Imaging of acoustically coupled oscillations due to flow past a shallow cavity: effect of cavity length scale

The effect of flow oscillations on cavity drag

An experimental investigation of flow over an axisymmetric cavity shows that self-sustained, periodic oscillations of the cavity shear layer are associated with low cavity drag. In this low-drag mode the flow regulates itself to fix the mean-shear-layer stagnation point at the downstream corner. Above a critical value of the cavity width-to-depth ratio there is an abrupt and large increase of d...

DENTAL CAVITY MYIASIS DUE TO WOHLFAHRTIA MAGNIFICA

A 79 year old fanner referred to a dental clinic because of toothache for one week. After extraction of a painful tooth, three larvae, 1.5 cm in length emerged from the dental cavity. Morphological study of the larvae proved them as W. magnifica. This is the first report of dental cavity myiasis from Iran.

Aiaa 2003-0008 Control of Forced and Self-sustained Oscillations in the Flow past a Cavity

This paper presents a series of experiments aimed at model-based feedback control of oscillations in the compressible flow past a rectangular cavity. Zeronet-mass air injection is used with feedback from pressure transducers located inside the cavity to suppress the oscillations, and measurements of the shear layer above the cavity are made for both the natural and suppressed state. A system id...

Imaging of the Self-Excited Oscillation of Past a Cavity During Generation of a Flow

Pod Based Models of Self-sustained Oscillations in the Flow past an Open Cavity

The goal of this work is to provide accurate dynamical models of oscillations in the flow past a rectangular cavity, for the purpose of bifurcation analysis and control. We have performed an extensive set of direct numerical simulations which provide the data used to derive and evaluate the models. Based on the method of Proper Orthogonal Decomposition (POD) and Galerkin projection, we obtain l...