نتایج جستجو برای: cavity flow

تعداد نتایج: 556238  

2014
J. Y. Zhu Z. W. Hu D. J. Thompson

Aerodynamic noise becomes significant for high-speed trains but its prediction in an industrial context is difficult. The flow and aerodynamic noise behaviour of a simplified high-speed train bogie at scale 1:10 are studied here through numerical simulations. The bogie is situated in the bogie cavity and cases without and with a fairing are considered, allowing the shielding effect of the bogie...

Propane combustion in a trapped vortex combustor (TVC) is characterized via large eddy simulation coupled with filtered mass density function. A computational algorithm based on high order finite difference (FD) schemes, is employed to solve the Eulerian filtered compressible Navier-Stokes equations. In contrast, a Lagrangian Monte-Carlo solver based on the filtered mass density function is inv...

Journal: :international journal of advanced design and manufacturing technology 0
mohammadreza safaiy sayed reza saleh marjan goudarzi

the numerical method presented by safaiy et al. [1] is reformulated with finite volume method in its most general form and tested on non-orthogonal flow problems. navier-stokes equations are solved for the solution of stream function and vorticity. numerical solutions of the driven skewed cavity flow, solved using a fine grid (513×513) mesh, are presented for reynolds number of 100 and 1000 for...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2013
Peter Roger Bailey Antonella Abbá Daniela Tordella

Basic properties of the incompressible fluid motion in a rectangular cavity located along one wall of a plane channel are considered. For Mach numbers of the order of 1×10(-3) and using the incompressible formulation, we look for observable properties that can be associated with acoustic emission, which is normally observed in this kind of flow beyond a critical value of Reynolds number. The fo...

A computational study of partial cavitation over axisymmetric bodies is presented using two numerical methods. The first method is based on the VOF technique where transient 2D Navier-Stokes equations are solved along with an equation to track the cavity interface. Next, the steady boundary element method (BEM) based on potential flow theory is presented. The results of the two methods for a di...

2004
Hubert Chanson Carlos A. Gonzalez

New experiments were conducted in a large stepped channel with a 22o slope operating at large Reynolds numbers. Interactions between free-surface and cavity recirculation were systematically investigated in the skimming flow regime. Turbulence manipulation was further conducted and identical experiments were performed with 4 configurations. Basic results demonstrated a strong influence of cavit...

2008
D. D. Erickson W. W.

Flow past deep wall cavities exhibits strong interaction with the standing wave system in the cavity. The shear layer separating the exterior flow from the cavi ty flow supports i nstabil iti es which excite the normal cavity modes. In turn, the cavity wave system reirlforces the instabil i ­ ties. Experimental studies have shown that two distinct instability modes are encountered as the extern...

2005
Ercan Erturk

The numerical solutions of 2-D steady incompressible flow in a driven cavity are presented. The Navier-Stokes equations in streamfunction and vorticity variables are solved simply with Successive Over Relaxation (SOR) method. Using a very fine grid mesh with 1025×1025 points, the steady driven cavity flow is solved for Re 20,000. For accuracy, the iterations are carried out on the streamfunctio...

2003
Fuat Gürcan

Stokes flow in a rectangular cavity with two moving lids (with equal speed but in opposite directions) and aspect ratio A (height to width) is considered. An analytic solution for the streamfunction, ψ, expressed as an infinite series of Papkovich–Fadle eigenfunctions is used to reveal changes in flow structures as A is varied. Reducing A from A = 0.9 produces a sequence of flow transformations...

2014
Jianguo Li Qihan Liu Laurence Brassart Zhigang Suo

Pure substances can often be cooled below their melting points and still remain in the liquid state. For some supercooled liquids, a further cooling slows down viscous flow greatly, but does not slow down self-diffusion as much. We formulate a continuum theory that regards viscous flow and self-diffusion as concurrent, but distinct, processes. We generalize Newton’s law of viscosity to relate s...

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