The effect of aspect ratios of rib on the heat transfer and laminar water/TiO 2 nanofluid flow in a two-dimensional rectangular microchannel

Gravndyan, Qumars; Akbari, Omid Ali; Toghraie, Davood; Marzban, Ali; Mashayekhi, Ramin; Karimi, Reza; Pourfattah, Farzad

doi:10.1016/j.molliq.2017.04.030

Cited by 161 publications

(53 citation statements)

References 60 publications

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“…Many researchers have investigated the influences of adding those particles on applications such as drug targeting, heat exchangers, power plants and etc. Gravndyan et al [7] have investigated the effects of ribs mounted on channel surface utilizing Ti2O/water nanofluid. They reported in all values of Reynolds number and ribs aspects ratios, increasing volume fraction of nanoparticle raise the average Nusselt number.…”

Section: Introductionmentioning

confidence: 99%

Magnetohydrodynamic (MHD) Flow in a Channel Including a Rotating Cylinder

Mobadersani

Bahjat

2021

IJE

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Heat transfer analysis in channels and enclosures has significant attention nowadays. In the present work, fluid flow and heat transfer of a vertical channel consisting of a rotating cylinder utilizing nanofluid have been studied, numerically. Uniform magnetic field has been applied to the fluid field. Different cylinder rotation directions, Hartmann number and rotational velocity of cylinder configurations have been considered. T he results indicate that by increasing the Hartmann num ber, for low values of nondimensional angular velocity the average Nusselt number increases. In addition, in higher Hartmann numbers, the average Nusselt number does not change remarkably with non-dimensional angular velocity. Furthermore, studying lift and drag coefficients demonstrate that in a constant Hartmann number, the highest drag coefficient takes place in maximum cylinder angular velocity. Additionally, almost uniform distribution of drag coefficient can be seen in higher Hartmann numbers. The numerical results have been compared with the previously reported results. This comparison illustrates excellent agreement between them.

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Section: Introductionmentioning

confidence: 99%

Magnetohydrodynamic (MHD) Flow in a Channel Including a Rotating Cylinder

Mobadersani

Bahjat

2021

IJE

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“…Moshizi 32 has considered the influence of magnetic field on nanoliquid flow driven by a channel. The importance of adding nanoparticles to enhance the thermal performance of a microchannel was recognized by Gravndyan et al 33 Flow analysis for different cross‐sectional areas of microchannel was done by Toghraie et al 34 Seyyedi et al 35 deliberated the flow through an L‐shaped enclosure. They remarked that heat transfer enhances for uplifting values of nanoparticle solid volume fraction.…”

Section: Introductionmentioning

confidence: 99%

Analysis of second law on Eyring‐Powell nanoliquid flow in a vertical microchannel considering magnetic field and convective boundary

Sindhu

Gireesha

2020

Heat Trans

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Studies related to enhancing heat transfer has attained much attention of researchers to avail optimized heat-transfer devices. High viscous fluids are of great importance as they are widely used in petroleum products, organic chemistry, coating, printing, and so forth. In this study, heat transfer mechanism driven by Eyring-Powell nanoliquid flow in a vertical microchannel is examined. Impact of considering buoyancy force, magnetic field, and convective boundary on the thermal system is demonstrated. The modeled nondimensional equations are computed by using the Runge-Kutta-Fehlberg method. The vital roles of thermophoresis and Brownian motion are discussed in detail. The significance of second law analysis for thermal systems is presented. The causes of irreversibilities in a microchannel due to Eyring-Powell nanoliquid flow is also demonstrated in the current research study. The upshots of the current investigations are visualized through graphical elucidation. It is established that minimization of entropy generation can be achieved by enhancing the mechanism of thermophoresis. The convective boundary helps in transmitting heat from the thermal system to the ambience hence the lower thermal field is attained.

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“…The laminar flow of the nanoliquid in various thermal systems has been studied by several authors, considering the significance of adding nanoparticles into the the conventional fluid. The prominence of adding nanoparticles to enhance the thermal performance of a microchannel was recognized by Gravndyan et al 11 The flow and thermal analysis SINDHU AND GIREESHA | 877 of incompressible fluid in different cross-sectional areas of the microchannel was performed by Toghraie et al 12 and Seyyedi et al 13 for an L-shaped enclosure. They showed that the average heat transfer enhances with increasing values of nanoparticle solid volume fraction.…”

Section: Introductionmentioning

confidence: 99%