Numerical studies on the effect of baffle on the heat transfer and flow in cross-corrugated triangular ducts

Liang, Caihang; Feng, Caining; Lei, T.Y.; Li, Z X

doi:10.1088/1755-1315/238/1/012086

Cited by 6 publications

(1 citation statement)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They suggested two correlations related to Nusselt number depending on boundary conditions of constant heat flux and temperature in their work. Liang et al [10] carried out a numerical study to analyze the effect of baffle on flow and temperature distribution in the cross-corrugated triangular channels having six different baffle installations by using a k-ω turbulence model. They obtained as a result that the Nusselt number of the duct with baffle for the case of setup 6 was 1.5-1.6 times higher than that of the channel without baffle case.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer and pressure drop evaluation of different triangular baffle placement angles in cross-corrugated triangular channels

Karabulut

2020

Therm sci

View full text Add to dashboard Cite

Plate heat exchangers have a widespread usage and the simplest parallel plate channel structures. Cross-corrugated ducts are basic channel geometries used in the plate heat exchangers. In this study, the increasing of heat transfer from the cross-corrugated triangular ducts by inserting triangular baffles with different placement angles into the channel upper side and pressure drop have been numerically investigated. Numerical calculations have been carried out to solve Navier-Stokes and energy equations by employing k-ε turbulence model as 3-D and steady with ANSYS-FLUENT program. While inlet temperature of the air used as working fluid is 293 K, constant surface temperature values of the the lower corrugated channel walls are 373 K. The height of the baffle and apex angle of the corrugated duct have been taken constant as 0.5 H and 60°, respectively. Investigated Reynolds number range is 1000-6000 while the baffle placement angles are 30°, 45°, 60°, and 90°. Numerical results of this study are within 3.53% deviation with experimental study existed in literature. The obtained results have been presented as mean Nusselt number temperature and pressure variations of the fluid for each baffle angle. The temperature and velocity vector contour distributions have been also assessed for different Reynolds numbers and baffle angles. The value of the Num for the corrugated channel with 60° baffle angle is 8.2% higher than that of the 90° for the Re = 4000. Besides, for Re = 1000 the value of the pressure drop is 39% lower in the channel with 60° baffle angle than that of 90°.

show abstract

Section: Introductionmentioning

confidence: 99%

Heat transfer and pressure drop evaluation of different triangular baffle placement angles in cross-corrugated triangular channels

Karabulut

2020

Therm sci

View full text Add to dashboard Cite

show abstract

Influence of membrane deflection on energy exchanger performance

Aminian,

Rahgozar,

Huizing

et al. 2023

Energy and Buildings

View full text Add to dashboard Cite

Heat transfer and thermal–hydraulic evaluations of cross-circular grooved rectangular flow ducts depending on rectangular baffle design parameters

Karabulut

2024

Eur. Phys. J. Plus

View full text Add to dashboard Cite

The cross-grooved rectangular flow ducts are largely used for plate heat exchangers. In this work, so as to better the heat transfer in cross-grooved rectangular ducts with circular grooves, rectangular baffles were located in the flow duct, and the influences of the rectangular baffle angles and heights on the features of heat transfer were numerically performed in detail. Equations of Navier–Stokes and energy were resolved by employing a program of Ansys-Fluent with k–ε turbulence model as steady and three-dimensional. Air employed as working fluid has a temperature of inlet 293 K while the circular groove’s wall temperature is 373 K. Rectangular baffles have various angles of 30°, 60°, and 90°, and heights of 0.25 H, 0.5 H, and 0.75 H. The mean Nusselt number (Num), temperature, turbulence kinetic energy (TKE), pressure, and PEC (Performance Evaluation Criterion) number of the flow duct with rectangular baffles were evaluated by comparing it with the cross-circular grooved channel non-baffle. Besides, the contours of velocity, turbulence kinetic energy, temperature, and velocity vector were exhibited for the cross-circular grooved rectangular channels with different baffle angles and height arrangements. Results were matched with experimental and numerical outcomes of the study found in the literature, and it was observed that they were fairly coherent. For Re = 6000, the number of Num increases by 180.48% in the duct with a 90° angle and 0.75 H baffle height compared to the duct non-baffle, and for 30° baffle angle, the PEC value at 0.25 H baffle height is 66.88% higher than that in the 0.5 H. Graphical Abstract Compared to the temperature contour distribution in the non-baffle state, the temperature gradient increases due to the turbulence intensity created by the inserting of baffles to the circular grooved ducts. When the baffle height is increased to 0.75 H, the increase in fluid temperatures toward the end of the ducts is the clearest evidence of this situation. Thus, while cooling increases in circular grooves, the temperature gradient in the duct above the circular grooved section gets better, especially in the case of 0.75 H height and 90° baffle angle. Temperature distribution contours of the ducts for non-baffle and with baffle of 90° angle and 0.75 H height for Re = 6000.

show abstract

Numerical studies on the effect of baffle on the heat transfer and flow in cross-corrugated triangular ducts

Cited by 6 publications

References 11 publications

Heat transfer and pressure drop evaluation of different triangular baffle placement angles in cross-corrugated triangular channels

Heat transfer and pressure drop evaluation of different triangular baffle placement angles in cross-corrugated triangular channels

Influence of membrane deflection on energy exchanger performance

Heat transfer and thermal–hydraulic evaluations of cross-circular grooved rectangular flow ducts depending on rectangular baffle design parameters

Contact Info

Product

Resources

About