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article

Robust low‐dissipative scheme for curvilinear grids

Ghulam M. Arshed, Ovais U. Khan

International Journal for Numerical Methods in Fluids > 93 > 5 > 1540 - 1563

This work describes a detailed mathematical procedure in relation to a novel third‐order WENO scheme for the inviscid term of a system of nonlinear equations in the generalized grid system. The scheme developed minimizes the linear and nonlinear sources of dissipation error associated with the classical fifth‐order WENO scheme. The former is minimized by optimizing the resolving efficiency of the...

article

Numerical computation of low Reynolds number viscous flow past bluff bodies

Md. Shahjada Tarafder, Miad Al Mursaline

International Journal of Applied Mechanics and Engineering > 2020 > Vol. 25, no. 3 > 133--157

This article presents a two-dimensional steady viscous flow simulation past circular and square cylinders at low Reynolds numbers (based on the diameter) by the finite volume method with a non-orthogonal body-fitted grid. Diffusive fluxes are discretized using central differencing scheme, and for convective fluxes upwind and central differencing schemes are blended using a ‘deferred correction’ approach...

article

Stagnation flow of hybrid nanoparticles with MHD and slip effects

Nadeem Abbas, Muhammad Y. Malik, Sohail Nadeem

Heat Transfer—Asian Research > 49 > 1 > 180 - 196

The flow of hybrid nanoparticles with significant physical parameters with different base fluids in the presence of Biot number, velocity slip, and MHD effects has not been explored so far, particularly for a circular cylinder. Therefore, the current report is presented to offer a numerical solution for hybrid nanoparticles with base fluids (water and ethylene glycerol) via a circular cylinder. The...

article

DNS in evolution of vorticity and sign relationship in wake transition of a circular cylinder: (pure) mode A

L. M. Lin, Z. R. Tan

Acta Mechanica Sinica > 2019 > 35 > 6 > 1131-1149

In the present paper, the spatio-temporal evolution of vorticity in the first wake instability, i.e., (pure) mode A, is investigated in order to understand the wake vortex dynamics and sign relationships among vorticity components. Direct numerical simulation (DNS) for the flow past a circular cylinder is performed, typically at a Reynolds number of 200, in the three-dimensional (3-D) wake transition...

article

Asymptotic Investigation of Hydrodynamic Forces Acting on an Oscillating Cylinder at Finite Streaming Reynolds Numbers

A. N. Nuriev, A. G. Egorov

Lobachevskii Journal of Mathematics > 2019 > 40 > 6 > 794-801

The paper is devoted to the study of the problem of high-frequency low-amplitude harmonic oscillations of a circular cylinder in a viscous incompressible fluid. The study develops the classical method of successive asymptotic expansions of a solution into internal and outer, steady and oscillating components in terms of a small parameter. The case of finite streaming Reynolds numbers is considered...

article

Structural bifurcation analysis of vortex shedding from shear flow past circular cylinder

Atendra Kumar, Rajendra K. Ray

Computational and Applied Mathematics > 2019 > 38 > 3 > 1-25

In this paper, the unsteady flow separation of two-dimensional (2-D) incompressible shear flow past a circular cylinder is studied using theoretical structural bifurcation analysis based on topological equivalence. The stream function vorticity form of Navier–Stokes (N–S) equations in cylindrical polar coordinates are considered as the governing equations. Numerical simulations are performed, using...

article

Experimental investigation on the flow around a circular cylinder with upstream splitter plate

Xiao Zhou, JinJun Wang, Ye Hu

Journal of Visualization > 2019 > 22 > 4 > 683-695

The splitter plate has been widely applied in controlling the flow around a circular cylinder due to its advantages of being easy to install and simplicity. The experiment was conducted with particle image velocimetry to investigate the control effect of the upstream splitter plate. It is found that, for the rigid plate case, the variation in drag coefficient with Re is similar to the bare cylinder...

article

Conjugate heat transfer from a circular cylinder to a power‐law non‐Newtonian fluid

Majid Asnaashari, Amir Tohidi

Heat Transfer—Asian Research > 48 > 4 > 1466 - 1482

In this paper, conjugate heat transfer from a circular cylinder with a heat source to a non‐Newtonian power‐law fluid is studied. Numerical calculations are carried out in an unconfined computational domain for Reynolds numbers (

