Effect of heat generation and chemical reaction on MHD mixed convective flow of power-law Buongiorno's nanofluid in a lid-driven cavity with solid square block.

The numerical study presents the effect of heat generation and chemical reaction on the problem of magnetohydrodynamics mixed convective flow of power-law nanofluid using Buongiorno's model. Adiabatic non-conducting solid square block is located at the center of the cavity and both vertical walls are moving with uniform velocity. The governing dimensional equations in vector form are transformed into non-dimensional form. Then, the dimensionless equations are solved numerically by finite element method (FEM) using automated solution technique which is FEniCS. The effects of different parameters such as Richardson number, power-law index, magnetic field, heat generation/absorption, chemical reaction and size of square block on velocity, temperature, and concentration profiles are performed and discussed in this paper. It is found that rising both Richardson number and power-law index lead to increase the velocity and temperature profiles (right side of cavity). Besides, rising both magnetic parameter and size of square block lead to decrease the velocity and temperature profiles (right side of cavity). Adding the heat generation/absorption parameter has increased the temperature profile. In addition, increasing chemical reaction parameter has reduced the concentration profile. [ABSTRACT FROM AUTHOR]