Experimental study of fluid flow in the entrance of a sinusoidal channel

Oviedo-Tolentino, F.; Romero‐Méndez, Ricardo; Hernández-Guerrero, Abel; Giron-Palomares, Benjamin

doi:10.1016/j.ijheatfluidflow.2008.03.017

Cited by 46 publications

(18 citation statements)

References 19 publications

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“…As shown in Figure 2 Figures 3 and 4 compare stream lines of the present work and experimentally generated photos that provided by Tolentino et al [3]. Although the present code is capable to capturing these fluctuations and the stream lines for early waves are matched quite well with the experiments.…”

Section: Resultssupporting

confidence: 67%

“…On the other hand for viscous fluids the adverse pressure gradient separates the flow from the surface and vortex is formed. In Figure 9 the stream functions is compared with the experimental work established by Tolentiono et al [3]. A good agreement is observed between them.…”

supporting

confidence: 64%

“…Their result demonstrated the enhancement in heat transfer by increasing aspect ratio and Reynolds number. Flow through in a channel with sinusoidal plates was experimentally investigated by Tolentino et al [3]. The experiments were operated in a water tunnel; and laser illuminated particle tracking was used as the technique of flow visualization.…”

Section: Introductionmentioning

confidence: 99%

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Flow and Heat Transfer Investigation of Forced Convection of Nanofluid in a Wavy Channel at Different Wavelengths and Phase Difference

Abokazempour¹,

Ramiar²,

Ranjbar³

et al. 2018

B Soc Paran Mat

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abstract:Graphical Abstract:Changing the fluid properties and flow geometry are two common ways of making an improvement in heat transfer rate. Recent investigations on nanofluid, as such suspensions are often called, indicate that the suspended nanoparticles remarkably change the transport properties and heat transfer characteristics of the suspension. Bending walls can also improve heat transfer by increasing the total heat transfer surface and changing the behavior of the flow. In this work a two dimensional incompressible laminar nanofluid flow in a wavy channel with sinusoidal curved walls is numerically investigated. The finite volume method, and Rhie and Chow interpolation with a collocated mesh are used for solving the governing equations. The effects of the volume fraction of nanoparticles, Reynolds number, the wavelength, Phase lag and amplitude on the heat transfer rate are studied. The present work showed good agreement with existing experimental and Numerical results. Increasing the amplitude of the wave and nanoparticles volume fraction, and decreasing wavelength of the wave, has great effects on enhancement of heat transfer rate.

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Section: Resultssupporting

confidence: 67%

supporting

confidence: 64%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Flow and Heat Transfer Investigation of Forced Convection of Nanofluid in a Wavy Channel at Different Wavelengths and Phase Difference

Abokazempour¹,

Ramiar²,

Ranjbar³

et al. 2018

B Soc Paran Mat

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“…The experimental study of Tolentino et al [28] for Re ¼ 470 and numerical results performed by, Yang et al [18] for Re ¼ 500, a ¼ 0.02 m and f ¼ 0% were used for this purpose. The present results are in good agreement with the above mentioned numerical and experimental data as plotted in Fig.…”

Section: Numerical Procedures and Validationsmentioning

confidence: 99%

Heat transfer optimization of two phase modeling of nanofluid in a sinusoidal wavy channel using Artificial Bee Colony technique

Valinataj-Bahnemiri

Ramiar

Manavi

et al. 2015

Engineering Science and Technology, an International Journal

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a b s t r a c tThe present study represents the heat transfer optimization of two-dimensional incompressible laminar flow of Al 2 O 3 -water nanofluids in a duct with uniform temperature corrugated walls. A two phase model is applied to investigate different governing parameters, namely: Reynolds number (100 Re 1000), nonofluids volume fraction (0% f 5%) and amplitude of the wavy wall (0 a 0.04 m). For optimization process, a recent spot-lighted method, called Artificial Bee Colony (ABC) algorithm, is applied, and the results are shown to be in a good accuracy in comparison with another well-known heuristic method, i.e. particle swarm optimization (PSO). The results indicate that the effect of utilizing nanoparticles and increasing Reynolds number is more intensified on growing the average Nusselt number than variations of the amplitude of the wavy wall. To prevent the worst possible heat transfer, the specific amplitude which leads to a minimum average Nusselt number is detected. The effect of using nanoparticles on thermal-hydraulic performance factor (j/f) is presented which considers both heat transfer and hydrodynamics aspects. The results showed that volume fraction has a direct and the wavy wall's amplitude has a converse effect on the thermal-hydraulic performance factor. Furthermore, an optimum value for Reynolds number is found to maximize the thermal-hydraulic performance factor.

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“…Hasegawa & Izuchi 1983;Nishimura et al 1989), due to their industrial applications, e.g. increasing heat transfer (Oviedo-Tolentino et al 2008), peristaltic pumping (Burns & Parkes 1967), etc. Displacements fluid flows in non-uniform channels have also recently received attention.…”

Section: Introductionmentioning

confidence: 99%

Buoyant displacement flows in slightly non-uniform channels

Mollaabbasi

Taghavi

2016

J. Fluid Mech.

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We consider displacement flows in slightly diverging or converging plane channels. The two fluids are miscible and buoyancy is significant. We assume that the channel is oriented close to horizontal. Employing a classical lubrication approximation, we simplify the governing equations to furnish a semi-analytical solution for the flux functions. Then, we demonstrate how the non-uniformity of the displacement flow geometry can affect the propagation of the interface between the heavy and light fluids in time, for various parameters studied, e.g. the viscosity ratio, a buoyancy number and rheological features. By setting the molecular diffusion effects to zero, certain solution behaviours at longer times can be practically predicted through the associated hyperbolic problem, using which it becomes possible to directly compute the interfacial features of interest, e.g. leading and trailing front heights and speeds. For a Newtonian displacement flow in a converging or uniform channel, as the buoyancy number increases from zero, we are able to classify three flow regimes based on the behaviour of the trailing front near the top of the channel: a no-back-flow regime, a stationary interface flow regime, and a sustained back-flow regime. For the case of a diverging channel flow, the sustained back-flow regime is replaced by an eventually stationary interface flow regime. In addition, as the displacement flow progresses, the leading front speed typically increases (decreases) in a converging (diverging) channel, while the opposite is usually true for the front height. For the no-back-flow regime (i.e. with small buoyancy), the solution of the displacement flow at long times in all the geometries considered converges to a similarity form, while no similarity form is found for the other flow regimes. As the displacement flow develops, frontal diffusive effects are reduced (enhanced) in a converging (diverging) channel and multiple fronts are progressively less (more) present in a converging (diverging) channel. Regarding non-Newtonian effects, a shear-thinning fluid displacing a Newtonian fluid exhibits an increasingly fast front that has a short height in a converging channel. When a yield stress is present in the displaced fluid, it is possible to find residual wall layers of displaced fluid that are completely static. These layers disappear at a certain critical downstream distance in a converging channel while they appear at a critical distance in a diverging channel. Finally, the combination of strong buoyant and yield-stress effects can modify the destiny of a second front that follows the leading front.

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Experimental study of fluid flow in the entrance of a sinusoidal channel

Cited by 46 publications

References 19 publications

Flow and Heat Transfer Investigation of Forced Convection of Nanofluid in a Wavy Channel at Different Wavelengths and Phase Difference

Flow and Heat Transfer Investigation of Forced Convection of Nanofluid in a Wavy Channel at Different Wavelengths and Phase Difference

Heat transfer optimization of two phase modeling of nanofluid in a sinusoidal wavy channel using Artificial Bee Colony technique

Buoyant displacement flows in slightly non-uniform channels

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