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Applications of Nanofluid for Heat Transfer Enhancement by Davood Domairry Ganji, Mohsen Sheikholeslami

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9.3. Heated permeable stretching surface in a porous medium using Nanofluid

9.3.1. Problem definition

Consider the steady, two-dimensional flow of a nanofluid near the stagnation point on a stretching sheet saturated at a porous surface (highly permeable) as shown in Fig. 9.14 [21]. The stretching velocity Uw(x) and the free stream velocity U(x) are assumed to vary proportional to the distance x from the stagnation point, that is, Uw(x) = ax and U(x) = bx, where a and b are constants with a > 0 and b ≥ 0. It is assumed that the temperature at the stretching surface takes the constant values Tw, while the temperature of the ambient nanofluid, attained as y tends to infinity, takes the constant values T. The fluid is a water-based nanofluid containing ...

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