Active method for nanofluid heat transfer enhancement by means of EHD. (June 2017)

• Record Type: Journal Article
• Authors: Sheikholeslami, M.; Bhatti, M.M.
• Is Part Of: International journal of heat and mass transfer. Volume 109(2017)
• Page Start: 115
• Page End: 122
• Publication Date: 2017-06
• Subjects: EHD -- Nanofluid -- Forced convection -- EFD viscosity -- CVFEM -- Joule heating; Heat -- Transmission -- Periodicals; Mass transfer -- Periodicals; Chaleur -- Transmission -- Périodiques; Transfert de masse -- Périodiques; Electronic journals; 621.4022
• DOI: 10.1016/j.ijheatmasstransfer.2017.01.115
• Languages: English
• ISSNs: 0017-9310

Abstract

Highlights: Impact of Coulomb force on nanofluid forced convection is analyzed. CVFEM is used to obtain the results. The bottom wall is moving lid and consider as positive electrode. Electric field dependent viscosity is considered for nanofluid. Abstract: In this article, impact of Coulomb force on nanofluid forced convective heat transfer is examined using Fe3 O4 -Ethylene glycol nanofluid. The bottom lid wall is considered as positive electrode. Control Volume based Finite Element Method is selected to obtain the outputs which are the roles of volume fraction of Fe3 O4 ( ϕ ), Reynolds number ( Re ) and supplied voltage ( Δ φ ) . Nanofluid viscosity is considered as function of electric field according to previous experimental data. Results indicate that Coulomb force helps the convention mode so temperature gradient enhance by augment of supplied voltage. Temperature gradient over the positive electrode augments with augment of Re and Δ φ . Applying Coulomb force is more useful for low values of Reynolds number. Enhancing in Nusselt number due to existence of electric field is highest at low lid velocity.