Viscous Dissipation Effect on Natural Convection Flow along a Vertical Wavy Surface

Parveen, Nazma; Nath, Sujon; Alim, Md. Abdul

doi:10.1016/j.proeng.2014.11.852

Cited by 11 publications

(6 citation statements)

References 5 publications

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“…[7,65,76]. The results of Parveen et al [54] and Alao et al [6] corroborate with the analysis presented in this report as Table 4.1. Parveen et al [54] and Alao et al [6] remarked that R ex decreases with the effect of viscous dissipation.…”

Section: Responsesupporting

confidence: 88%

Numerical solutions of the partial differential equations for investigating the significance of partial slip due to lateral velocity and viscous dissipation: The case of blood‐gold Carreau nanofluid and dusty fluid

Kọrikọ

Adegbie

Shah

et al. 2021

Numerical Methods Partial

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The dynamics of blood conveying gold nanoparticles (GNPs) are helpful to the health workers while air conveying dust particles over rockets is helpful to space scientists during the testing phase. However, little is known on the significance of thermal diffusivity in these aforementioned cases. In this report, the partial differential equation suitable to unravel the implication of increasing partial slip and viscous dissipation on the dynamics of the mixture of (i) blood and nano size of GNPs (ii) air and dust particles on an object with an increasing diameter (uhspr) is investigated. The density, zero shear rate viscosity, heat capacity, and thermal conductivity treated in this study vary with volume fraction nanoparticles. In the second case, the interaction between the solid particles and air is incorporated into the momentum equation using the Stokes drag. Transformation and parametrization of the two‐dimensional nonlinear partial differential equations were obtained with the aid of suitable similarity variables. Thereafter, the numerical solutions of the corresponding boundary valued problems were obtained using the classical Runge–Kutta integration scheme together with shooting techniques and Matlab bvp5c package. Enhancement in the rate of viscous dissipation is a major factor suitable to increase the velocities of both fluids, boost temperature distribution across both fluids, and local skin friction coefficients. There exist a significant difference between the effect of partial slip on the dynamics of blood‐gold nanofluid and dusty fluid.

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Section: Responsesupporting

confidence: 88%

Numerical solutions of the partial differential equations for investigating the significance of partial slip due to lateral velocity and viscous dissipation: The case of blood‐gold Carreau nanofluid and dusty fluid

Kọrikọ

Adegbie

Shah

et al. 2021

Numerical Methods Partial

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“…, where Ns is the number of series connected cells, I pv,n represent the light generated current of the PV cell current, I 0 and V T are the reverse saturation current and the thermal voltage of the diode, V and I are the output voltage and current, respectively, R P and R S are the parallel and series panel resistances, and n is the diode constant. I pv can be calculated using Equation (12) and it depends basically on, the current at nominal condition I pv,n , solar irradiation (G), nominal irradiation (G n ), the current/temperature coefficient (K I ), and the temperature difference (ΔT) which represent the difference between the PV panel lower surface temperature and the ambient air temperature. it should be noted that increasing the temperature difference leads to an increase in the light generated value which means higher current and lowers PV voltage and therefore lower power output.…”

Section: T K T Q Bmentioning

confidence: 99%

“…The result obtained from the study is that the compressible gas enhanced the heat transfer rate near the wavy surface. Parveen et al 12 studied the natural convection flow of viscous fluid including viscous dissipation, the governing boundary layer equations are transformed into dimensionless nonsimilar equations by using a set of suitable variables and solved by a finite difference method The results of shear stress and Nusselt numbers are shown. It is found that the viscous dissipation, as well as wavy surface effects, reduced heat transfer rates.…”

Section: Introductionmentioning

confidence: 99%

A turbulent air‐flow corrugating photovoltaic model to enhance power output

2022

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This paper investigated the influence of the cooling of turbulent blowing air on the photovoltaic (PV) modules using the corrugation technique. The well‐known five‐parameter diode equation side by side with conservation principles were used to study the effect of corrugating lower PV sides to cool PV's and enhance efficiency. As the main restriction of PV systems is low efficiency that is powerfully counting on its operational temperature, therefore, reducing the operating temperature of PV cells is critical for the PV panel to work. To achieve this aim, a mathematical model describing PV temperatures and efficiency using continuity, momentum, and energy side by side with the Shockley diode equation was built. It was found that the corrugating of lower sides of PV's up to 1 mm in a distance of 20 mm considering turbulent flow conditions considerably reduced temperature and consequently enhanced thermal efficiency from 13% to 15%; the eddy viscosity and Reynolds shear stress increased boundary layer thickness and velocities, so increased the coefficient of heat transfer and consequently electrical power output and thermal efficiency.

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“…They analyzed that the wavy amplitude decreases with increasing value of radiation parameter. Parveen et al [20] investigated the influence of viscous dissipation in free convection flow over a wavy surface and showed that the thickness of boundary layer becomes prominent with respect to viscous dissipation parameter.…”

Section: Introductionmentioning

confidence: 99%

Impact of surface texture on entropy generation in nanofluid

et al. 2021

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We consider a heat transfer augmentation problem to minimize the entropy generation by assuming boundary layer flow of nanofluid over a moving wavy surface. The nanofluid demonstrates great potential in enhancing the heat transfer process due to its high thermal conductivity. The famous Tiwari and Das model has been used in the present article. Two types of water based nanofluids containing Cu and Fe3O4 nanoparticles are considered. Moreover, the surface texture is taken to be sinusoidal wavy to improve the thermal contact. The governing equations are transformed into a system of nonsimilar partial differential equations by using suitable dimensionless variables and solved by the Keller-Box method. The effects of involved parameters like amplitude wavelength ratio, group parameters, and volume fraction on the total entropy number and the Bejan number are analyzed graphically. It is showed Fe3O4 base nanofluid is more effective to lessen the entropy production as compared to Cu base nanofluid.

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Viscous Dissipation Effect on Natural Convection Flow along a Vertical Wavy Surface

Cited by 11 publications

References 5 publications

Numerical solutions of the partial differential equations for investigating the significance of partial slip due to lateral velocity and viscous dissipation: The case of blood‐gold Carreau nanofluid and dusty fluid

Numerical solutions of the partial differential equations for investigating the significance of partial slip due to lateral velocity and viscous dissipation: The case of blood‐gold Carreau nanofluid and dusty fluid

A turbulent air‐flow corrugating photovoltaic model to enhance power output

Impact of surface texture on entropy generation in nanofluid

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