Unsteady gyrotactic microorganisms and magnetic nanofluid heat and mass transfer analysis inside a chamber with thermal radiation

ABSTRACT

In this examination, we predetermined to investigate the consequence of prescribed gyrotactic microorganism, thermal radiation on unsteady mixed convention flow of Buogiorno model nanofluid inside the square cavity. The combination of suitable momentum, temperature, concentration and concentration of microorganism of nanofluid has been solved numerically via Finite Element method. Pictorial illustrations have been used to predict the sway of sophisticated parameters on fluid flow, temperature, concentration and gyrotactic microorganism set up: Radiation $\left(0.1\le \text{R}\le 0.9\right)$, Brownian motion $\left(0.1\le \text{Nb}\le 0.9\right)$, Rayleigh number $\left(100\le \text{Ra}\le 300\right)$, Thermophoresis $\left(0.1\le \text{Nt}\le 0.9\right)$, Buoyancy ratio $\left(0.1\le \text{Nr}\le 0.5\right)$, Lewis number $\left(1\le \text{Le}\le 10\right)$, Peclet number $\left(1\le \text{Pe}\le 5\right)$ and Bio-convection Rayleigh number $\left(0.1\le \text{Rb}\le 0.9\right)$. Convergence analysis is presented via grid independence approach. The skin-friction coefficient, average Nusselt number, nanoparticle Sherwood number and microorganism Sherwood number of involved parameters are also plotted through graphs. It is observed through present investigation that isotherm patterns decline with higher choices of radiation parameter. Furthermore, the numerical codes of microorganism mass transport rate impede inside the cavity region with an intensifying values of thermophoresis parameter.

KEYWORDS:

• Buongiorno’s model nanofluid
• radiation
• finite element method
• Brownian motion
• gyrotactic microorganisms
• thermophoresis

Disclosure statement

No potential conflict of interest was reported by the author(s).