نتایج جستجو برای: cavity flow

تعداد نتایج: 556238  

Journal: :AJNR. American journal of neuroradiology 1992
C F Gonzalez Y I Cho H V Ortega J Moret

PURPOSE To explain the origin and growth of intracranial aneurysms using the hemodynamic data obtained from a computer simulation. MATERIALS AND METHODS Pulsatile flow in an intracranial aneurysm cavity was numerically simulated based on physiologic pulsatile flow observed in the aorta. A finite element method was applied to solve the equations of motion and the non-Newtonian viscosity of blo...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2015
Rui Ni Mark H Michalski Elliott Brown Ngoc Doan Joseph Zinter Nicholas T Ouellette Gordon M Shepherd

The ability of humans to distinguish the delicate differences in food flavors depends mostly on retronasal smell, in which food volatiles entrained into the airway at the back of the oral cavity are transported by exhaled air through the nasal cavity to stimulate the olfactory receptor neurons. Little is known whether food volatiles are preferentially carried by retronasal flow toward the nasal...

2012
S. Sarkar

The three-dimensional incompressible flow past a rectangular open cavity is investigated, where the aspect ratio of the cavity is considered as 4. The principle objective is to use large-eddy simulation to resolve and control the large-scale structures, which are largely responsible for flow oscillations in a cavity. The flow past an open cavity is very common in aerospace applications and can ...

1998
Peyman Pakdel Gareth H. McKinley

Experimental observations of a purely elastic flow instability occurring in the lid-driven cavity flow of two semi-dilute polymer solutions are reported and the effect of cavity aspect ratio on the dynamical structure of the unstable flow is quantitatively investigated. The spatial and temporal characteristics of the secondary flow are measured using flow visualization, laser Doppler velocimetr...

2015
Stephen A. Jordan Stephen Jordan

The three-dimensional shear-driven cavity flow is numerically investigated at Reynolds numbers of 5000 and 10,000. This investigation focuses on the unsteadiness and turbulent characteristics of the flow. At the moderate Reynods number (Re = 5000) where the cavity flow is fully laminar, a direct numerical simulation (DNS) is used; at the higher Reynolds number (Re = 1 0,000), large-eddy simulat...

2004
David Lawrie B. Eng

Despite the amount of researchinto the cavity flow problem the prediction of the flow patterns, asso-ciated forces and acoustic phenomenaremains an unsolved problem. The coupling of the shear layerdynamics, the internal vortical structures and the acoustics of the cavity make it a very complex flowdespite the simple geometry. Once doors, stores and release mechanism are adde...

Milad Charmchi Saadat Zirak,

The flow behavior inside the shrouded disk system is of importance in appropriate design of turbomachinery cavities and turbine test cell hydraulics dynamometer. The turbulent incompressible flow is analyzed for the shrouded disk system with axial clearance. The flow core behaves as a Batchelor type structure when a weak inflow is imposed on the disk cavity. By increasing the inflow, the centra...

2007
Guillaume A. Brès Tim Colonius

Numerical Simulations of the twoand three-dimensional linearized Navier–Stokes equations are performed to investigate instabilities of open cavity flows that are homogeneous in the spanwise direction. First, the onset of two-dimensional cavity instability is characterized over a range of Mach numbers, Reynolds numbers and cavity aspect ratios. The resulting oscillations are consistent with the ...

2014
S. Jani M. Mahmoodi M. Amini

Magnetohydrodynamic free convection fluid flow and heat transfer in a square cavity filled with an electric conductive fluid with Prandtl number of 0.7 has been investigated numerically. The horizontal bottom wall of the cavity was kept at Th while the side and the top walls of the cavity were maintained at a constant temperature Tc with Th>Tc. The governing equations written in terms of the pr...

Journal: :Math. Comput. 2009
Zhiqiang Cai Yanqiu Wang

Discontinuous velocity boundary data for the lid driven cavity flow has long been causing difficulties in both theoretical analysis and numerical simulations. In finite element methods, the variational form for the driven cavity flow is not valid since the velocity is not in H. Hence standard error estimates do not work. By using only W1,r (1 < r < 2) regularity and constructing a continuous ap...

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