Investigating the mixed convection heat transfer of a nanofluid in a square chamber with a rotating blade

Sepyani, Mehran; Shateri, Alireza; Bayareh, Morteza

doi:10.1007/s10973-018-7098-x

Cited by 29 publications

(11 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They studied the influence of Reynolds number, volume fraction of nanoparticles and expansion angle on heat transfer and fluid friction. Evaluation of the effect of nanofluid on convective heat transfer has been considered for different geometries [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Nanofluid flow in a microchannel with inclined cross-flow injection

2019

Self Cite

View full text Add to dashboard Cite

This paper investigates forced convection of water/Al 2 O 3 nanofluid flow in a microchannel with inclined cross-flow injection on the lower wall. There are a number of injecting holes on its lower wall. Other walls are insulated. The effect of different parameters including injection angle and number of injections on slip flow and heat transfer is investigated. It is concluded that increasing the injection angle up to 94° lead to an enhancement of the slip velocity and the Nusselt number on the microchannel walls. The results demonstrate that maximum heat transfer corresponds to the injection angle of 94°. It is revealed that the variation of Nusselt number decreases with the number of injection. As the volume fraction of nanoparticles increases, the heat transfer rate increases.

show abstract

Section: Introductionmentioning

confidence: 99%

Nanofluid flow in a microchannel with inclined cross-flow injection

2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…At a constant Reynolds number, the presence of the wing in the channel increases the mixing of hot and cold flows as the angle of rotation increases. In addition, the references [26][27][28][29][30] are introduced for different geometries and flow characteristics.…”

Section: Discussionmentioning

confidence: 99%

Numerical simulation of heat transfer over a flat plate with a triangular vortex generator

Bayareh¹,

Nourbakhsh²,

Khadivar³

2018

IJHT

Self Cite

View full text Add to dashboard Cite

In the present work, the effect of the angle of a triangular vortex generator on the heat transfer of a flat plate is investigated. Incompressible three-dimensional fluid flows in a channel with constant temperature boundary condition. The results showed that the Nusselt number increases and the pressure decreases with the Reynolds number. It is demonstrated that the increase in the angle from 30° to 90° has a significant effect on the Nusselt number. The pressure drop remains constant at a 60° angle with increasing Reynolds number. The results revealed that the longitudinal vortices that have an important effect on the heat transfer become stronger at larger angles of the vortex generator.

show abstract

“…A similar investigation of mixed convection inside a square cavity having a rotating flat plate was carried out by Lee et al 33 and it was shown that thermal oscillation occurred after Rayleigh number exceeded a threshold value. Sepyani et al 34 employed finite difference method to understand the flow and thermal field characteristics inside water‐

{Al}_{2} O_{3}

nanofluid‐filled differentially heated square chamber with an inner rotating blade. They considered the impacts of nanoparticle concentration, length of the rotating blade, Richardson number, and Rayleigh number.…”

Section: Introductionmentioning

confidence: 99%

Mixed convective heat transfer enhancement in a ventilated cavity by flow modulation via rotating plate

et al. 2020

View full text Add to dashboard Cite

The present study numerically explores the mixed convection phenomena in a differentially heated ventilated square cavity with active flow modulation via a rotating plate. Forced convection flow in the cavity is attained by maintaining external fluid flow through an opening at the bottom of the left cavity wall while leaving it through another opening at the right cavity wall. A counter‐clockwise rotating plate at the center of the cavity acts as an active flow modulator. Moving mesh approach is used for the rotation of the plate and the numerical solution is achieved using arbitrary Lagrangian‐Eulerian finite element formulation with a quadrilateral discretization scheme. Transient parametric simulations have been performed for various frequency of the rotating plate for a fixed Reynolds number (Re) of 100 based on maximum inlet flow velocity while the Richardson number (Ri) is maintained at unity. Heat transfer performance has been evaluated in terms of spatially averaged Nusselt number and time‐averaged Nusselt number along the heated wall. Power spectrum analysis in the frequency domain obtained from the fast Fourier transform analysis indicates that thermal frequency and plate frequency start to deviate from each other at higher values of velocity ratio (>4).

show abstract

Investigating the mixed convection heat transfer of a nanofluid in a square chamber with a rotating blade

Cited by 29 publications

References 36 publications

Nanofluid flow in a microchannel with inclined cross-flow injection

Nanofluid flow in a microchannel with inclined cross-flow injection

Numerical simulation of heat transfer over a flat plate with a triangular vortex generator

Mixed convective heat transfer enhancement in a ventilated cavity by flow modulation via rotating plate

Contact Info

Product

Resources

About