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This study proposes a low Reynolds number k-epsilon turbulent model which can be applied to flows with a wide range of blowing or suction.It is improved from the Lam-Bremhorst low Reynolds number turbulent model without blowing and suction.The model is tested in the flat-plate flow. The results show that not only the predicted velocity profile, shear stress distribution and drag coefficient(Cf),but also the turbulent viscosity are all in good agreement with available expermental data.An quantitative analysis of k and epsilon is also included in the present work. For thermal turbulent-boundary-layer with wall blowing in addition to the turbulent model proposed , this study also proposes a turbulent Prandtl number expression. It is a function of y+ and blowing parameter. Tested in the thermal turbulent-boundary-layer over a proposed turbulent model and turbulent Prandtl number expression can yield temperature distributions and St which are in good with experimental data.
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