Numerical simulation of three-dimensional thermo-solutal convection of micropolar multi-walled carbon nanotubes water nanofluid stabilized by lignin and sodium polycarboxylate

A computational analysis has been performed in this study to solve three-dimensional thermo-solutal natural convection a differentially heated cubical enclosure filled with micropolar CNT/water nanofluid stabilized by two types of surfactants lignin and sodium polycarboxylate. The work is carried out for different pertinent parameters as Rayleigh number (104 $$\le$$ Ra 106), parameter (0 K 10), buoyancy ratio (−1 N 0) nanoparticles’s volume fraction (0.0055% $$\le \varphi \le$$ 0.557%). It observed that the heat mass transfer rates are lower model when compared pure model. In fact, enhancement results decrease average Nusselt Sherwood numbers. use surfactant ameliorates rate flow better than polycarboxylate surfactant. nanoparticles can be used control element fluid flow. Thus, concentration less critical value, intensity ameliorated deteriorated it exceeds value.