Numerical investigation of fully developed periodic turbulent flow in a square channel fitted with 45° in-line V-baffle turbulators pointing upstream

Fawaz, H.E.; Badawy, M.T.S.; Rabbo, M.F. Abd; El-Feky, Amr Ahemd

doi:10.1016/j.aej.2017.02.020

Cited by 31 publications

(4 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Modeling the baffles in terms of their geometry is the goal and path of many researchers in order to update the thermal and energy performance of various solar exchangers (see Kamali and Binesh [12], Wang et al [13], Fawaz et al [14], Boonloi and Jedsadaratanachai [15], Tamna et al [16], Nanan et al [17], Menni [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] in Table 1). The effect of both deflector dimension and flow rate has also been analyzed for complex geometrical obstacles, such as helical baffles.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Heat Transfer by Oil/Multi-Walled Carbon Nano-Tubes Nanofluid

Boursas¹,

Salmi²,

Lorenzini³

et al. 2021

ACSM

View full text Add to dashboard Cite

The subject of the study is mainly based on thermal reinforcement by an oily fluid containing nanometer particles of carbon. The study is carried out by the presence of discontinuous bars in two different shapes, i.e. flat and V, inside a horizontal heat exchanger. The study relies on simulations in thermal and dynamic terms from the literature. The turbulence effect is diagnosed by applying the k-ε model, while the flow hydrothermal transport relationships are modeled based on the finite volume technique. Both the flow and heat-transfer aspects of all channel regions are studied and analyzed. The new heat-exchanger structure has been enhanced in the presence of these discontinuous bars by reducing the friction coefficient and eliminating stations with poor transfer of heat behind these deflectors.

show abstract

Section: Introductionmentioning

confidence: 99%

Enhanced Heat Transfer by Oil/Multi-Walled Carbon Nano-Tubes Nanofluid

Boursas¹,

Salmi²,

Lorenzini³

et al. 2021

ACSM

View full text Add to dashboard Cite

show abstract

“…The configuration with (BR=0.7, PR=2 and Re=5000) was selected to be the best configuration that provided the highest thermohydraulic performance factor. Fawaz et al (2018) analysed numerically the turbulent flow in a square channel having V-baffles mounted in the lower and upper walls with an angle of attack equal to 45° and an in-line arrangement. Re number was varied from 5000 to 25000.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of a Solar Air Heater (SAH) with Triangular Artificial Roughness Having a Curved Top Corner

Zina

Filali

Laouedj

et al. 2019

JAFM

View full text Add to dashboard Cite

In the present study, numerical investigation of two-dimensional incompressible air flow through a solar air heater (SAH) with a triangular artificial roughness having a curved top corner is performed using ANSYS Fluent 15.0 based finite volume method. The geometrical parameters of the triangular ribs having a curved top corner such as the roughness height ratio (e/D = 0.021, 0.03 and 0.042) and the roughness pitch ratio (p/e =7.14, 10.70, 14.28 and 17.86) have been investigated for a varied Reynolds number between 3800 to 18000. Flow and energy governing equations were solved with the accosiation of two transport equation for the turbulence kinetic energy k and the dissipation rate ɛ. The RNG k-ε turbulent model have been selected to be the more appropriate turbulence model for the present study. Results indicates that the values of Nusselt number and friction factor strongly depend on the roughness relative height e/D, relative pitch p/e and the value of Re number. The best solar air heater performance could be obtained for e/D=0.042 and p/e=7.14.

show abstract

“…They showed that the shell-side heat transfer coefficient and overall heat transfer coefficient are improved by 22.3-32.6% and 18.1-22.5%, respectively. A numerical investigation for fully developed turbulent flow in a square duct fitted with 45° in-line V-baffle pairs mounted on both upper and lower walls was conducted by Fawaz et al [17] in order to examine the changes in flow structure and thermal performance, using air as the working fluid at Re ranging from 5,000 to 25,000. Effect of various baffle blockage ratios (BR = 0.2, 0.4 and 0.6) and baffles pitch ratios (PR = 0.5,1 and 1.5) on flow behavior and heat transfer were investigated.…”

mentioning

confidence: 99%

Turbulent Heat Transfer Characteristics of a W-Baffled Channel Flow - Heat Transfer Aspect

Menni

Chamkha

Makinde

2020

DDF

View full text Add to dashboard Cite

In this work, the thermal behavior of a turbulent forced-convection flow of air in a rectangular cross section channel with attached W-shaped obstacles is investigated. The continuity, momentum and energy equations employed to control the heat and velocity in the computational domain. The turbulence model of k-ε is employed to simulate the turbulence effects. The finite volume method with SIMPLE algorithm is employed as the solution method. The results are reported temperature, local and average Nusselt numbers, and mean velocity contours. The subject is relevant and important for industrial applications.

show abstract

Numerical investigation of fully developed periodic turbulent flow in a square channel fitted with 45° in-line V-baffle turbulators pointing upstream

Cited by 31 publications

References 19 publications

Enhanced Heat Transfer by Oil/Multi-Walled Carbon Nano-Tubes Nanofluid

Enhanced Heat Transfer by Oil/Multi-Walled Carbon Nano-Tubes Nanofluid

Numerical Investigation of a Solar Air Heater (SAH) with Triangular Artificial Roughness Having a Curved Top Corner

Turbulent Heat Transfer Characteristics of a W-Baffled Channel Flow - Heat Transfer Aspect

Contact Info

Product

Resources

About