Simulation of the flow past a circular cylinder using an unsteady panel method

Ramos‐García, Néstor; Sarlak, Hamid; Andersen, Søren Juhl; Sørensen, Jens Nørkær

doi:10.1016/j.apm.2016.12.001

Cited by 13 publications

(4 citation statements)

References 18 publications

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“…Fortunately, reasonable results can be obtained if a simpler assumption is made of fixed separation points (Ramos-García et al 2017). It is commonly accepted that the separation angle of the flow past a cylinder depends on the Reynolds number.…”

Section: Discrete Vortex Methods For the Unsteady Wake Flow Of A 2-d Cmentioning

confidence: 99%

Frequency lock-in mechanism in flow-induced acoustic resonance of a cylinder in a flow duct

Hong

Wang

et al. 2019

J. Fluid Mech.

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Section: Discrete Vortex Methods For the Unsteady Wake Flow Of A 2-d Cmentioning

confidence: 99%

Frequency lock-in mechanism in flow-induced acoustic resonance of a cylinder in a flow duct

Hong

Wang

et al. 2019

J. Fluid Mech.

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“…There are usually four methods used for calculating viscous hydrodynamics, including the maternal estimation method [23], the restraint model test method [24], the CFD numerical calculation method [25], and the parameter identification method [26]. There are usually three methods used for calculating inertial hydrodynamics, including the plane motion mechanism method, the panel method [27], and the CFD numerical calculation method.…”

Section: ) Hydrodynamic Characteristicsmentioning

confidence: 99%

Development of Multibody Marine Robots: A Review

Kang

Zhang

et al. 2020

IEEE Access

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Multibody marine robots, representing a promising research and development area, have gained acute attention and response from civil and military fields. A multibody marine robot is a multibody system composed of multiple single-body marine robots (defined as a unit) in a certain topology. Such a system is generally characterized by underactuation, hyperredundancy, power distribution, modularization and so on. Compared with traditional single-body marine robots, multibody marine robots can carry greater loads and have more forms of motion, so they can meet more specialized functional requirements. At the same time, they also have more complex hydrodynamic characteristics due to their unique structures and motion forms. In this paper, the types, features, and hydrodynamic characteristics of typical multibody marine robots are reviewed and summarized based on the connection structures between units. In addition, the development trends of multibody marine robots are analyzed and discussed. This review work anticipates positive attention from future readers regarding multibody marine robots, which represent an important subarea of marine robots.

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“…The next problem considered is the unsteady flow past a circular cylinder. Extensive numerical data is available in the literature (Bijl et al, 2001;Ma and Karniadakis, 2002;Rajani et al, 2009;Ramos-García et al, 2017) for this problem. The Reynolds number (Re D ) for this problem is kept as 100 which is in the regime of laminar 2-D flow with periodic vortex shedding (Ma and Karniadakis, 2002).…”

Section: Flow Over a Circular Cylindermentioning

confidence: 99%

Towards developing an adaptive time stepping for compressible unsteady flows

Kalkote

Assam

Eswaran

2019

HFF

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Purpose The purpose of this paper is to solve unsteady compressible Navier–Stokes equations without the commonly used dual-time loop. The authors would like to use an adaptive time-stepping (ATS)-based local error control instead of CFL-based time-stepping technique. Also, an all-speed flow algorithm is implemented with simple low dissipation AUSM convective scheme, which can be computed without preconditioning which in general destroys the time accuracy. Design/methodology/approach In transient flow computations, the time-step is generally determined from the CFL condition. In this paper, the authors demonstrate the usefulness of ATS based on local time-stepping previously used extensively in ordinary differential equations (ODE) integration. This method is implemented in an implicit framework to ensure the numerical domain of dependence always contains the physical domain of dependence. Findings In this paper, the authors limit their focus to capture the unsteady physics for three cases: Sod’s shock-tube problem, Stokes’ second problem and a circular cylinder. The use of ATS with local truncation error control enables the solver to use the maximum allowable time-step, for the prescribed tolerance of error. The algorithm is also capable of converging very rapidly to the steady state (if there is any) after the initial transient phase. The authors present here only the first-order time-stepping scheme. An algorithmic comparison is made between the proposed adaptive time-stepping method and the commonly used dual time-stepping approach that indicates the former will be more efficient. Originality/value The original method of ATS based on local error control is used extensively in ODE integration, whereas, this method is not so popular in the computational fluid dynamics (CFD) community. In this paper, the authors investigate its use in the unsteady CFD computations. The authors hope that it would provide CFD researchers with an algorithm based on an adaptive time-stepping approach for unsteady calculations.

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Simulation of the flow past a circular cylinder using an unsteady panel method

Cited by 13 publications

References 18 publications

Frequency lock-in mechanism in flow-induced acoustic resonance of a cylinder in a flow duct

Frequency lock-in mechanism in flow-induced acoustic resonance of a cylinder in a flow duct

Development of Multibody Marine Robots: A Review

Towards developing an adaptive time stepping for compressible unsteady flows

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