Effect of using nanofluids on the performance of rotating heat pipe

Hassan, Hamdy; Harmand, Souad

doi:10.1016/j.apm.2014.12.023

Cited by 46 publications

(17 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Foremost, Choi [1] proved that the thermal conductivity of traditional fluids can be radically augmented by suspending the macro/nano sized particles of metal uniformly into the traditional fluids. This concept incited many researchers towards nanofluids, and numerous investigations were carried out to analyze the applications and thermo-physical properties of nanofluids [2][3][4][5][6][7][8][9][10][11][12]. Further, the experimental or theoretical analysis of magnetohydrodynamic (MHD) flow over the permeable and non-permeable stretching sheets has been vigorously done by several researchers owing to its enormous relevance in modern industry such as in heat storage systems, oil recovery techniques, production of emollient, fiber and wire coating, elastic polymer substance, chemical equipment processing, thermal insulations, manufacturing of uniform and long metal parts, etc.…”

Section: Introductionmentioning

confidence: 99%

Thermal radiation impact on boundary layer dissipative flow of magneto-nanofluid over an exponentially stretching sheet

Hussain¹,

Sharma²,

Seth³

et al. 2018

IJHT

View full text Add to dashboard Cite

The impact of thermal radiation on viscous dissipative boundary layer flow of heat absorbing magneto-nanofluid over a permeable exponentially stretching sheet with Navier's velocity and thermal slips has been analyzed. The prevailing mathematical equations are changed to nonlinear ordinary differential equations using the appropriate similarity variables and then the equations are numerically solved by Runge-Kutta scheme of fourth order together with the shooting technique. Three kinds of water based nanofluids having aluminum oxide, copper and titanium oxide as nanoparticles are considered for this investigation. The consequence of relevant flow parameters on nanofluid velocity, temperature distribution, wall velocity gradient and local Nusselt number are displayed by means of various graphs. In addition, analysis of quadratic regression estimation on the numerical data of coefficient of skin friction and local Nusselt number has been presented to verify the relationship among the controlling physical parameters and transfer rate parameters. Our result reveals that the velocity and temperature distribution profiles are lower for Cu-water nanofluid followed by Al2O3 and TiO2 water base nanofluids in the regime of boundary layer. The thermal radiation and viscous dissipation have tendency to augment the Cu-water temperature over the stretching sheet.

show abstract

Section: Introductionmentioning

confidence: 99%

Thermal radiation impact on boundary layer dissipative flow of magneto-nanofluid over an exponentially stretching sheet

Hussain¹,

Sharma²,

Seth³

et al. 2018

IJHT

View full text Add to dashboard Cite

show abstract

“…For RHPs, steady-state modelling has been extensively addressed [23][24][25], with recent studies focusing on the use of nanofluids [26,27]. On the other hand, transient modelling studies are scarce.…”

Section: Introductionmentioning

confidence: 99%

Transient Modelling of Rotating and Stationary Cylindrical Heat Pipes: An Engineering Model

et al. 2018

View full text Add to dashboard Cite

Rotating wickless and stationary capillary cylindrical heat pipes are widely used heat transfer devices. Transient behavior of such heat pipes has been investigated numerically with computational fluid dynamics and lumped parameter models. In this paper, the advantages of both methods are combined into a novel engineering model that is low in computational cost but still accurate and rich in the details it provides. The model describes the interior dynamics of the heat pipe with a 2D representation of a cylindrical heat pipe. Liquid and vapor volumes are coarsely meshed in the axial direction. The cells are allowed to change in size in the radial direction during simulation. This allows for tracking the liquid/vapor interface without having to implement fine meshing. The model includes the equations for mass, momentum and energy and is applicable to both rotating and stationary heat pipes. The predictions of the model are validated with other experimental, numerical, and analytical works having an average deviation of less than 4%. The effects of various parameters on the system are explored. The presented model is suitable for the simulation of heat pipe systems in which both the level of detail and the computational cost are crucial factors.

show abstract

“…For example, Daniels and Al-Jumaily [18] and Uddina et al [19] ignored the inertia term of the liquid phase and obtained its temperature distribution by the zero dimension model. Song et al [17], Bertossi et al [1], and Hassan and Harmand [2,20] considered the liquid phase as a one-dimensional flow; Li et al [21] treated it as a two-dimensional flow. However, to discuss the performance of the heat pipe clearly under different working conditions, the effect of the vapor phase should be taken into full consideration.…”

Section: Introductionmentioning

confidence: 99%

“…For the uniform and symmetric distribution of boundary condition (A.11), as shown in (20), expression (A.17) can be written as…”

mentioning

confidence: 99%

Preliminary Estimate of Coriolis Force of Vapor Flow in Rotating Heat Pipes Based on Analytical Solution

Wang

2018

International Journal of Photoenergy

View full text Add to dashboard Cite

In current theory models for rotating heat pipes, the temperature field of the vapor phase is often supposed to be homogenous, and as a result of such simplification, the experiment result of the heat transfer performance for high rotating speed has some discrepancy with that predicted by theory models. In this paper, the analytical solution of the vapor flow in rotating heat pipes was obtained on the hypothesis of potential flow and with the method of variable separation. A specific rotating heat pipe was examined under three kinds of boundary conditions: linear distribution, uniform but asymmetric distribution, and uniform as well as symmetric distribution of heat load. The flow field was calculated, the Coriolis force is estimated, and it is found that (1) for a rotating heat pipe with high speed or large heat load, it is necessary to consider the Coriolis force, as its magnitude can be that of the gravitational acceleration; (2) the maximum Coriolis force is located at the vapor-liquid interface at the evaporator and condenser sections, and the directions in these two sections are opposite; (3) the Coriolis force is closely related with working conditions and working fluids, and it decreased with working temperature and increased with the heat load; and (4) the maximum viscous shear stress is located at the adiabatic section.

show abstract

Effect of using nanofluids on the performance of rotating heat pipe

Cited by 46 publications

References 28 publications

Thermal radiation impact on boundary layer dissipative flow of magneto-nanofluid over an exponentially stretching sheet

Thermal radiation impact on boundary layer dissipative flow of magneto-nanofluid over an exponentially stretching sheet

Transient Modelling of Rotating and Stationary Cylindrical Heat Pipes: An Engineering Model

Preliminary Estimate of Coriolis Force of Vapor Flow in Rotating Heat Pipes Based on Analytical Solution

Contact Info

Product

Resources

About