5 \leq Re \leq 40

), power‐law indices (

0.6 \leq n \leq 1.4

), and Prandtl numbers (

1 \leq \Pr \leq 50

) with different heat source values. The pressure coefficient, value, and position of maximum...

article

Translation surfaces with non-zero constant mean curvature in Euclidean space

Thomas Hasanis

Journal of Geometry > 2019 > 110 > 2 > 1-8

We prove that the only surface in 3-dimensional Euclidean space $${\mathbb {R}}^3$$ R3 with constant and non-zero mean curvature H, constructed by the sum of a planar curve and a space curve, is the circular cylinder of radius $$\frac{1}{2|H|}$$ 12|H| .

article

Boundary-Layer Separations of Mixed Convection Flow Past an Isothermal Circular Cylinder

Nepal Chandra Roy, Tajnin Rahman, Salaika Parvin

International Journal of Applied and Computational Mathematics > 2019 > 5 > 3 > 1-19

This study reveals the boundary-layer separations of unsteady mixed convection flow of incompressible fluid past a circular cylinder which is kept at a constant temperature. The governing equations are made dimensionless using an appropriate transformation. These equations are solved with the use of finite difference method. We also solve the problem using perturbation method for small time and local...

article

Accreted ice mass ratio (k‐factor) for rotating wind turbine blade profile and circular cylinder

Pavlo Sokolov, Jia Yi Jin, Muhammad S. Virk

Wind Energy > 22 > 4 > 447 - 457

This paper describes a study to investigate the relation between ice accretion on a rotating wind turbine blade profile (airfoil) and a reference collector (circular cylinder). This relation, known as “k‐factor,” describes the ratio of accreted ice mass on a reference collector and wind turbine blade profile. Analyses are carried out by performing a series of multiphase numerical simulations and ISO...

article

Numerical simulation of forced convection of nanofluid around a circular cylinder

Korib, Kamel, Ihaddadene, Nabila, Bouakkaz, Rafik, Khelili, Yacine

Archives of Thermodynamics > 2019 > 40 > 2

article

Numerical simulation of forced convection of nanofluid around a circular cylinder

Kamel Korib, Nabila Ihaddadene, Rafik Bouakkaz, Yacine Khelili

Archives of Thermodynamics > 2019 > Vol. 40, no 2 > 3--16

In this study a steady flow-field and heat transfer through a copper-water nanofluid around a circular cylinder, under the influence of both the standard thermal boundary conditions, i.e., uniform heat flux and constant wall temperature) was investigated numerically by using a finitevolume method for Reynolds numbers from the range 10–40. Furthermore, the range of nanoparticle volume fractions considered...

article

Numerical simulations of linearly stratified flow past submerged bodies

W. Ma, Y. Li, Y. Ding, K. Hu, more

Polish Maritime Research > 2018 > S 3 > 68--77

In this study, a methodology was presented to predict density stratified flows in the near-field of submerged bodies. The energy equation in temperature form was solved coupled with momentum and mass conservation equations. Linear stratification was achieved by the definition of the density as a function of temperature. At first, verifications were performed for the stratified flows passing a submerged...

article

Experimental investigation on the efficiency of circular cylinder-based wind energy harvester with different rod-shaped attachments

Gang Hu, K.T. Tse, Minghai Wei, R. Naseer, more

Applied Energy > 2018 > 226 > C > 682-689

The performance of a circular cylinder-based piezoelectric wind energy harvester with two small-size rod-shaped attachments on the main circular cylinder was experimentally investigated. The rod had three different cross-sectional shapes: circular, triangular, and square. The two rods were attached on two sides of the main circular cylinder at a series of circumferential locations. They were parallel...

article

Free Cavitational Deceleration of a Circular Cylinder in a Liquid after Impact

M. V. Norkin

Journal of Applied and Industrial Mathematics > 2018 > 12 > 3 > 510-518

The problem is considered about the vertical continuous impact and subsequent free deceleration of a circular cylinder semi-immersed in a liquid. The specificity of this problem is that, under certain conditions, some areas of low pressure near the body appear and the attached cavities are formed. The separation zones and the motion law of the cylinder are unknown in advance and have to be determined...

