Results 241 to 250 of about 5,210,544 (313)
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Numerical Errors in Unsteady Flow Simulations
Journal of Verification, Validation and Uncertainty Quantification, 2019This article discusses numerical errors in unsteady flow simulations, which may include round-off, statistical, iterative, and time and space discretization errors.
L. Eça +3 more
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Unsteady Flows in an Unsteady Environment
The Physics of Fluids, 1965This theoretical study treats flows behind a shock or sound wavefront propagating into an environment which is itself allowed to be undergoing some generally unsteady (i.e., nonstationary, nonuniform, and thus nonisentropic) motion. Interest is with centrally symmetric geometries. Considerations regarding self-similarity are investigated and conditions
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DDES analysis of the unsteady wake flow and its evolution of a centrifugal pump
Renewable Energy, 2019In the present paper, to investigate the unsteady wake flow and its evolution at different moments when the blade sweeps the volute tongue, numerical simulation method is applied to discuss the flow field in detail based on the DDES (Delayed Detached ...
Ning Zhang, Xiaokai Liu, B. Gao, Bin Xia
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Steady and unsteady transonic flow
16th Aerospace Sciences Meeting, 1978An investigation of the transonic flow over a circular arc airfoil was conducted to obtain basic information for turbulence modeling of shock-induced separated flows and to verify numerical computer codes which are being developed to simulate such flows. The investigation included the employment of a laser velocimeter to obtain data concerning the mean
H. L. Seegmiller +2 more
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Haptical exploration of an unsteady flow
World Haptics 2009 - Third Joint EuroHaptics conference and Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems, 2009This paper investigates a human-centered approach for the exploration of large data sets resulting from CFD (Computational Fluid Dynamics) simulations. In a VR (Virtual Reality) immersive environment we propose to couple haptic feedbacks with visual rendering.
Bob Ménélas +3 more
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Static Visualization of Unsteady Flows by Flow Steadification
202099
Steve Wolligandt +3 more
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2009
Abstract This chapter focuses on one-dimensional flows and is concerned with changes in the downstream direction only. In general, the average downstream velocity, U, is a function of space (downstream location, X) and time, t, that is,
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Abstract This chapter focuses on one-dimensional flows and is concerned with changes in the downstream direction only. In general, the average downstream velocity, U, is a function of space (downstream location, X) and time, t, that is,
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Unsteady Couette granular flows
Physics of Fluids, 1997Unsteady Couette granular flows are investigated both theoretically and by the means of the discrete element method (DEM). Theoretical formulation of the problem is based on the kinetic theory for smooth, nearly elastic particles. The resulting boundary value problem is solved numerically for two particular types of flows: (a) transient Couette flows ...
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Journal of Fluids Engineering, 1994
The flow in a diffuser is unsteady in the range of optimum pressure recovery; diffusers can therefore be a major source of noise in pipework systems. A theory is developed to predict the frequency of this noise and good agreement with experimental results, for both conical and rectangular diffusers, is demonstrated. The acoustics of the duct to which a
A. H. M. Kwong, A. P. Dowling
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The flow in a diffuser is unsteady in the range of optimum pressure recovery; diffusers can therefore be a major source of noise in pipework systems. A theory is developed to predict the frequency of this noise and good agreement with experimental results, for both conical and rectangular diffusers, is demonstrated. The acoustics of the duct to which a
A. H. M. Kwong, A. P. Dowling
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UNSTEADY COMPRESSIBLE FLOW IN DUCTS
The Quarterly Journal of Mechanics and Applied Mathematics, 1954SUMMARY A rarefaction wave is produced in a two-dimensional channel by the impulsive retraction of a piston. In a finite section of the channel there is a slight variation in cross-section, and the effect of this variation on the rarefaction wave is considered.
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