condition of uniform surface heat flux is considered. The equations governing the flow and the heat transfer are reduced to local non-similarity form. The transformed boundary layer equations are solved numerically using implicit finite difference method. Solutions for the heat transfer rate obtained for the rigid surface compare well with those documented in the published literature. From the present analysis, it is observed that, an increase in leads to increase in skin friction as well as reduction in heat transfer at the surface. As the power-law index n increases, the friction factor as well as heat transfer increase.Dans cet article, on aétudié numériquement l'écoulement de convection combinée d'un fluide non-newtonien de loi de puissance de type Ostwald-de Waele en aval d'une surface perforée verticale. La condition limite d'un flux de chaleur de surface uniforme est considérée. Leś equations gouvernant l'écoulement et le transfert de chaleur sont réduitesà la forme de non-similarité locale. Leséquations de couche limite transformées sont résolues numériquement par la méthode des différences finies implicites. Les solutions pour la vitesse de transfert de chaleur obtenues pour la surface rigide se comparent bienà celles qui sont décrites dans la littérature scientifique publiée.À partir de la présente analyse, on observe qu'une augmentation de mèneà une augmentation du frottement superficiel ainsi qu'à une réduction du transfert de chaleurà la surface. Lorsque l'indice de loi de puissance n augmente, le facteur de friction et le transfert de chaleur augmententégalement.

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