M. Moeini - Department of Civil Engineering, Amirkabir University of Technology, Tehran, Iran
M. R. Chamani - Department of Civil Engineering, Isfahan University of Technology, Isfahan, Iran

This study proposes a semi-analytic approximation to the laminar boundary layer growth in a polarized pressure field with temperature gradient represented by the joint Blasius-energy equation. We illuminate that is a probability density function (PDF) approximated by an amended Gaussian PDF with zero mean and standard deviation . This implies a diffusive structure for the molecular momentum conversion as well as the energy flux in the boundary layer. A new limit for the boundary layer edge is also presented. Results suggest an augmented boundary layer when compared to accepted values in the literature. We also reproduce the inverse proportionality of the free stream velocity to the diffusion of both momentum and energy.

Blasius laminar flow, Semi, analytic approximation, Boundary layer thickness, Momentum diffusion, Energy diffusion