The results showed that, when the buoyancy is added, the flow separation diminishes gradually and at some value of the buoyancy parameter it completely disappears.
Below the critical Richardson number, the heat transfer rate increases slightly, however, it increases with a faster rate above the critical buoyancy parameter due to higher contact between the fluid flow and the wall of cylinder.
The thermal buoyancy delays the separation in different power-law indexes gradually and at some critical value of the buoyancy parameter it completely disappears resulting a stuck flow around a cylinder.
It can be seen that as the buoyancy parameter N increases, the temperature profiles decrease.
4), that as the buoyancy parameter N increases the concentration profiles decrease concentration profiles The heat transfer coefficient as a function of Lewis number Le for varying N , Mn without dispersion ( Pe Pe 0 ) and F0 Pe 0.
Figures 4 and 5 are depicted for positive values of the buoyancy parameter
Gr which corresponds to the cooling problem.
9] studied the above mention heat transfer over a stretching surface with variable heat flux in micropolar fluids in the absence of the magnetic field (H = 0), the temperature buoyancy parameter (G = 0), and the local heat generation parameter (Q = 0).
The solution of Eqs (9)-(12) is subjected to the boundary conditions (13) in the absence of all the magnetic field (H = 0), the temperature buoyancy parameter (G = 0) and the local heat generation parameter (Q = 0) can be found in Pop et al.
Results of velocity and temperature profiles investigated for laminar developing mixed convection in vertical channel with different buoyancy parameter Gr/Re are shown in figures 3 and 6.
Figures 7 to 9 show the development of temperature profile for fixed buoyancy parameter Gr/Re.
5] investigated theoretically the problem of free convection boundary layer flow of nanofluids over a non-linear stretching sheet, incorporating the effects of buoyancy parameter
, the solutal buoyancy parameter
and the power law velocity parameter.
1] is the buoyancy parameter
, M = [partial derivative][B.