Homotopy Analysis Method for the Convection Flow in two Rotating Disks Filled by a Nanofluid Containing Both Nanoparticles and Microorganisms.

The investigation is made for the three dimensional bioconvection flow in two rotating disks filled with a nanofluid that contains both nanoparticles and gyrotactic microorganisms. Establishing the cylindrical coordinate, we get the corresponding governing equations. Using the similarity transformations on the problem has generated nonlinear ODEs with boundary conditions and its analytic solution is obtained by HAM. Then the detailed analysis is made with the effect of expansion ratio on the velocity of the nanofluid. [ABSTRACT FROM AUTHOR]