چكيده لاتين :
Steady state boundary layer equations over a flat plate with a constant wall temperature can
be solved by an integral solution (with three profiles for velocity and temperature), a similarity
sol ution (exact) and a Blasi us series solution. The analysis of entropy generation for each solution
is carried out. The results show that the exact solution (similarity) is the one that minimizes the
rate of total entropy generation in the boundary layer. Then, the Blasius solution has the least
entropy generation of all. The bell-shaped profile (sinus profile) in the integral solution generates
less entropy than the piecewise linear profile, consequently. So, with this method, if the exact
solution for a specified problem were not available, one could evaluate the approximate solutions
and recognize the best one among them. By introducing a new non-dimensional number (Ej
number), which is the ratio of thermal entropy to friction entropy generation, one can recognize
which of them is dominant in the boundary layer. Also, it is observed that variation of the
total entropy generation is the same as the variation of boundary layer thickness, so, the nondimensional
total entropy generation for various solutions is constant.
