Investigation of the flow around transverse cylinders

Sucker, D.; Brauer, Heinz

doi:10.1007/bf01681556

Cited by 87 publications

(25 citation statements)

References 8 publications

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“…The free stream Mach number in both cases was set to 0.3. The streamlines for the flow at 20 are shown in Figure 6 whereas Table 1 lists the separation length and angle and the drag coefficient in comparison with reference values from literature [14,15]. The agreement is quite satisfactory, only the separation angle is predicted too low, which might be due to the lack of considering the pressure gradient in the wall-layer.…”

Section: Laminar Flow Past a Circular Cylindermentioning

confidence: 51%

An immersed boundary method for simulating compressible viscous flow in complex geometries

Jastrow

Magagnato

2012

Advances in Fluid Mechanics IX

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This paper presents an immersed boundary method combined with a wall-layer approach implemented into an established flow solver. In the outer flow field, the compressible Navier-Stokes equations are solved using an approximate Riemann Solver whereas simplified boundary-layer equations are solved near the wall. Turbulence is accounted for by the one-equation model of Spalart-Allmaras in the outer flow region and by a mixing length eddy viscosity model with near wall damping in the wall layer. Computations performed for various test cases show good agreement with reference data found in literature.

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Section: Laminar Flow Past a Circular Cylindermentioning

confidence: 51%

An immersed boundary method for simulating compressible viscous flow in complex geometries

Jastrow

Magagnato

2012

Advances in Fluid Mechanics IX

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“…Its settling y-velocity approaches a constant value, which is the particle terminal velocity caused by the balance of gravitational and viscous forces. The viscous force is calculated using an empirical correlation provided by Sucker and Brauer [16] for a drag coe cient in a ow past a cylinder of unit length …”

Section: Resultsmentioning

confidence: 99%

Direct numerical simulation of settling of a large solid particle during bioconvection

Geng¹,

Кузнецов²

2005

Numerical Methods in Fluids

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SUMMARYSettling of a large solid particle in bioconvection ow caused by gyrotactic microorganisms is investigated. The particle is released from the top of the bioconvection chamber; its settling pattern depends on whether it is released in the centre of the bioconvection plume or at its periphery. The Chimera method is utilized; a subgrid is generated around a moving particle. The method suggested by Liu and Wang (Comput. Fluid 2004; 33:223-255) is further developed to account for the presence of a moving boundary in the streamfunction-vorticity formulation using the ÿnite-di erence method. A number of cases for di erent release positions of the particle are computed. It is demonstrated that bioconvection can either accelerate or decelerate settling of the particle depending on the initial position of the particle relative to the plume centre. It is also shown that the particle impacts bioconvection plume by changing its shape and location in the chamber.

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“…A comprehensive comparison of the drag coefficients obtained from this IFEM study and numerical experimental solution of others [13,17,18,31,[39][40][41][42] at different Reynolds numbers is presented in Table 1 and Fig. 6.…”

Section: Drag and Lift Coefficientsmentioning

confidence: 99%

Imposing rigidity constraints on immersed objects in unsteady fluid flows

Zhang

2008

Comput Mech

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Imposing rigidity constraints of an immersed elastic body in a transient flow field is not trivial. It requires solution stability and accuracy. In this paper, we present an efficient and accurate algorithm implemented to enforce fluid-structure interface constraints used in the immersed finite element method (IFEM). This interface treatment is a constraint applied onto the rigid bodies based on the fluid structure interaction force evaluated from the immersed solid object. It requires no ad hoc constants or adjustments, thus providing numerical stability and avoiding unnecessary trialand-error procedures in defining the stiffness of the elastic body. This force term can be evaluated for both uniform and nonuniform fluid grids based on the higher order interpolation function adopted in the IFEM. The ability in handling nonuniform interpolations offers the convenience in modeling arbitrary geometrical shapes and provides solution refinements around interfaces. The results we obtained from flow past a rigid cylinder demonstrate that this convenient way of constraining the interface is a reliable and robust numerical approach to solve unsteady fluid flow interacting with immersed rigid bodies.

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Investigation of the flow around transverse cylinders

Cited by 87 publications

References 8 publications

An immersed boundary method for simulating compressible viscous flow in complex geometries

An immersed boundary method for simulating compressible viscous flow in complex geometries

Direct numerical simulation of settling of a large solid particle during bioconvection

Imposing rigidity constraints on immersed objects in unsteady fluid flows

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