Abstract
The aim of this study is to investigate the effect of barrier temperature on hybrid nanofluid MHD mixed convection via LBM. The shape of the evaluated chamber is trapezoidal, subjected to heat absorption or heat generation. Reducing the share of heat transfer in entropy production up to about 14% is possible by changing the blocking temperature from 1 to zero. By increasing the effect of buoyancy forces, a stronger convection current is formed inside the chamber. When the magnetic field is applied, it reduces the fluid flow speed and temperature gradient. This factor leads to the reduction of convection effects and the weakening of buoyancy forces. So, the stronger the convection, the more obvious this effect. The flow under the influence of heat production results in the lowest mean Nusselt value. The higher heat absorption or heat generation coefficients, lead to a more effective magnetic field application. If the number of Richardson is low, heat absorption or heat generation effects are more obvious. Bejan Number, for the coefficient of heat absorption or heat generation, equals +5 (Q=+5), which is about 10% & 18% higher than Q=0 and Q=-5, respectively.