article

Lift Force Generation of a Moving Circular Cylinder with a Strip-Plate Set Downstream in Cruciform Arrangement: Flow Field Improving Using Tip Ends

Withun Hemsuwan, Kasumi Sakamoto, Tsutomu Takahashi

International Journal of Aeronautical and Space Sciences > 2018 > 19 > 3 > 606-617

A new concept of generating steady lift on a circular cylinder in uniform flow has been developed. A strip plate is placed behind a cylinder in cruciform arrangement with a suitable gap for employing the longitudinal vortex (LV). When the upstream cylinder moves parallel to the strip plate, the LV appears behind the moving cylinder near the crisscross region. The steady lift is produced by the aerodynamic...

article

Unsteady free surface flow above a moving circular cylinder

V. K. Kostikov, N. I. Makarenko

Journal of Engineering Mathematics > 2018 > 112 > 1 > 1-16

A problem on non-stationary free surface flow of infinitely deep ideal fluid generated by the motion of a submerged body is considered. The water wave problem is reduced to the integral–differential system of equations for the functions defining free surface shape, normal, and tangential velocity components on the free boundary. Small-time asymptotic solution is constructed for the case of circular...

article

Viscous near-wall flow in a wake of circular cylinder at moderate Reynolds numbers

D. I. Okhotnikov, V. M. Molochnikov, A. B. Mazo, A. V. Malyukov, more

Thermophysics and Aeromechanics > 2017 > 24 > 6 > 873-882

Here we present the results of experimental investigation of a cross flow around a circular cylinder mounted near the wall of a channel with rectangular cross section. The experiments were carried out in the range of Reynolds numbers corresponding to the transition to turbulence in a wake of the cylinder. Flow visualization and SIV-measurements of instantaneous velocity fields were carried out. Evolution...

article

A comprehensive investigation of vortex induced vibration effects on the heat transfer from a circular cylinder

Ehsan Izadpanah, Yasser Amini, Ali Ashouri

International Journal of Thermal Sciences > 2018 > 125 > C > 405-418

In this paper, the effect of vortex induced vibration (VIV) on convective heat transfer from an elastically mounted rigid circular cylinder in cross-flow is investigated numerically. The motion of cylinder is modeled by using a mass-spring-damping system. The effect of reduced velocity and damping ratio on the vortex formation, vortex shedding process, cylinder displacement amplitude, Nusselt number...

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Search results

Robust low‐dissipative scheme for curvilinear grids

Numerical computation of low Reynolds number viscous flow past bluff bodies

Stagnation flow of hybrid nanoparticles with MHD and slip effects

DNS in evolution of vorticity and sign relationship in wake transition of a circular cylinder: (pure) mode A

Asymptotic Investigation of Hydrodynamic Forces Acting on an Oscillating Cylinder at Finite Streaming Reynolds Numbers

Structural bifurcation analysis of vortex shedding from shear flow past circular cylinder

Experimental investigation on the flow around a circular cylinder with upstream splitter plate

Conjugate heat transfer from a circular cylinder to a power‐law non‐Newtonian fluid

Translation surfaces with non-zero constant mean curvature in Euclidean space

Boundary-Layer Separations of Mixed Convection Flow Past an Isothermal Circular Cylinder

Accreted ice mass ratio (k‐factor) for rotating wind turbine blade profile and circular cylinder

Numerical simulation of forced convection of nanofluid around a circular cylinder

Numerical simulation of forced convection of nanofluid around a circular cylinder

Numerical simulations of linearly stratified flow past submerged bodies

Experimental investigation on the efficiency of circular cylinder-based wind energy harvester with different rod-shaped attachments

Free Cavitational Deceleration of a Circular Cylinder in a Liquid after Impact

Lift Force Generation of a Moving Circular Cylinder with a Strip-Plate Set Downstream in Cruciform Arrangement: Flow Field Improving Using Tip Ends

Unsteady free surface flow above a moving circular cylinder

Viscous near-wall flow in a wake of circular cylinder at moderate Reynolds numbers

A comprehensive investigation of vortex induced vibration effects on the heat transfer from a circular cylinder

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