Numerical simulation for impact of Coulomb force on nanofluid heat transfer in a porous enclosure in presence of thermal radiation

• Published in: International journal of heat and mass transfer Vol. 118; pp. 823 - 831
• Main Authors: Sheikholeslami, M., Rokni, Houman B.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01-03-2018; Elsevier BV
• Subjects: Computational fluid dynamics; Computer simulation; Concentration (composition); Convective heat transfer; Coulomb force; CVFEM; Darcy number; Electric fields; Electric potential; Ethylene glycol; Finite element method; Fluid flow; Heat transfer; Hydrothermal treatment; Iron oxides; Nanofluid; Nanofluids; Nanoparticles; Parameter estimation; Permeability; Porous media; Radiation; Radiation heat transfer; Reynolds number; Shape factor; Thermal radiation; Viscosity; Porous media; Shape factor; Coulomb force; CVFEM; Nanofluid; Radiation heat transfer
• ISSN: 0017-9310; 1879-2189
• DOI: 10.1016/j.ijheatmasstransfer.2017.11.041

•Fe3O4-Ethylene glycol nanofluid EHD flow is investigated.•Thermal radiation effect on nanofluid behavior is considered.•New numerical approach (CVFEM) is utilized.•Nusselt number is an augmenting function of Coulomb force.•Platelet shape nanoparticle has highest Nusselt number.
Influence of thermal radiation and external electric field on Fe3O4-Ethylene glycol nanofluid hydrothermal treatment is presented in this article. The lid driven cavity is porous media and the bottom wall is selected as positive electrode. Influence of supplied voltage on viscosity of nanofluid is taken into account. Control Volume based Finite Element Method is utilized to estimate the roles of radiation parameter (Rd), Darcy number (Da), Reynolds number (Re), nanofluid volume fraction (ϕ) and supplied voltage (Δφ). Results indicate that shape of nanoparticles can change the flow style and maximum rate of heat transfer is obtained by selecting platelet shape nanoparticles. The convective heat transfer improves with augment of permeability and Coulomb force.