Thermo-Magneto-Solutal Squeezing Flow of Nanofluid between Two Parallel Disks Embedded in a Porous Medium: Effects of Nanoparticle Geometry, Slip and Temperature Jump Conditions

Sobamowo, M. G.; Akinshilo, Akinbowale T.; Yinusa, A. A.

doi:10.1155/2018/7364634

Cited by 18 publications

(9 citation statements)

References 73 publications

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“…Hence, it becomes more complicated and cannot be integrated into cycle models. In general, low-order mathematical models are preferred for thermal systems [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39]. However, in the case of scroll expanders for small-scale power generation, empirical and semi-empirical models are preferred for performing cycle analysis.…”

Section: Introductionmentioning

confidence: 99%

Parametric investigation of open-drive scroll expander for micro organic rankine cycle applications

Upadhyaya

Gumtapure

2021

Journal of Thermal Engineering

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Organic Rankine cycles (ORC) are used to produce power from low-temperature heat sources. In the low power output range (<10 kW e ), scroll expanders are preferred. However, the performance of the ORC system is dependent on the expander efficiency. The present work focuses on the parametric investigation of the open-drive scroll expander used for micro-organic Rankine cycle. A 5 kW e expander was used and its built-in volume ratio was 3.5. R245fa was used as the working fluid. The analysis was carried out using a well-known semi-empirical model available in the literature. Effect of key parameters such as expansion ratio, shaft speed, and expander inlet temperature on power output and expander efficiency wasevaluated for four different cases. Results showed that, at an inlet pressure of 10 bar, peak efficiency of 58% and 60% was achieved at shaft speeds of 1500 RPM and 2000 RPM respectively. It was also evident that,at higher shaft speeds, the increase in mass flow rate is not sufficient to counter frictional and mechanical losses within the expander. The analysis also indicated that increasing the expander inlet temperature could have a negative impact on the expander efficiency as well as the overall performance of the ORC system, as the thermal energy dissipation is higher at higher inlet temperatures for all cases.

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Section: Introductionmentioning

confidence: 99%

Parametric investigation of open-drive scroll expander for micro organic rankine cycle applications

Upadhyaya

Gumtapure

2021

Journal of Thermal Engineering

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“…Past research works have presented magnetohydrodynamic fluid flow considering porous medium, nanofluid and some other factors capable of reshaping the squeezing process from idealization into reality [19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60]. Flow analyses of third grade fluids such as slurry flows, dilute polymer solution (polyisobutane, methylmethacrystalate in n-buthyl acetate), molten plastics, food rheology polymers mixed with melts, manufacturing oils and polymer melts like high viscosity silicon oils, blood, etc.…”

Section: Introductionmentioning

confidence: 99%

Impacts of magnetic field and thermal radiation on squeezing flow and heat transfer of third grade nanofluid between two disks embedded in a porous medium

Sobamowo

Yinusa

Aladenusi

2020

Heliyon

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In this present study, the impacts of magnetic field and thermal radiation on squeezing flow and heat transfer of third grade nanofluid between two disks embedded in a porous medium with temperature jump boundary conditions is analyzed using differential transformation method. The results of the approximate analytical solutions are verified using a fifth-order Runge-Kutta Fehlberg method (Cash-Karp Runge-Kutta) coupled with shooting method. From the analysis, the results of the two methods show excellent agreements. Also, the parametric studies using the approximate analytical solutions show that for a suction parameter greater than zero, the radial velocity of the lower disc increases while that of the upper disc decreases as a result of a corresponding increase in the viscosity of the fluid from the lower squeezing disc to the upper disc. For an increasing magnetic field parameter, the radial velocity of the lower disc decreases while that of the upper disc increases. As the third grade fluid parameter increases, there is a reduction in the fluid viscosity thereby increasing resistance between the fluid molecules. Also, it is found that as the radiation parameter increases, rate of heat transfer to the third grade fluid increases. There is a recorded decrease in the fluid temperature profile as the Prandtl number increases due to decrease in the thermal diffusivity of the third grade fluid. The agreement of the results of the present study and the experimental work shows the validation of the models used in this work to study the flow behaviour of the fluid. It is envisaged that the present work will increase the understanding of the flow behaviour of third grade nanofluid and heat transfer processes as evident in coal slurries, polymer solutions, textiles, ceramics, catalytic reactors, oil recovery applications etc.

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“…However, their analysis shows that, amplifying magnetic number tends to enhance the skin‐friction coefficient. Sobamowo et al 19 discussed the asymmetrical flow of a magnetized nanofluid between two parallel porous disks via homotopy perturbation scheme. Furthermore, the increasing Lewis number amplifies the concentration profile.…”

Section: Introductionmentioning

confidence: 99%

A generalized perspective of magnetized radiative squeezed flow of viscous fluid between two parallel disks with suction and blowing

Basha

2020

Heat Trans

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In this research article, the electrically conducting magnetized radiative squeezed flow of two-dimensional time-dependent viscous incompressible flow between two parallel disks with heat source/sink and Joule heating effects under the presence of an unsteady homogeneous first order chemical reaction is demonstrated numerically. The considered physical problem is studied under the influence of Lorentz forces to describe the effect of an applied magnetic field. Heat dissipation due to viscosity and Joule heating are considered in the energy equation to demonstrate the behavior of the thermal profile. Also, the thermodynamic behavior of temperature field is described by considering the concept of heat source/sink in the energy equation. The mass transport characteristics of a viscous fluid are described through the time-dependent chemical reaction of first order type with homogenous behavior. Thus, the considered physical problem gives the time-dependent, highly nonlinear coupled partial differential equations, which are reduced to a system of ordinary differential equations by invoking the suitable similarity transformations. The discretized first order ordinary differential equations are solved by using the Runge-Kutta fourth order integration scheme with the

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Thermo-Magneto-Solutal Squeezing Flow of Nanofluid between Two Parallel Disks Embedded in a Porous Medium: Effects of Nanoparticle Geometry, Slip and Temperature Jump Conditions

Cited by 18 publications

References 73 publications

Parametric investigation of open-drive scroll expander for micro organic rankine cycle applications

Parametric investigation of open-drive scroll expander for micro organic rankine cycle applications

Impacts of magnetic field and thermal radiation on squeezing flow and heat transfer of third grade nanofluid between two disks embedded in a porous medium

A generalized perspective of magnetized radiative squeezed flow of viscous fluid between two parallel disks with suction and blowing

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