The effect of rotational constraint on thermo-bioconvection in suspensions of gravitactic microorganisms-a numerical study

This paper studies the cumulative effect of uniform rotation of the system and the heating/cooling from below on the stability of a suspension of motile gravitactic microorganisms in a shallow sparsely packed horizontal porous layer. The bioconvective system is described by the continuity, momentum, cell conservation, flux of micro-organisms and thermal energy equations. The basic state solution is determined and the perturbed equations are solved using a fast computational technique with the MATLAB tool. The Eigen value problem is solved and the profiles of the stream function, cell concentration, temperature along with the neutral stability curves are presented through graphs. The present results show an excellent agreement with the available results in the limiting cases.