A CFD study on turbulent forced convection flow of Al<sub>2</sub>O<sub>3</sub>-water nanofluid in semi-circular corrugated channel

Ajeel, Raheem K.; Salim, Wan Saiful Islam Wan

doi:10.1088/1757-899x/243/1/012020

Cited by 5 publications

(3 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Heat transfer enhancement is more efficient with longitudinal vortices than with transverse vortices. Although the thermal system's thermal performance can be archived, It can be observed that there is a penalty for pressure drop, and therefore the wings were used effectively and for the aim of improving heat transfer in the modern thermal structure, the reason for this is because it may generate a longitudinal vortex that cuts the main flow in addition to reducing pressure loss [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Turbulent Fluid Flow and Heat Transfer Enhancement Using Novel Vortex Generator

Shlash¹,

KOÇ>

2022

ARFMTS

View full text Add to dashboard Cite

One of several effective methods for improving heat transfer in heat exchangers is the use of vortex generators in channels. The flow of fluid through a channel with a vortex generator is disrupted by the development of recirculation zones on the step wall, which improves fluid mixing and heat transmission. The current work investigates the flow and heat transfer of turbulent fluid flow through channels with various vortex generator designs mathematically (triangular, half-circle, and quarter circle). The finite volume method (FVM) is used to discretize and solve the continuity, momentum, and energy equations. The SIMPLE algorithm approach is used to connect the pressure and velocity fields within the domain. The effect of geometrical factors such as step height (2, 3, 4, 5, and 6 mm) on the flow and heat fields is demonstrated and analyzed, as is the effect of Reynolds number. As the step height increases, so do the surface Nusselt number and skin friction coefficient, which peak at 4 mm. According to the findings, as Re increases, so does the average Nusselt number. The quarter circle vortex generator has the best thermal-hydraulic performance at a 4 mm amplitude height, followed by the triangle vortex generator. The simulation results are consistent with those found in the literature.

show abstract

Section: Introductionmentioning

confidence: 99%

Turbulent Fluid Flow and Heat Transfer Enhancement Using Novel Vortex Generator

Shlash¹,

KOÇ>

2022

ARFMTS

View full text Add to dashboard Cite

show abstract

“…As passive devices are easily installed and no external energy supply is required, these have been commonly implemented as alternative to active devices [66]. Examples of passive methods are rough surfaces [67,68]; artificial roughnessribs [69,70], corrugated surfaces [9,71,72], longitudinal fins [73]; extended surfacesbaffles [59,74,75]; swirl flow devices [76,77]; coiled tubes [78][79][80]; and flow additives as nanofluids (NF). NFs are produced by the addition of suspended nanoparticles (e.g.…”

Section: Heat Exchangersmentioning

confidence: 99%

Overview on the hydrodynamic conditions found in industrial systems and its impact in (bio)fouling formation

Fernandes

Gomes

Simões

et al. 2021

Chemical Engineering Journal

View full text Add to dashboard Cite

Biofouling is the unwanted accumulation of deposits on surfaces, composed by organic and inorganic particles and (micro)organisms. Its occurrence in industrial equipment is responsible for several drawbacks related to operation and maintenance costs, reduction of process safety and product quality, and putative outbreaks of pathogens. The understanding on the role of operating conditions in biofouling development highlights the hydrodynamic conditions as key parameter. In general, (bio)fouling occurs in a higher extension when laminar flow conditions are used. However, the characteristics and resilience of biofouling are highly dependent on the hydrodynamic conditions under which it is developed, with turbulent conditions being associated to recalcitrant biodeposits. In industrial settings like heat exchangers, fluid distribution networks and stirred tanks, hydrodynamics plays a dual function, affecting the process effectiveness while favouring biofouling formation. This review summarizes the hydrodynamics played in conventional industrial settings and provides an overview on the relevance of hydrodynamic conditions in biofouling development as well as in the effectiveness of industrial processes.

show abstract

“…Recently, Ajeel and Salim [23] examined the impact of nanofluid with aluminum oxide nanoparticles on the heat transfer and in semi-circular corrugated channel numerically. Symmetry configuration for corrugation profile of semicircle has been employed.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigations of flow and heat transfer enhancement in a semicircle zigzag corrugated channel using nanofluids

Ajeel¹,

Salim²,

Hasnan³

2018

IJHT

View full text Add to dashboard Cite

Thermal and hydraulic characteristics of turbulent nanofluid flow in a semicircle zigzag corrugated channel are numerically investigated by implementing the finite volume method (FVM) to describe the governing equations. Adiabatic condition for the straight walls, constant heat flux for the corrugated walls, and zigzag configuration of semicircle corrugated channel was examined. The performance of a semicircle zigzag corrugated channel with four types of nanofluids (ZnO, Al2O3, CuO, and SiO2), with four various nanoparticle volume fractions of 2%, 4%, 6% and 8% using water as base fluid is thoroughly analyzed and discussed. The nanoparticles diameter, another parameter taken into consideration, varied from 20 to 80 nm. Results show that the zigzag profile of semicircle corrugated channel has a great impact on the thermal performance compared with flat profile. The Nusselt number dropped as the nanoparticle diameter grew; however, it grew as the volume fraction of nanoparticles and Reynolds number increased. In addition, semicircle corrugated channel shows improvement in heat transfer of 1.5-2.7 times better than flat channel, with increase in the average Nusselt number of 170%. The present investigation uncovers that these semicircle zigzag corrugated channels have favorable circumstances by utilizing nanofluids, which leads to promote the thermal performance of thermal devices and make it more compact.

show abstract

A CFD study on turbulent forced convection flow of Al₂O₃-water nanofluid in semi-circular corrugated channel

Cited by 5 publications

References 13 publications

Turbulent Fluid Flow and Heat Transfer Enhancement Using Novel Vortex Generator

Turbulent Fluid Flow and Heat Transfer Enhancement Using Novel Vortex Generator

Overview on the hydrodynamic conditions found in industrial systems and its impact in (bio)fouling formation

Numerical investigations of flow and heat transfer enhancement in a semicircle zigzag corrugated channel using nanofluids

Contact Info

Product

Resources

About

A CFD study on turbulent forced convection flow of Al2O3-water nanofluid in semi-circular corrugated channel

Cited by 5 publications

References 13 publications

Turbulent Fluid Flow and Heat Transfer Enhancement Using Novel Vortex Generator

Turbulent Fluid Flow and Heat Transfer Enhancement Using Novel Vortex Generator

Overview on the hydrodynamic conditions found in industrial systems and its impact in (bio)fouling formation

Numerical investigations of flow and heat transfer enhancement in a semicircle zigzag corrugated channel using nanofluids

Contact Info

Product

Resources

About

A CFD study on turbulent forced convection flow of Al₂O₃-water nanofluid in semi-circular corrugated channel