Effect of Lateral End Plates on Flow Crossing a Yawed Circular Cylinder

Liang, Hui; Duan, Riqiang

doi:10.3390/app9081590

Cited by 17 publications

(8 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Yao et al [9] focused on the influence of turbulence on the wind pressure and aerodynamic behavior of smooth circular cylinders. Liang and Duan [12] studied numerically the flow past a yawed circular cylinder using large eddy simulation. They pointed out that the boundary condition of the two end-plates has a significant effect on the flow behaviors in the wake.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Flow over an object is omnipresent both in nature [1][2][3] and in many engineering applications [4][5][6]. For instance, the motion of swimming and flying animals [1], growth of stalagmites [2], fall motion of hailstones [3], motion of pollutants in the atmosphere [7], complex motion of the drill string in the field of petroleum engineering [8], and flow over bridge piers, chimney stacks, offshore structures, and tower structures in civil engineering [9], aircrafts in the field of aerospace [10], nuclear fuel rods in the atomic field [5], power battery cooling structures in the field of new energy vehicles [11], heat exchanger tubes in thermal engineering [12], etc. The fluid dynamic drag [13][14][15], active and passive methods for drag reduction [16][17][18], boundary layer flow [19], flow-induced vibration [5], behavior of turbulent fluid motion [20], and instability in the wake shear layer [21][22][23] are of interest in numerous fields.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Similarities of Flow and Heat Transfer around a Circular Cylinder

Duan

2020

Symmetry

View full text Add to dashboard Cite

Modeling fluid flows is a general procedure to handle engineering problems. Here we present a systematic study of the flow and heat transfer around a circular cylinder by introducing a new representative appropriate drag coefficient concept. We demonstrate that the new modified drag coefficient may be a preferable dimensionless parameter to describe more appropriately the fluid flow physical behavior. A break in symmetry in the global structure of the entire flow field increases the difficulty of predicting heat and mass transfer behavior. A general simple drag model with high accuracy is further developed over the entire range of Reynolds numbers met in practice. In addition, we observe that there may exist an inherent relation between the drag and heat and mass transfer. A simple analogy model is established to predict heat transfer behavior from the cylinder drag data. This finding provides great insight into the underlying physical mechanism.

show abstract

Section: Literature Reviewmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Similarities of Flow and Heat Transfer around a Circular Cylinder

Duan

2020

Symmetry

View full text Add to dashboard Cite

show abstract

“…At the same time, the investigation of combined convection circulation about a tilted cylinder has not been analyzed so far. The examination of motion along tilted cylinder is very useful for heat exchangers design [15]. The fluid flow past yawed and unyawed cylindrical geometries extensively occurs in various engineering-related applications, like tow cables, chimney stacks, different towers, sub-sea pipelines, risers, heat exchangers and overhead cables [16,17].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Mixed Convective Flow over a Moving Yawed Cylinder Driven by Buoyancy

2021

View full text Add to dashboard Cite

The fluid flow over a yawed cylinder is useful in understanding practical significance for undersea applications, for example, managing transference and/or separation of the boundary layer above submerged blocks and in suppressing recirculating bubbles. The present analysis examines nonlinear mixed convection flow past a moving yawed cylinder with diffusion of liquid hydrogen. The coupled nonlinear control relations and the border restrictions pertinent to the present flow problem are nondimensionalized by using nonsimilar reduction. Further, implicit finite difference schemes and Quasilinearization methods are employed to solve the nondimensional governing equations. Impact of several nondimensional parameters of the analysis on the dimensionless velocity, temperature and species concentration patterns and also on Nusselt number, Sherwood number and friction parameter defined at the cylinder shell is analyzed through numerical results presented in various graphs. Velocity profiles can be enhanced, and the coefficients of friction at the surface can be reduced, for increasing values of velocity ratio parameters along chordwise as well as spanwise directions. Species concentration profile is reduced, while the Sherwood number is enhanced, for growth of the Schmidt number and yaw angles. Furthermore, for an increasing value of yaw angle, skin-friction coefficient in chordwise direction diminishes in opposing buoyancy flow case, whereas the results exhibit the opposite trend in assisting buoyancy flow case. Moreover, very importantly, for increasing magnitude of nonlinear convection characteristic, the liquid velocity and surface friction enhance in spanwise direction. Further, for increasing magnitude of combined convection characteristics, velocity profiles and coefficient of friction at the surface enhance in both spanwise and chordwise directions. Moreover, we have observed that there is no deviation for zero yaw angle in Nusselt number and Sherwood number.

show abstract

“…The influences of fluid flow is existing universally in nature [1][2][3] and in countless engineering applications [4][5][6]. For example, movement of animals [1], stalagmites development [2], dropping of hailstones [3], the surveillance of atmospheric pollutions [7], suspected movement of the drills in the petroleum engineering [8], gesticulation over bridges, chimney stacks and the towers in the field of civil sciences [9], the motion of airplanes in aerospace [10], the rods full of nuclear fuel in atomic engineering [5], cooling process of the batteries with power in the field of energy [11], developments of the heat exchangers [12], etc. Understanding the convection and fluid's behavior through the object especially on the curved shape is the main thing observed widely in so many industrial and engineering applications for generation of energy, thermal processing of apparatus as heat exchanger [13][14][15][16], and in the field of magneto-aerodynamics [17][18].…”

Section: Introduction and Literature Reviewmentioning

confidence: 99%

Analysis of Power Law Fluids and the Heat Distribution on a Facing Surface of a Circular Cylinder Embedded in Rectangular Channel Fixed With Screen: A Finite Element’s Analysis

et al. 2021

View full text Add to dashboard Cite

The current article is an understanding of heat transfer and non-Newtonian fluid flow with implications of the power-law fluid on a facing surface of the circular cylinder embedded at the end of the channel containing the screen. The cylinder is fixed with an aspect ratio of 4:1 from height to the radius of the cylinder. The simulation for the fluid flow and heat transfer was obtained with variation of the angle of screen 63    , Reynolds number 1000 Re 10,000  and the power-law index 0.7 1.3 n  by solving the two-dimensional incompressible Navier-Stokes equations and the energy equation with screen boundary condition and slip walls. The results will be in a good match with asymptotic solution given in the literature. The results are presented through graph plots for the non-dimensional velocity, temperature, mean effective thermal conductivity, heat transfer coefficient, and the local Nusselt number on the front surface of the circular cylinder. It was found that the ratio between the input velocity to the present velocity on the surface of the circular cylinder remains consistent and reaches up to a maximum of 2.2% and the process of heat transfer does not affect by the moving of the screen and clearly with the raise of power-law indexes the distribution of the heat transfer upsurges. On validation with two experimentally derived correlations, it was also found that the results obtained for the shear-thinning fluid are more precise than the numerically calculated results for the Newtonian as well as shear-thickening cases. Finally, we suggest the necessary measures to enrich the the development of convection when observing with the strong effects influenced by screens or screen boundary conditions.

show abstract

Effect of Lateral End Plates on Flow Crossing a Yawed Circular Cylinder

Cited by 17 publications

References 22 publications

Similarities of Flow and Heat Transfer around a Circular Cylinder

Similarities of Flow and Heat Transfer around a Circular Cylinder

Nonlinear Mixed Convective Flow over a Moving Yawed Cylinder Driven by Buoyancy

Analysis of Power Law Fluids and the Heat Distribution on a Facing Surface of a Circular Cylinder Embedded in Rectangular Channel Fixed With Screen: A Finite Element’s Analysis

Contact Info

Product

Resources

About