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Mehrdad Sheikholeslami - One of the best experts on this subject based on the ideXlab platform.
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numerical simulation for impact of Coulomb Force on nanofluid heat transfer in a porous enclosure in presence of thermal radiation
International Journal of Heat and Mass Transfer, 2018Co-Authors: Mehrdad Sheikholeslami, Houman B RokniAbstract:Abstract 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 ( Δ φ ) . 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.
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active method for nanofluid heat transfer enhancement by means of ehd
International Journal of Heat and Mass Transfer, 2017Co-Authors: Mehrdad Sheikholeslami, M M BhattiAbstract:Abstract In this article, impact of Coulomb Force on nanofluid Forced convective heat transfer is examined using Fe3O4-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 Fe3O4 ( 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.
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influence of efd viscosity on nanofluid Forced convection in a cavity with sinusoidal wall
Journal of Molecular Liquids, 2017Co-Authors: Mehrdad Sheikholeslami, Houman B RokniAbstract:Abstract Impact of Coulomb Force on Fe3O4-Ethylene glycol nanofluid convective heat transfer is examined. The positive electrode is considered as moving wall. Control Volume based Finite Element Method is selected to obtain the outputs which are the roles of Reynolds number (Re), nanofluid volume fraction and supplied voltage (Δφ). EFD viscosity of nanofluid according to experimental data is taken into account. Results reveal that electric field boosts the convention mode so heat transfer rate augments by augmenting Coulomb Force. Isotherms become denser near the lid wall with augment of Re and Δφ. Using electric field is more useful for lower Reynolds number.
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impact of electric field on nanofluid Forced convection heat transfer with considering variable properties
Journal of Molecular Liquids, 2017Co-Authors: Mehrdad Sheikholeslami, D D GanjiAbstract:Abstract Nanofluid Forced convection heat transfer is simulated in presence of electric field. The bottom wall is lid driven and considered as positive electrode. The working fluid is Fe3O4-ethylene glycol nanofluid. Control volume based finite element method is selected to obtain the results which are the roles of volume fraction of Fe3O4 (ϕ), Reynolds number (Re) and supplied voltage (Δφ). Electric field dependent (EFD) viscosity of nanofluid according to previous experimental data is taken into account. Results indicate that Coulomb Force helps the convective mode so temperature gradient enhances by enhancing Coulomb Force. Enhancing in temperature gradient due to existence of electric field is highest at low Reynolds number.
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electrohydrodynamic free convection heat transfer of a nanofluid in a semi annulus enclosure with a sinusoidal wall
Numerical Heat Transfer Part A-applications, 2016Co-Authors: Mehrdad SheikholeslamiAbstract:ABSTRACTNatural convection heat transfer of a nanofluid in the presence of an electric field is investigated. The control volume finite element method (CVFEM) is utilized to simulate this problem. A Fe3O4–ethylene glycol nanofluid is used as the working fluid. The effect of the electric field on nanofluid viscosity is taken into account. Numerical investigation is conducted for several values of Rayleigh number, nanoparticle volume fraction, and the voltage supplied. The numerical results show that the voltage used can change the flow shape. The Coulomb Force causes the isotherms to become denser near the bottom wall. Heat transfer rises with increase in the voltage supplied and Rayleigh number. The effect of electric field on heat transfer is more pronounced at low Rayleigh numbers due to the predomination of the conduction mechanism.
D D Ganji - One of the best experts on this subject based on the ideXlab platform.
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influence of electric field on fe3o4 water nanofluid radiative and convective heat transfer in a permeable enclosure
Journal of Molecular Liquids, 2018Co-Authors: D D GanjiAbstract:Abstract In this article, Fe3O4- water nanofluid EHD Forced convection is investigated. Different shapes of nanoparticles are considered. The porous enclosure has one moving wall which is considered as positive electrode. Control Volume based Finite Element Method is employed to simulate this problem. Outputs show the roles of Reynolds number (Re), Fe3O4- H2O nanofluid volume fraction (ϕ), Darcy number (Da), radiation parameter (Rd) and supplied voltage (Δφ). Results demonstrate that temperature gradient is an enhancing function of Coulomb Force and permeability. Maximum values for temperature gradient is obtained for platelet shape nanoparticles.
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impact of electric field on nanofluid Forced convection heat transfer with considering variable properties
Journal of Molecular Liquids, 2017Co-Authors: Mehrdad Sheikholeslami, D D GanjiAbstract:Abstract Nanofluid Forced convection heat transfer is simulated in presence of electric field. The bottom wall is lid driven and considered as positive electrode. The working fluid is Fe3O4-ethylene glycol nanofluid. Control volume based finite element method is selected to obtain the results which are the roles of volume fraction of Fe3O4 (ϕ), Reynolds number (Re) and supplied voltage (Δφ). Electric field dependent (EFD) viscosity of nanofluid according to previous experimental data is taken into account. Results indicate that Coulomb Force helps the convective mode so temperature gradient enhances by enhancing Coulomb Force. Enhancing in temperature gradient due to existence of electric field is highest at low Reynolds number.
