Dynamics of bioconvective Casson nanoliquid from a moving surface capturing gyrotactic microorganisms, magnetohydrodynamics and stratifications

• Published in: Thermal science and engineering progress 2022-12, Vol.36, p.101492, Article 101492
• Main Authors: Waqas, M., Khan, W.A., Pasha, Amjad Ali, Islam, Nazrul, Rahman, Mustafa Mutiur
• Format: Article
• Language: English
• Subjects: Bioconvective Casson nanoliquid; Buongiorno’s model; Gyrotactic microorganisms; Magnetohydrodynamics; Thermo-solutal stratifications
• ISSN: 2451-9049; 2451-9049
• DOI: 10.1016/j.tsep.2022.101492

•Bioconvective flow of Casson nanoliquid towards vertical surface is modeled.•Stratification phenomena is considered.•Thermal radiation aspect is accounted for modeling energy expression.•Nonlinear convective flow is scrutinized. Nanotechnology has attracted researchers consideration all over the globe due to its utilizations in domains of food (bottles, cartons), fuels (ethanol, crude oil), medicine (clinical trial, drug delivery), batteries (lithium-ion battery, silver-zinc battery), electronics (switches, electronic circuits, silicon nanophotonic), fuel cells (nanoplate), chemical sensors, solar cells (nanowires, graphene) etc. Keeping such utilizations of nanotechnology in mind, the aim here is to scrutinize the Casson nanoliquid incompressible flow confined by vertically moving convected surface. Bioconvection aspect yielding macroscopic liquid movement under gradient of density allied with microorganisms swimming which strengthen base liquid density in a particular direction engenders the bioconvective flow is considered. Buongiorno’s model describing the diffusions (thermophoretic, Brownian) impact is utilized for modeling and analysis. Other salient aspects considered for energy and nanoparticles concentration are thermal radiation, Joule heating, thermal Robin conditions, viscous dissipation and thermo-solutal stratifications respectively. Suitable variables are employed to achieve ODEs from PDEs. Series solutions are reported utilizing homotopy analysis procedure. The parametric analysis of dimensionless variables against important quantities is elucidated comprehensively. The present analysis finds application in magnetized nanomaterials coating deposition at relatively higher temperatures.