Integral analysis of laminar indirect free convection boundary layers with weak blowing for Schmidt no. ~ 1

Details Integral analysis of laminar indirect free convection boundary layers with weak blowing for Schmidt no. ~ 1 Integral analysis of laminar indirect free convection boundary layers with weak blowing for Schmidt no. ~ 1

2004-07-31

arxiv.org/abs/physics/0408002v1

International Communications in heat and mass transfer,Vol31,No8, 2004, pp 1199 -1208

Physics

Fluid Dynamics

10 pages, published in International Communications in heat and mass transfer,Vol31,No8, 2004, pp 1199 -1208

Scientific paper

10.1016/j.icheatmasstransfer.200

Laminar natural convection at unity Schmidt number over a horizontal surface with a weak normal velocity at the wall is studied using an integral analysis. To characterise the strength of the blowing, we define a non-dimensional parameter called the blowing parameter. After benchmarking with the no blowing case, the effect of the blowing parameter on boundary layer thickness, velocity and concentration profiles is obtained. Weak blowing is seen to increase the wall shear stress. For blowing parameters greater than unity, the diffusional flux at the wall becomes negligible and the flux is almost entirely due to the blowing.

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