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effect of electric field on hydrothermal behavior of nanofluid in a complex geometry
Journal of Molecular Liquids, 2016Co-Authors: Mehrdad Sheikholeslami, Soheil Soleimani, D D GanjiAbstract:Abstract Electric field effect on nanofluid Forced convective heat transfer in an enclosure with sinusoidal wall is presented. Control Volume based Finite Element Method (CVFEM) is utilized to simulate this problem. Fe 3 O 4 –ethylene glycol nanofluid is used as working fluid. Numerical investigations are conducted for several values of Reynolds number, nanoparticle volume fraction and supplied voltage. Results show that supplied voltage can change the flow shape. Coulomb Force causes isotherms to be denser near the moving wall. Heat transfer rises with augmentation of supplied voltage and Reynolds number. The effect of electric field on heat transfer is more pronounced at low Reynolds number.
Houman B Rokni - One of the best experts on this subject based on the ideXlab platform.
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numerical simulation for impact of Coulomb Force on nanofluid heat transfer in a porous enclosure in presence of thermal radiation
International Journal of Heat and Mass Transfer, 2018Co-Authors: Mehrdad Sheikholeslami, Houman B RokniAbstract:Abstract 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 ( Δ φ ) . 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.
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influence of efd viscosity on nanofluid Forced convection in a cavity with sinusoidal wall
Journal of Molecular Liquids, 2017Co-Authors: Mehrdad Sheikholeslami, Houman B RokniAbstract:Abstract Impact of Coulomb Force on Fe3O4-Ethylene glycol nanofluid convective heat transfer is examined. The positive electrode is considered as moving wall. Control Volume based Finite Element Method is selected to obtain the outputs which are the roles of Reynolds number (Re), nanofluid volume fraction and supplied voltage (Δφ). EFD viscosity of nanofluid according to experimental data is taken into account. Results reveal that electric field boosts the convention mode so heat transfer rate augments by augmenting Coulomb Force. Isotherms become denser near the lid wall with augment of Re and Δφ. Using electric field is more useful for lower Reynolds number.
S T Bramwell - One of the best experts on this subject based on the ideXlab platform.
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experimental signature of the attractive Coulomb Force between positive and negative magnetic monopoles in spin ice
Nature Physics, 2016Co-Authors: C Paulsen, Keisuke Matsuhira, Elsa Lhotel, S T Bramwell, Sean Giblin, D Prabhakaran, G BalakrishnanAbstract:A magnetic analogue of the Poole–Frenkel effect shows that magnetic monopole quasiparticles in a spin ice behave similar to electrons in a semiconductor, with an attractive Coulomb Force acting between positive and negative monopoles.
Liewen Chen - One of the best experts on this subject based on the ideXlab platform.
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double neutron proton differential transverse flow as a probe for the high density behavior of the nuclear symmetry energy
Physical Review C, 2006Co-Authors: Gaochan Yong, Liewen ChenAbstract:The double neutron-proton differential transverse flow taken from two reaction systems using different isotopes of the same element is studied at incident beam energies of 400 and 800 MeV/nucleon within the framework of an isospin- and momentum-dependent hadronic transport model IBUU04. The double differential flow is found to retain about the same sensitivity to the density dependence of the nuclear symmetry energy as the single differential flow in the more neutron-rich reaction. Because the double differential flow reduces significantly both the systematic errors and the influence of the Coulomb Force, it is thus more effective probe for the high-density behavior of the nuclear symmetry energy.
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double neutron proton ratio of nucleon emissions in isotopic reaction systems as a robust probe of nuclear symmetry energy
Physics Letters B, 2006Co-Authors: Liewen Chen, Gaochan Yong, Wei ZuoAbstract:The double neutron/proton ratio of nucleon emissions taken from two reaction systems using four isotopes of the same element, namely, the neutron/proton ratio in the neutron-rich system over that in the more symmetric system, has the advantage of reducing systematically the influence of the Coulomb Force and the normally poor efficiencies of detecting low energy neutrons. The double ratio thus suffers less systematic errors. Within the IBUU04 transport model the double neutron/proton ratio is shown to have about the same sensitivity to the density dependence of nuclear symmetry energy as the single neutron/proton ratio in the neutron-rich system involved. The double neutron/proton ratio is therefore more useful for further constraining the symmetry energy of neutron-rich matter.
