Laminar Nanofluid Flow Over Periodic Two Dimensional Rectangular Baffled Channels

Osia, A.; Mohammed, Hussein A.; Abdollahi, Ayoub; Ali, Jafar

doi:10.1166/jctn.2014.3458

Cited by 5 publications

(3 citation statements)

References 14 publications

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“…The effective specific heat capacity of nanofluid [56,58]: (11) The effective thermal conductivity [59,60]:…”

Section: Thermo-physical Properties Of Nanofluidsmentioning

confidence: 99%

Fluid flow and heat transfer of water based-nanofluids in plate- fin heat Sink

Rahbar,

Shotorbani,

Bazyar

et al. 2023

Preprint

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Heat transfer is generally needed in industrial processes and consumer products. To improve efficiency and to increase power density per unit surface and volume, new materials such as nanofluid have been developed for improving heat transfer systems. Nanofluid consisting of nanoparticles dispersed in a base fluid provides improved heat transfer capability. The use of passive strategies in microchannel heat sinks allows for increasing the device’s efficiency. In this study, the fluid flow and heat transfer characteristics of turbulent nanofluids flow in plate- fin heat sink (PFHS) such as base surface temperature, local Nusselt number, dimensionless pressure (Eu number), pumping power, profit factor, thermal resistance and effective Prandtl number are studied. Using the K-Ɛ turbulence model, the characteristics of the fluid flow through the PFHS are described and simulated by Ansys Fluent. A constant heat flux boundary condition is applied on the base plate of PFHS and all the other surfaces of PFHS are insulated. Four different kinds of nanofluids are utilized as working fluids which are SiO2, Al2O3, ZnO, and CuO dispersed in distilled water as a base fluid. Volume fractions of 2% and a distinctive nanoparticle diameter of 60 nm were employed. Results indicate that nanofluids can improve the performance of PFHS. Viscosity has an important role in the pressure drop in the PFHS. The improvement in the thermal transportation of nanofluids increases the convective heat transfer coefficient.

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“…The effective specific heat capacity of nanofluid [56,58]: (11) The effective thermal conductivity [59,60]:…”

Section: Thermo-physical Properties Of Nanofluidsmentioning

confidence: 99%

Fluid flow and heat transfer of water based-nanofluids in plate- fin heat Sink

Rahbar,

Shotorbani,

Bazyar

et al. 2023

Preprint

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“…Properties of metals and nano-particles. [31][32][33][34] Thermal properties temperature drops because there is more mass to provide heat. After validating the numerical method, a more detailed description of the heat transfer properties of heat sinks can now be discussed.…”

Section: Boundary Conditions and Governing Equationsmentioning

confidence: 99%

“…The viscosity value, thermal capacity and the density of the nano-fluid of the nano-fluid was obtained from the following relationships: 31–34 …”

Section: Boundary Conditions and Governing Equationsmentioning

confidence: 99%

Effect of nano-fluid types on the improvement of heat transfer in a micro-channel with regular hexagonal pattern

Emami

Bonab

Mohammadiun

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part E:

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Micro channels are widely used in different industries. The investgations on heat transfer improvments of these instruments are of significant inportance. At hte present study, the influence of different nano-fluids and geometrical charectrestics on the thermal performance of a heat sink which is especially for for micro-channels are investigated. In the present study, the authors investigated the Nusselt number and pressure drop in differential geometries and Reynolds numbers (Re). Then the micro-channel was investigated with different heat flux (q).In the first step, the micro-channel was examined and the final numerical results showed that the hexagonal cross-section can improve heat transfer about 9%. At the second step and after selecting appropriate parameters, the effect of three nano-particles (Al2O3 - CuO- TiO2) were studied. The results presented that aluminum oxide (Al2O3) has the best heat transfer rate among the mentioned nano-fluids. With the presence of nano-particles (Al2O3, φ = 4%) an increment of 40% in heat transfer rate, for the hexagonal cross section was achieved compare to rectangular cross section with water as working fluid.

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